Answered by : dark-dingo-x4zphs14rg4d

 button.layer.cornerRadius = button.frame.size.height / 2
// must be in the viewDidLoad func 

Source : | Last Update : Sat, 18 Apr 20

Answered by : itchy-ibex-hutq8prbwp7x

 buttonRound.layer.cornerRadius = buttonRound.frame.size.height / 2

Source : | Last Update : Wed, 22 Apr 20

Answered by :

aButton.layer.cornerRadius = (원하는 테두리의 휘어짐 정도 : CGFloat) //15

Source : https://tong94.tistory.com/9 | Last Update : Wed, 07 Sep 22