using System;
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using UIKit;
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using Shared.IO;
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using CoreGraphics;
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using Foundation;
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using CoreAnimation;
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namespace Shared
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{
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/// <summary>
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/// 位置布局
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/// </summary>
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public class HorizontalPages : ViewGroup
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{
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readonly MyHorizontalPages iosUIScrolView;
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/// <summary>
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/// 页面变化事件
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/// </summary>
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public Action<HorizontalPages, int> PageChange;
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/// <summary>
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/// 开始滑动事件
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/// </summary>
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public Action StartScrollAction;
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/// <summary>
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/// 结束滑动事件
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/// </summary>
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public Action EndScrollAction ;
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/// <summary>
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/// 没有更多提示Action，已经是最后一个
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/// </summary>
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public Action NoMoreAction;
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//ImageView LeftImageView = new ImageView() { ImagePath = "RoomIcon/1.jpg" };
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//ImageView RightImageView = new ImageView() { ImagePath = "RoomIcon/2.jpg" };
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/// <summary>
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/// 构造函数
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/// </summary>
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public HorizontalPages()
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{
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viewGroup = new UIView();
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iosUIScrolView = new MyHorizontalPages(this) { };
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iosUIScrolView.Bounces = false;
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InitMyHorizontalPagesEvent();
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realViewGroup = iosUIScrolView;
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//启动翻页功能
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//iosUIScrolView.PagingEnabled = true;
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iosUIScrolView.ShowsHorizontalScrollIndicator = false;
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viewGroup.AddSubview(iosUIScrolView);
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pagePadding = Application.GetRealWidth(50);
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rowPadding = Application.GetRealWidth(100);
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mTCBJ = Application.GetRealWidth(50);
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}
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ImageView LeftImageView;
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ImageView RightImageView;
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/// <summary>
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/// 是否设置了虚假背景View 设置了才显示
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/// </summary>
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bool IsSetLeftAndRightImageView = false;
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/// <summary>
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/// 设置控制最左和最右2边，填充的假背景View，不设置不显示，需要在AddChidren 前调用该方法
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/// </summary>
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/// <param name="mLeftImageView"></param>
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/// <param name="mRightImageView"></param>
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public void SetLeftAndRightImageView(ImageView mLeftImageView, ImageView mRightImageView)
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{
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if (mLeftImageView == null) return;
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if (mRightImageView == null) return;
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//设置之前先清空一次
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foreach (var view in iosUIScrolView.Subviews)
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{
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view.RemoveFromSuperview();
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}
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LeftImageView = mLeftImageView;
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iosUIScrolView.AddSubview(LeftImageView.RealView);
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LeftImageView.Parent = this;
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LeftImageView.Refresh();
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RightImageView = mRightImageView;
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iosUIScrolView.AddSubview(RightImageView.RealView);
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RightImageView.Parent = this;
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RightImageView.Refresh();
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IsSetLeftAndRightImageView = true;
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}
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bool isNoMore;
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bool isStart;
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int mTouchSlop = 20;
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nfloat beforeXScrollX;
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nfloat moveX;
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void InitMyHorizontalPagesEvent()
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{
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iosUIScrolView.Scrolled += (s, e) =>
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{
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//Shared.HDLUtils.WriteLine($"HorizontalPages Scrolled ContentOffsetX:{iosUIScrolView.ContentOffset.X}");
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moveX = iosUIScrolView.ContentOffset.X - beforeXScrollX;
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RefreshPageView();
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if (mTouchSlop < Math.Abs(moveX))
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{
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if (!isStart)
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{
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//当前索引为，不是第一个或者最后一个，滑动距离大于触发距离并且没执行过则 执行一次StartScrollAction
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if ((moveX > 0 && PageIndex < ChildrenCount - 1) || (moveX < 0 && PageIndex > 0))
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{
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isStart = true;
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StartScrollAction?.Invoke();
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}
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}
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if (!isNoMore && !bSendPageChange)
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{
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//当前索引为第一个或者最后一个，滑动距离大于触发距离、没执行过、PageIndex没变化、则执行一次NoMoreAction
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if ((moveX > 0 && PageIndex == ChildrenCount - 1 && iosUIScrolView.ContentOffset.X > iosUIScrolView.ContentSize.Width - iosUIScrolView.Frame.Width) || (moveX < 0 && PageIndex == 0 && iosUIScrolView.ContentOffset.X < 0))
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{
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isNoMore = true;
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NoMoreAction?.Invoke();
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}
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}
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}
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};
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iosUIScrolView.DraggingStarted += (sender, e) =>
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{
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//Shared.HDLUtils.WriteLine("HorizontalPages DraggingStarted");
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SetIsScrolling(true);
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beforeXScrollX = iosUIScrolView.ContentOffset.X;
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isStart = false;
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isNoMore = false;
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//StartScrollAction?.Invoke();
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};
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iosUIScrolView.DecelerationStarted += (s, e) =>
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{
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GetMovePageIndex();
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};
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iosUIScrolView.DecelerationEnded += (s, e) =>
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{
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if (!bSendPageChange && (PageIndex == ChildrenCount - 1 || PageIndex == 0 )) {
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//当前索引为，第一个或者最后一个，并且之前执行过开始Action
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SendEndScrollAction();
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}
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};
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iosUIScrolView.DraggingEnded += (s, e) =>
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{
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if (!e.Decelerate)
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{
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GetMovePageIndex();
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}
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};
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iosUIScrolView.ScrollAnimationEnded += (s, e) =>
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{
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//Shared.HDLUtils.WriteLine("HorizontalPages ScrollAnimationEnded");
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SendIfPageChange();
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SetIsScrolling(false);
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};
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}
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private void GetMovePageIndex()
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{
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if (mTouchSlop < Math.Abs(moveX))
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{
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if (moveX < 0)
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{
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PageIndex -= 1;
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}
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else if (moveX > 0)
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{
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PageIndex += 1;
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}
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}
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else
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{
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PageIndex = PageIndex;
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}
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}
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//两个Page界面之间的距离
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int pagePadding;
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/// <summary>
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/// 界面之间的边距
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/// </summary>
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public int JMBJ
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{
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get
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{
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return pagePadding;
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}
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set
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{
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pagePadding = value;
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rowPadding = mTCBJ + pagePadding;
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RefreshScrollWidth();
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ReLocation();
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}
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}
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//page的与手机屏幕的边距 = 突出宽度 + 两个Page之间的距离
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int rowPadding;
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/// <summary>
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/// 突出宽度
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/// </summary>
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int mTCBJ;
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public int TCBJ
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{
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get
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{
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return mTCBJ;
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}
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set
