Aspect Fit Background Color Spilling Over

Question

I need the image to always aspect Fit - as I need to to retain it's shape within any given frame, however, when I stick a background color on the image it spills over, no matter what I seem to do. Any help?

-(void)layoutSubviews
{
    [super layoutSubviews];
    self.clipsToBounds = YES;
    self.nonScoreBasedView.clipsToBounds = YES;
    self.nonScoreBasedView.layer.masksToBounds = YES;
    self.nonScoreBasedView.backgroundColor = [UIColor yellowColor];
}