高分辨率屏幕上的 UIButton 角半径

Question

I'm trying to create a circular UIButton in Swift. The button is 112px width and height and the code below works well in devices with at most, 4-inches screen.

button.layer.masksToBounds = false;
button.layer.cornerRadius = button.bounds.size.height/2;
button.clipsToBounds = true;

With bigger screens the button turns like this:

Any idea?

Thanks in advance.

Answer 1

You need to adjust the cornerRadius after Auto Layout has sized your button. Do this in an override of viewDidLayoutSubviews :

override func viewDidLayoutSubviews() {
    button.layer.cornerRadius = button.bounds.size.height/2
}