ZigBeeApp中以郭学成的为最新版本，作为第二版本HomeApp的初始内容。

xm

2019-07-16 dda2b0dd45fffcdd28708903924a6b8519ee7c32

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using System;
using UIKit;
using CoreGraphics;
 
namespace Shared
{
    /// <summary>
    /// 对话框
    /// </summary>
    public class Alert
    {
        /// <summary>
        /// 当前对话框
        /// </summary>
        UIAlertView myUIAlertView;
 
        /// <summary>
        /// 代理
        /// </summary>
        MyUIAlertViewDelegate myUIAlertViewDelegate = new MyUIAlertViewDelegate();
 
        /// <summary>
        /// 对话窗
        /// </summary>
        /// <param name="title">标题</param>
        /// <param name="message">信息</param>
        /// <param name="cancelButtonText">取消按键备注，值null表示不显示取消按键</param>
        /// <param name="okButtonText">确认按键备注</param>
        public Alert(string title,string message,string cancelButtonText,string okButtonText)
        {
            myUIAlertView = new  UIAlertView ();
            myUIAlertView.Title = title;
            myUIAlertView.Message = message;
            myUIAlertView.Delegate = myUIAlertViewDelegate;
            if (cancelButtonText != null) {
                myUIAlertView.AddButton (cancelButtonText);
                myUIAlertViewDelegate.Flag = true;
            }
            myUIAlertView.AddButton (okButtonText);
 
            myUIAlertViewDelegate.ResultEventHandler+= (sender, e) => {
                if (ResultEventHandler != null) {
                    ResultEventHandler (sender, e);
                }
            };
 
        }
 
        /// <summary>
        /// 对话窗
        /// </summary>
        /// <param name="title">标题</param>
        /// <param name="message">信息</param>
        /// <param name="okButtonText">确认按键备注</param>
        public Alert(string title,string message,string okButtonText):this(title,message,null,okButtonText)
        {
            
        }
 
        /// <summary>
        /// 结果通知事件，true表示选中按键，false表示取消事件
        /// </summary>
        public event EventHandler<bool> ResultEventHandler;
    
        /// <summary>
        /// 显示当前的界面
        /// </summary>
        public void Show()
        {
            myUIAlertView.Show ();
        }
 
        /// <summary>
        /// 对话框事件处理代理
        /// </summary>
        class MyUIAlertViewDelegate : UIAlertViewDelegate
        {
            /// <summary>
            /// 通知结果
            /// </summary>
            public event EventHandler<bool> ResultEventHandler;
            /// <summary>
            /// 是否是有取消按键
            /// </summary>
            public bool Flag;
            public override void Clicked(UIAlertView alertview, nint buttonIndex)
            {
                if (ResultEventHandler != null)
                {
                    if (buttonIndex == 0)
                    {
                        if (Flag)
                        {
                            //取消按键
                            ResultEventHandler(alertview, false);
                        }
                        else {
                            //按了确定
                            ResultEventHandler(alertview, true);
                        }
                    }
                    else if (buttonIndex == 1)
                    {
                        //按了确定
                        ResultEventHandler(alertview, true);
                    }
                }
            }
        }
    }
}