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{
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mTCBJ = value;
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rowPadding = mTCBJ + pagePadding;
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RefreshScrollWidth();
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ReLocation();
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}
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}
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int mScrollWidth;
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int mPageWidth;
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private void RefreshScrollWidth()
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{
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mScrollWidth = (int)this.RealView.Frame.Width - 2 * rowPadding + pagePadding;
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mPageWidth = (int)this.RealView.Frame.Width - 2 * rowPadding;
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}
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/// <summary>
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/// 自动计算刷新所有View的高度，实现缩放效果
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/// </summary>
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private void RefreshPageView()
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{
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//RefreshView();
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//RefreshViewWithTransform3D();
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//RefreshViewWithChangeHeight();
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RefreshViewWithChangeHeightNew();
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//RefreshViewWithChangeHeightSF();
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}
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//********************Transform3D 旋转效果方法**********************
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//默认25度
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nfloat transformAngle = (nfloat)(25 * Math.PI / 180.0);
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//旋转角度
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public int TransformAngle
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{
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set
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{
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transformAngle = (nfloat)(value * Math.PI / 180.0);
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}
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}
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///// <summary>
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///// 旋转效果
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///// </summary>
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//public void RefreshViewWithTransform3D()
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//{
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// if (ChildrenCount <= 0) return;
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// if (PageIndex > ChildrenCount - 1)
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// {
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// PageIndex = ChildrenCount - 1;
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// }
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// // - 单位矩阵
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// CATransform3D transform = CATransform3D.Identity;
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// // - 增加透视效果
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// transform.m34 = (nfloat)(-1.0 / 500);
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// var mRotate = transform.Rotate(0, 0f, 1f, 0f);
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// iosUIScrolView.Subviews[PageIndex].Layer.Transform = mRotate;
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// //判断PageIndex 前后是否有view，并旋转
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// if (PageIndex - 1 >= 0)
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// {
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// var mRotate1 = transform.Rotate(transformAngle, 0f, 1f, 0f);
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// iosUIScrolView.Subviews[PageIndex - 1].Layer.Transform = mRotate1;
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// }
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// if (PageIndex <= ChildrenCount - 2)
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// {
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// var mRotate2 = transform.Rotate(-1 * transformAngle, 0f, 1f, 0f);
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// iosUIScrolView.Subviews[PageIndex + 1].Layer.Transform = mRotate2;
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// }
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//}
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/// <summary>
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/// 刷新最大距离值
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/// </summary>
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double MaxDistance;
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private void RefreshViewWithChangeHeight()
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{
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if (ChildrenCount <= 0) return;
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if (PageIndex > ChildrenCount - 1)
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{
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PageIndex = ChildrenCount - 1;
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}
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MaxDistance = Width - 2 * TCBJ - JMBJ;
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double centerX = iosUIScrolView.ContentOffset.X + iosUIScrolView.Frame.Width * 0.5;
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foreach (UIView mSubview in iosUIScrolView.Subviews)
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{
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double distance = Math.Abs(mSubview.Center.X - centerX);
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var HH = 0;
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if (distance <= 0)
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{
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HH = 0;
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}
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else if (distance >= MaxDistance)
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{
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HH = JMBJ;
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}
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else
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{
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HH = (int)((distance / MaxDistance) * JMBJ);
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}
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var mFrame = mSubview.Frame;
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mFrame.Height = Height - HH * 2;
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mFrame.Y = HH;
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mSubview.Frame = mFrame;
