Question

I have implemented a rotation gesture for UIImageView.

Here is the Code that I implemented:

- (IBAction)rotaehandler:(UIRotationGestureRecognizer *)sender
{
    sender.view.transform = CGAffineTransformRotate(sender.view.transform, sender.rotation);
}

I connected UIRotationGestureRecognizer to UIImageView.
It works but, How can i rotate image form its center.

Answer 1

CGFloat initialRotation = atan2f(sender.view.transform.b-somefloat, sender.view.transform.a-somefloat);

 CGFloat newRotation = initialRotation + sender.rotation;

 sender.view.transform = CGAffineTransformMakeRotation(newRotation);

try above code