Mixed usage of Auto Layout with non-Auto Layout

Sometimes you may want to perform some additional actions to Auto Layout calculations done by UIKit itself. Example: when you have a UIView that has a maskLayer, you may need to update maskLayer as soon as Auto

Layout changes UIView’s frame

// CustomView.m- (void)layoutSubviews {
    [super layoutSubviews];
    // now you can assume Auto Layout did its job
    // you can use view's frame in your calculations
    CALayer maskLayer = self.maskLayer;
    maskLayer.bounds = self.bounds;
    ...
}