UIImageView will not resize to match UIView's frame

Question

I want my background to be an image, so in IB I set a UIImageView with the constraints to be the same size as the its UIView. However, when I select "back" on the UINavigationBar, when the NavControl pops to the previous VC, this is what's there, briefly, before it disappears:

That is, the UIImageView is so big that it is almost double the width of the UIView, so as it slides off-screen to the right, the UIImageView's image drags on before finally disappearing.

I have also tried to do this programmatically, but even if I set the UIImageView's frame to be CGRectMake(0, 0, 100, 100), it still goes off to the left side of the UIView, as if the UIView's origin weren't at the top left corner, but slightly off the screen. Is this possible? How do I make it so the image fits the screen and doesn't go off?

If it's at all relevant, the jpg I'm using is in Images.xcassets and, although I can select it in IB and it appears, the UIImageView's image is white/blank, so in my viewDidLoad method I need to specify self.imageView.image = [UIImage imageNamed:@"hockeyIce.jpg"].

Answer 1

1. go to Main.storyboard
2. select the view in question
3. click Attributes Inspector
4. scroll down to View, select Mode: Scale To Fill

Answer 2

OK, the solution was to add [self.imageView setClipsToBounds:YES] to my viewDidLoad. It turns out that this is a common problem with aspectFill.