旋转 UIImageView touchLocationInView 不正确

Question

I have a UIImageView and when I touch it I can get the location of the touch with:

[touch locationInView:theUIImageView]

The problem is that when I rotate the UIImageView with:

theUIImageView.transform = CGAffineTransformMakeRotation(DegreesToRadians(arc4random()%15));

the [touch locationInView:theUIImageView] no longer returns the correct location of the tap! *gasp!

Any suggestions on how to get the real tap location ?

Answer 1

Choose a different (possibly parent, something not rotated) view to use in locationInView. If you need a different coordinate system from there, you can always add your own offsets based on the frame of theUIImageView before the rotation.