Hi as per my understanding you need to move the cropped image to one place to other place so you need to code it in the touches stuff...
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
cloud.center = location;
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[self touchesBegan:touches withEvent:event];
}
Here cloud is the UIImageView you can make it as cropped image ....
cloud.image=croppedImage; //[you must assign this first...]
i hope it helps you...