Given that I have a `UIImage` that has some large frame.

I put this `UIImage` into a `UIImageView *myImageView;`

I set the content mode of myImageView to `UIViewContentModeScaleAspectFill`.

I also set the frame of myImageView to (50,50).

However, my `UIImage` is significantly bigger than this smaller frame, and for some reason, the image always expands myImageView's frame size. 

How do I ensure that myImageView's frame stays constant and doesn't change from image to image?

Thank you!