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Improve UIScreen Capture() support for complex views #1235

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Merged
rolfbjarne merged 2 commits into from
Nov 24, 2016
Merged

Improve UIScreen Capture() support for complex views #1235

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7f8c081
Use DrawViewHierarchy to capture a snapshot of the current screen
christianhelle Nov 23, 2016
66bbd87
Fix minor style issue and remove else block
christianhelle Nov 24, 2016
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12 changes: 12 additions & 0 deletions src/UIKit/UIScreen.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,18 @@ public XamCore.CoreAnimation.CADisplayLink CreateDisplayLink (NSAction action)

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;
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