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

90 degrees rotation

var shouldRotateArrow = false {
    didSet {
        rotateArrow()
    }
}

private func rotateArrow() {
    let angle: CGFloat = shouldRotateArrow ? .pi / 2 : 0
    UIView.animate(withDuration: Constants.arrowRotationDuration) {
        self.arrowImageView.transform = CGAffineTransform(rotationAngle: angle)
    }
}