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//mSubview.MaskView
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//double distance = Math.Abs(mSubview.Center.X - centerX);
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//double factor = 0.01;
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//float scale = (float)(1.0 / (1 + distance * factor));
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////var mFrame = mSubview.Frame;
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////mFrame.Height = Height * scale;
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////mFrame.Y = (Height - mFrame.Height) / 2;
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////mSubview.Frame = mFrame;
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//var mFrame = mSubview.Frame;
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//var HH = (int)(MaxChangeHeight - MaxChangeHeight * scale);
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//mFrame.Height = Height - HH;
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//mFrame.Y = HH / 2;
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//mSubview.Frame = mFrame;
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}
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}
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/// <summary>
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/// 同时刷新子view 和ImageView的高度，暂时解决底部圆角失效问题
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/// </summary>
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/// <param name="mView"></param>
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/// <param name="height"></param>
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void RefreshSubviewHeight(View mView, nfloat height)
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{
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try
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{
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if (mView is ViewGroup)
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{
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var tempViewGroup = (ViewGroup)mView;
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for (int i = 0; i < tempViewGroup.ChildrenCount; i++)
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{
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if (tempViewGroup.GetChildren(i) is ViewGroup)
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{
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var tempViewGroup2 = (ViewGroup)tempViewGroup.GetChildren(i);
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for (int j = 0; j < tempViewGroup2.ChildrenCount; j++)
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{
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if (tempViewGroup2.GetChildren(j) is ImageView && tempViewGroup2.GetChildren(j).Tag.ToString() == "R")
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{
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tempViewGroup2.GetChildren(j).Height = (int)height;
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break;
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}
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}
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if (tempViewGroup2.Tag.ToString() == "R")
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{
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tempViewGroup2.Height = (int)height;
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break;
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}
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}
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}
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}
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}
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catch { }
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}
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/// <summary>
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/// 计算滑动缩放高度的方法
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/// </summary>
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private void RefreshViewWithChangeHeightNew()
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{
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if (ChildrenCount <= 0) return;
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if (PageIndex > ChildrenCount - 1)
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{
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PageIndex = ChildrenCount - 1;
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}
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MaxDistance = Width - 2 * TCBJ - JMBJ;
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double centerX = iosUIScrolView.ContentOffset.X + iosUIScrolView.Frame.Width * 0.5;
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for (int i = 0; i < ChildrenCount; i++)
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{
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var mSubview = GetChildren(i).RealView;
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var view = GetChildren(i);
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double distance = Math.Abs(mSubview.Center.X - centerX);
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var HH = 0;
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if (distance <= 0)
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{
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HH = 0;
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}
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else if (distance >= MaxDistance)
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{
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HH = JMBJ;
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}
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else
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{
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HH = (int)((distance / MaxDistance) * JMBJ);
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}
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var mFrame = mSubview.Frame;
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mFrame.Height = Height - HH * 2;
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mFrame.Y = HH;
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mSubview.Frame = mFrame;
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RefreshSubviewHeight(view, mFrame.Height);
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}
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}
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//private void RefreshViewWithChangeHeightSF()
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//{
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// if (ChildrenCount <= 0) return;
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// if (PageIndex > ChildrenCount - 1)
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// {
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// PageIndex = ChildrenCount - 1;
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// }
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// MaxDistance = Width - 2 * TCBJ - JMBJ;
