using System;
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using System.Net;
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using CoreGraphics;
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using UIKit;
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namespace Shared
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{
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public class UrlMonitor : View
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{
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public UrlMonitor()
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{
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uiView = new UIImageView { Tag=int.MinValue};
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}
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public
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//是否已经启动
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bool isStarted;
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/// <summary>
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/// 用户名
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/// </summary>
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public string UserName = "";
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/// <summary>
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/// 密码
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/// </summary>
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public string Password = "";
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/// <summary>
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/// 摄像头的图片地址
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/// </summary>
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public string URL;
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/// <summary>
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/// 启动
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/// </summary>
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public void Start()
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{
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if (isStarted)
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{
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return;
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}
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isStarted = true;
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System.Threading.Tasks.Task.Run(() =>
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{
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while (isStarted)
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{
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System.Threading.Thread.Sleep(100);
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try
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{
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WebClient webClient = new WebClient();
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webClient.Headers.Add("Accept-Encoding", "gzip, deflate");
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webClient.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes(UserName + ":" + Password)));
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var bytes = webClient.DownloadData(URL);
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var uiImage = UIImage.LoadFromData(Foundation.NSData.FromArray(bytes));
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Application.RunOnMainThread(() =>
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{
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try
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{
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(uiView as UIImageView).Image = imimage(uiImage);
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}
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catch { }
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});
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}
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catch { }
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}
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});
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}
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/// <summary>
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/// 停止播放
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/// </summary>
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public void Stop()
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{
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isStarted = false;
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}
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/// <summary>
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/// 旋转当前画面
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/// </summary>
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/// <returns>源图</returns>
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/// <param name="image">旋转后的界面</param>
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UIImage imimage(UIImage image)
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{
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if (Application.IsPad)
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{
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return image;
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}
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else
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{
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var rotate = 3 * Math.PI / 2;
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var rect = new CGRect(0, 0, image.Size.Height, image.Size.Width);
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nfloat translateX = -rect.Size.Height;
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nfloat translateY = 0;
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nfloat scaleX = rect.Size.Height / rect.Size.Width;
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nfloat scaleY = rect.Size.Width / rect.Size.Height;
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//case UIImageOrientation.Right:
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//rotate = 3 * Math.PI / 2;
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// rect = new CGRect(0, 0, image.Size.Height, image.Size.Width);
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// translateX = -rect.Size.Height;
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// translateY = 0;
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// scaleY = rect.Size.Width / rect.Size.Height;
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// scaleX = rect.Size.Height / rect.Size.Width;
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// break;
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//case UIImageOrientation.Down:
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// rotate = M_PI;
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// rect = new CGRect(0, 0, image.Size.Width, image.Size.Height);
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// translateX = -rect.Size.Width;
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// translateY = -rect.Size.Height;
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// break;
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//default:
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// rotate = 0.0f;
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// rect = new CGRect(0, 0, image.Size.Width, image.Size.Height);
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// translateX = 0;
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// translateY = 0;
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// break;
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UIGraphics.BeginImageContext(rect.Size);
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var context = UIGraphics.GetCurrentContext();
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//做CTM变换
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context.TranslateCTM(0.0f, rect.Size.Height);
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context.ScaleCTM(1.0f, -1.0f);
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context.RotateCTM((nfloat)rotate);
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context.TranslateCTM(translateX, translateY);
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context.ScaleCTM(scaleX, scaleY);
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//绘制图片
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context.DrawImage(new CGRect(0, 0, rect.Size.Width, rect.Size.Height), image.CGImage);
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return UIGraphics.GetImageFromCurrentImageContext();
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}
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}
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}
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}
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