Capturing CATiledLayer content to another layer or image context

Question

I'm trying to screen capture a view that uses CATiledLayers (for animation) but unable to get the image that I want.

I tried it on Apple's "PhotoScroller" sample application and added this:

UIGraphicsBeginImageContext(self.view.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[self.view.layer renderInContext:ctx];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

However, the tiles don't render in the resulting UIImage and all I get is the tile outlines.

Seems that CATiledLayer's renderInContext behaves differently from CALayer.

Am I doing anything wrong in trying to capture the tiles? Is my only solution to render the tiles individually myself?

Answer 1

最后，我没有尝试将图块渲染到仅用于动画的另一视图中，而是创建了ImageScrollView的新实例，并在取消分配原始实例之前将原始实例和新实例动画在一起。