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// double centerX = iosUIScrolView.ContentOffset.X + iosUIScrolView.Frame.Width * 0.5;
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// foreach (UIView mSubview in iosUIScrolView.Subviews)
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// {
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// double distance = Math.Abs(mSubview.Center.X - centerX);
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// nfloat HH = 1;
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// if (distance <= 0)
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// {
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// mSubview.Transform = CGAffineTransform.MakeScale(1.0f, 1.0f);
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// }
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// else if (distance >= MaxDistance)
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// {
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// mSubview.Transform = CGAffineTransform.MakeScale(1.0f, 0.8f);
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// }
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// else
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// {
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// HH = (nfloat)((1-distance / MaxDistance) * 0.2f) + 0.8f;
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// mSubview.Transform = CGAffineTransform.MakeScale(1.0f, 0.8f);
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// }
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// }
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//}
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/// <summary>
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/// 是否允许滑动
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/// </summary>
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/// <value><c>true</c> if scroll enabled; otherwise, <c>false</c>.</value>
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public bool ScrollEnabled
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{
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get
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{
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return (iosUIScrolView as MyHorizontalPages).ScrollEnabled;
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}
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set
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{
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(iosUIScrolView as MyHorizontalPages).ScrollEnabled = value;
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}
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}
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int pageIndex;
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/// <summary>
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/// 设置或者获取当前的界面索引
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/// </summary>
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/// <value>The index of the page.</value>
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public int PageIndex
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{
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get
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{
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return pageIndex;
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}
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set
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{
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if (value < 0 || ChildrenCount <= value)
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{
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return;
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}
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int beforePageIndex = pageIndex;
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pageIndex = value;
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if (!IsCanRefresh)
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{
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return;
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}
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var viewSize = iosUIScrolView.Frame.Size;
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RefreshPageView();
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var rect = new CGRect(pageIndex * viewSize.Width, 0, viewSize.Width, viewSize.Height);
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if (pageIndex != 0)
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{
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var frame = GetChildren(pageIndex).RealView.Frame;
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var w = frame.X - rowPadding;
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rect = new CGRect(w, 0, viewSize.Width, viewSize.Height);
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//Shared.HDLUtils.WriteLine($"CGRect xx-------{w}");
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}
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//Shared.HDLUtils.WriteLine($"pageIndex xx-------{pageIndex}");
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iosUIScrolView.ScrollRectToVisible(rect, true);
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if (beforePageIndex != pageIndex)
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{
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bSendPageChange = true;//发送改变标志
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if (!isStart)
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{
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isStart = true;
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StartScrollAction?.Invoke();
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}
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}
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else
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{
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SendEndScrollAction();
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}
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}
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}
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/// <summary>
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/// 判断是否需要发送结束滑动事件
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/// </summary>
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void SendEndScrollAction() {
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if (isStart)
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{
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isStart = false;
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EndScrollAction?.Invoke();
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}
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}
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bool bSendPageChange = false;
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/// <summary>
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/// 判断是否要发送改变事件
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/// </summary>
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private void SendIfPageChange()
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{
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if (bSendPageChange)
