In my case, I create a custom button with a CAShapeLayer. I set the layer's path in layoutSubviews(), and then the bug appear.Just as you said, When I tap the button, it run to the textField's leftView, while the textField became the first responser, it run back the rightView. So I state a var to control the layout, and the issue resolved. private var layout = false override func layoutSubviews() {         super.layoutSubviews()         //         if self.layout {             return         } self.layout = true //do layout }