I need to crop a UIImage, taken with the device camera, so that it fits inside another UIImage, which represents a frame (with rounded
In interface Builder, access the Mode menu inside of the detail pane (the fourth one) and choose the right one for your UIImageView (I guess "center" or "aspect fit").

OLD ANSWER:
You can use the contentGravity property of CALayer to make it work
A constant that specifies how the layer's contents are positioned or scaled within its bounds.
@property(copy) NSString *contentsGravity