How do I make an UIImage/-View with rounded corners CGRect (Swift)

Question

How do I make a UIImageView with rounded corners on a Swift iOS Playground?
Inside it needs to be filled with a color.

Answer 1

Swift 5.0:

My personal preference is to have an extra swift file for specific changes like this one. What I do is then create a class e.g. "RoundCorner" which is a subclass of the element I want to change in this case a View element. And then I am overriding the individual settings.

class RoundCorner: UIView {
override func draw(_ rect: CGRect) {
    self.layer.cornerRadius = 10 // change this number to get the corners you want
    self.layer.masksToBounds = true
    }
}

After that, you only have to select the element you want this changes on, and set the custom class to the class we created earlier.

Look at the screenshot here