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{
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bSendPageChange = false;
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PageChange?.Invoke(this, pageIndex);
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}
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//判断是否需要发送结束滑动事件
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SendEndScrollAction();
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}
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bool isScrolling;
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/// <summary>
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/// 是否正在滑动
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/// </summary>
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public bool ISScrolling
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{
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get
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{
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return isScrolling;
|
}
|
}
|
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private void SetIsScrolling(bool bSctolling)
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{
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if (isScrolling == bSctolling) return;
|
|
Shared.HDLUtils.WriteLine($"HorizontalPages StartScroll: {bSctolling}");
|
isScrolling = bSctolling;
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}
|
|
/// <summary>
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/// 是否正在滑动
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/// </summary>
|
/// <value><c>true</c> if decelerating; otherwise, <c>false</c>.</value>
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public bool Decelerating
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{
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get
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{
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return iosUIScrolView.Decelerating;
|
}
|
}
|
|
//public void DelayPageChange()
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//{
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// PageChange?.Invoke(this, pageIndex);
|
|
// //new System.Threading.Thread(async () =>
|
// //{
|
// // System.Threading.Thread.Sleep(500);
|
// // Application.RunOnMainThread(() =>
|
// // {
|
// // PageChange?.Invoke(this, pageIndex);
|
// // });
|
// //})
|
// //{ IsBackground = true }.Start();
|
//}
|
|
/// <summary>
|
/// 增加子控件
|
/// </summary>
|
/// <param name="view">View.</param>
|
public override void AddChidren(View view)
|
{
|
base.AddChidren(view);
|
ReLocation();
|
}
|
|
/// <summary>
|
/// 重新排位置及设备内容大小
|
/// </summary>
|
public virtual void ReLocation()
|
{
|
try
|
{
|
if (ChildrenCount == 0)
|
{
|
return;
|
}
|
|
|
var frame0 = GetChildren(0).RealView.Frame;
|
frame0.X = rowPadding;
|
frame0.Y = 0;
|
frame0.Width = mPageWidth;
|
frame0.Height = iosUIScrolView.Frame.Height;
|
GetChildren(0).RealView.Frame = frame0;
|
|
|
|
for (int i = 1; i < ChildrenCount; i++)
|
{
|
var frame = GetChildren(i).RealView.Frame;
|
|
frame.Width = mPageWidth;
|
frame.Height = iosUIScrolView.Frame.Height;
|
frame.Y = 0;
|
//frame.X = iosUIScrolView.Subviews[i - 1].Frame.Right + pagePadding;
|
frame.X = rowPadding + (mPageWidth + pagePadding) * i;
|
GetChildren(i).RealView.Frame = frame;
|
}
|
iosUIScrolView.ContentSize = new CoreGraphics.CGSize(GetChildren(ChildrenCount - 1).RealView.Frame.Right + rowPadding, iosUIScrolView.Frame.Height);
|
|
//iosUIScrolView.ContentSize = new CoreGraphics.CGSize(iosUIScrolView.Subviews[ChildrenCount - 1].Frame.Right + rowPadding, iosUIScrolView.Frame.Height);
|
|
if (IsSetLeftAndRightImageView)
|
{
|
var leftFrame = iosUIScrolView.Subviews[0].Frame;
|
leftFrame.X = TCBJ - mPageWidth;
|
leftFrame.Y = JMBJ;
|
leftFrame.Width = mPageWidth;
|
leftFrame.Height = Height - JMBJ * 2;
|
iosUIScrolView.Subviews[0].Frame = leftFrame;
|
|
|
var rightFrame = iosUIScrolView.Subviews[1].Frame;
|
rightFrame.X = rowPadding + (mPageWidth + pagePadding) * (ChildrenCount);
|
rightFrame.Y = JMBJ;
|
rightFrame.Width = mPageWidth;
|
rightFrame.Height = Height - JMBJ * 2;
|
iosUIScrolView.Subviews[1].Frame = rightFrame;
|
}
|
|
RefreshPageView();
|
}
|
catch { }
|
}
|
|
|
|
/// <summary>
|
/// 控件宽度
|
/// </summary>
|
/// <value>The width.</value>
|
public override int Width
|
{
|
get
|
{
|
return base.Width;
|
}
|
set
|
{
|
base.Width = value;
|
|
if (!IsCanRefresh)
|
return;
|
|
|
}
|
}
|
|
/// <summary>
|
/// 控件的高度
|
/// </summary>
|
/// <value>The height.</value>
|
public override int Height
|
{
|
get
|
{
|
return base.Height;
|
}
|
set
|
{
|
base.Height = value;
|
if (!IsCanRefresh)
|
return;
|
|
}
|
}
|
|
/// <summary>
|
/// Bounces
|
/// </summary>
|
public bool Bounces
|
{
|
get
|
{
|
return iosUIScrolView.Bounces;
|
}
|
set
|
{
|
iosUIScrolView.Bounces = value;
|
}
|
}
|
|
|
|
|
/// <summary>
|
/// 移除当前控件
|
/// </summary>
|
/// <param name="view">View.</param>
|
internal override void Remove(View view)
|
{
|
base.Remove(view);
|
ReLocation();
|
|
if (PageIndex > ChildrenCount - 1)
|
{
|
PageIndex = ChildrenCount - 1;
|
}
|
|
}
|
|
/// <summary>
|
/// 移除所有的控件
|
/// </summary>
|
public override void RemoveAll()
|
{
|
base.RemoveAll();
|
ReLocation();
|
PageIndex = 0;
|
}
|
|
/// <summary>
|
/// 根据索引移除控件
|
/// </summary>
|
/// <param name="index">Index.</param>
|
public override void RemoveAt(int index)
|
{
|
if (viewList.Count - 1 < index || index < 0)
|
{
|
return;
|
}
|
Remove(viewList[index]);
|
}
|
|
|
/// <summary>
|
/// 垂直方向滚动视图
|
/// </summary>
|
class MyHorizontalPages : UIScrollView
|
{
|
|
[Weak] HorizontalPages HorizontalPages;
|
public MyHorizontalPages(HorizontalPages HorizontalPages)
|
{
|
|
this.HorizontalPages = HorizontalPages;
|
}
|
|
///// <summary>
|
///// 点击开始
|
///// </summary>
|
///// <param name="touches">Touches.</param>
|
///// <param name="evt">Evt.</param>
|
//public override void TouchesBegan(NSSet touches, UIEvent evt)
|
//{
|
|
// HorizontalPages?.TouchEvent(EventActions.Down, (touches.AnyObject as UITouch).LocationInView(this));
|
|
//}
|
|
//int mTouchSlop = 20;
|
//bool bMove;
|
///// <summary>
|
///// 移动
|
///// </summary>
|
///// <param name="touches">Touches.</param>
|
///// <param name="evt">Evt.</param>
|
//public override void TouchesMoved(NSSet touches, UIEvent evt)
|
//{
|
// HorizontalPages?.TouchEvent(EventActions.Move, (touches.AnyObject as UITouch).LocationInView(this));
|
|
//}
|
///// <summary>
|
///// 点击弹起
|
///// </summary>
|
///// <param name="touches">Touches.</param>
|
///// <param name="evt">Evt.</param>
|
//public override void TouchesEnded(NSSet touches, UIEvent evt)
|
//{
|
// HorizontalPages?.TouchEvent(EventActions.Up, (touches.AnyObject as UITouch).LocationInView(this));
|
//}
|
|
//public override void TouchesCancelled(NSSet touches, UIEvent evt)
|
//{
|
// HorizontalPages?.TouchEvent(EventActions.Cancel, (touches.AnyObject as UITouch).LocationInView(this));
|
//}
|
/// <summary>
|
/// 框架默认加了两个UIImageView ，这样可以去掉默认添加
|
/// </summary>
|
/// <param name="view">View.</param>
|
public override void AddSubview(UIView view)
|
{
|
if (view.GetType() == typeof(UIImageView) && view.Tag != int.MinValue)
|
{
|
return;
|
}
|
|
if (view.ToString().Contains("UIScrollViewScrollIndicator"))
|
{
|
return;
|
}
|
base.AddSubview(view);
|
}
|
}
|
}
|
}
|
