Custom UIButton not highlighting when touched

In Swift, you can also override the isHighlighted var and add an alpha animation on it.

override var isHighlighted: Bool {    didSet {        UIView.animate(withDuration: 0.25, delay: 0, options: [.beginFromCurrentState, .allowUserInteraction], animations: {            self.alpha = self.isHighlighted ? 0.5 : 1        }, completion: nil)    }}

In your code, add the line button.showsTouchWhenHighlighted = TRUE;

If someone still encounters the problem - you should create UIButton like this:

UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];btn.layer.cornerRadius = 4;btn.layer.masksToBounds = YES;[btn setTranslatesAutoresizingMaskIntoConstraints:NO];[btn setBackgroundColor:[UIColor greenColor]];[btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];[btn setTitle:@"ok" forState:UIControlStateNormal];*** any customisation that you would like ***[parentView addSubview: btn];

So this way you still have iOS taking care of all highlighting. The main thing is using

[UIButton buttonWithType:UIButtonTypeSystem];

If you use initWithFrame or any other method - you would have to implement

setTitleColor: forState: setBackgroundImage: forState: