issues with UIImageView.layer.cornerRadius to create rounded images on different pixel densities ios

Question

I'm simply trying to create a perfectly round image. Here's my swift code:

myImage.layer.cornerRadius = myImage.frame.size.width/2
myImage.layer.masksToBounds = true

This works on a 4s, but is not quite round on a 5s, and appears as a rounded rectangle on a iphone 6.

I'm assuming this has to do with frame.size.width returning values in pixels not points or something like that, but I've been unable to solve this problem.

Answer 1

If your code is in viewDidLoad in ViewController, try moving it to viewDidLayoutSubviews.

If your rounded imageView is in tableViewCell, try moving it to draw.

override func draw(_ rect: CGRect) {
    avatarView.layer.cornerRadius = avatarView.frame.size.width / 2
    avatarView.layer.masksToBounds = true
    avatarView.clipsToBounds = true
    avatarView.contentMode = .scaleAspectFill
}