How to make a circular UIView

Question

I want to make a UIView or UIImageView that is a circle. Or a circle that i can change the size of using a slider, and the color of with a pickerview.

Answer 1

If somebody is looking for Swift equivalent than below is the answer (Xcode7.2):

(For this to work height and width must be equal.)

extension UIView {
    func makeCircular() {
        self.layer.cornerRadius = min(self.frame.size.height, self.frame.size.width) / 2.0
        self.clipsToBounds = true
    }
}