animate rotation UIImageView in swift

Question

I\'m trying to animate a rotation of 180 degrees of a UIImageView in Swift

    UIView.animateWithDuration(1.0, animations: { () -> Void in
              


        

Answer 1

You left out the / 180 on CGFloat(180 * M_PI). Try:

UIView.animate(withDuration: 1.0) {[weak self] in
    self?.arrowImageView.transform = CGAffineTransform(rotationAngle: CGFloat(Double.pi))
}