From cf07825667aa444c988c82b7e29cefc5f8ba7bcd Mon Sep 17 00:00:00 2001
From: Christian Resma Helle <christian.helle@outlook.com>
Date: Thu, 24 Nov 2016 16:30:33 +0100
Subject: [PATCH] Improve UIScreen Capture() support for complex views (#1235)

Use DrawViewHierarchy to capture a snapshot of the current screen
---
 src/UIKit/UIScreen.cs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/UIKit/UIScreen.cs b/src/UIKit/UIScreen.cs
index c941673a3f..d2271da501 100644
--- a/src/UIKit/UIScreen.cs
+++ b/src/UIKit/UIScreen.cs
@@ -37,6 +37,18 @@ namespace XamCore.UIKit {
 
 		public UIImage Capture ()
 		{
+			if (UIDevice.CurrentDevice.CheckSystemVersion (7, 0)) {
+				// This is from https://developer.apple.com/library/content/qa/qa1817/_index.html
+				try {
+					var view = UIApplication.SharedApplication.KeyWindow;
+					UIGraphics.BeginImageContextWithOptions (view.Bounds.Size, view.Opaque, 0);
+					view.DrawViewHierarchy (view.Bounds, true);
+					return UIGraphics.GetImageFromCurrentImageContext ();
+				} finally {
+					UIGraphics.EndImageContext ();
+				}
+			} 
+
 			// This is from: https://developer.apple.com/library/ios/#qa/qa2010/qa1703.html
 			var selScreen = new Selector ("screen");
 			var size = Bounds.Size;