How to reset the UIImageView Transformation Property

Question

In my project, I do the following in UIImageView 1.) rotate it 2.) move it 3.) increase it. My project also has a button with the name "New" that will reset all the settings for the app.my problem in that if I rotate the image and click on the new button, the UIImageVIew setting will not change. maybe someone has an idea. thanks in advance

-(void)rotate:(id)sender {

    if([(UIRotationGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {

        lastRotation = 0.0;
        return;
    }

    CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)sender rotation]);

    CGAffineTransform oldTransform = [(UIPinchGestureRecognizer*)sender view].transform;
    CGAffineTransform newTransform = CGAffineTransformRotate(oldTransform,rotation);

    [[(UIRotationGestureRecognizer*)sender view] setTransform:newTransform];

    lastRotation = [(UIRotationGestureRecognizer*)sender rotation];
}

Above is the code that I use for rotation.

Answer 1

If imageViewis your object UIImageView, the property transformis reset using

imageView.transform = CGAffineTransformIdentity;

Alternatively, you can shorten the method a bit rotate:if you are not using lastRotationit elsewhere.

-(void)rotate:(UIRotationGestureRecognizer *)gesture {
    UIView * view = gesture.view;
    view.transform = CGAffineTransformRotate(view.transform, gesture.rotation);
    gesture.rotation = 0;
}

Answer 2

Swift , , Deepak , UIImageView

extension UIImageView {

    func rotateCounterClockwise() {
        UIView.animateWithDuration(0.3, animations: {
           self.transform = CGAffineTransformMakeRotation(CGFloat(-M_PI))
    })
 }

    func rotateToOriginal() {
        UIView.animateWithDuration(0.3, animations: { 
           self.transform = CGAffineTransformIdentity
    })
 }

}