iOS - weird UIView Offset

Question

I use this function to create image from uiview :

UIGraphicsBeginImageContextWithOptions(view.bounds.size, NO, 0.0f);
[view drawViewHierarchyInRect:view.bounds afterScreenUpdates:YES];
UIImage * snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return snapshotImage;

The code UIImage * snapshotImage = UIGraphicsGetImageFromCurrentImageContext(); make my screen have a glitch:

How can I resolve this issue? This only happen in ios8 . I do not have this issue in ios7 .

Answer 1

After much of trial and error, I found the course:

[view drawViewHierarchyInRect:view.bounds afterScreenUpdates:YES];

when afterScreenUpdates: set to YES , I will have that glitch. Once I set it to NO , the problem go away.