Rotate UIView around its center keeping its size

Question

I\'m trying to rotate an UIView a few radians but after applying the transformation it doesn\'t look to be keeping its size. What\'s the proper way to achieve t

Answer 1

Swift + extension are your friends!

// MARK: - UIView Extension -

extension UIView {

    /**
     Rotate a view by specified degrees

     - parameter angle: angle in degrees
     */
    func rotate(angle: CGFloat) {
        let radians = angle / 180.0 * CGFloat.pi
        let rotation = CGAffineTransformRotate(self.transform, radians);
        self.transform = rotation
    }

}

In this way, anywhere in your code:

let view = UIView(frame: CGRectMake(0, 0, 100, 100))
view.backgroundColor = UIcolor.redColor()
view.rotate(angle: 90)