ios - View is pixelated when scaled down

ios - View is pixelated when scaled down

I have a UIView that is composed of two UIImageViews. They are concentric
circle shapes. When I scale this view down like this:
CABasicAnimation *resizeAnimation = [CABasicAnimation
animationWithKeyPath:@"transform.scale"];
resizeAnimation.fromValue = [NSNumber numberWithDouble:1.0];
resizeAnimation.toValue = [NSNumber numberWithDouble:0.25];
resizeAnimation.fillMode = kCAFillModeForwards;
resizeAnimation.removedOnCompletion = NO;
The edges of the images get rough and pixelated when scaled down. Is there
anything I can do to prevent this or at least minimize it?