UIView shadow not working

Question

This is my code.

listView.layer.masksToBounds = NO;
listView.layer.shadowOffset = CGSizeMake(-3, 3);
listView.layer.shadowColor=[[UIColor blackColor] CGColor];
listView.layer.shadowRadius = 4;
listView.layer.shadowOpacity = 1.0;
[listView.layer setShouldRasterize:YES];

It works good with shadow effect.

While changing

listView.layer.masksToBounds = YES;

I didnt get shadow effect.

Answer 1

The shadow is actually drawn below the UIView. If you set maskToBounds to YES, this clips any drawing outside of the UIView frame. Here is a SO link that describes this in more detail.