title: CATransform3D - go back to previous state
body: <p>Hi I`m working with CATransform3D.
  Every time that I call the following method with the variable radian the UIImageView is rotated “radian * M_PI” from the previous angle.
  I trying to go back to the original state. There is any way to do that?
  I mind I want to sent a radian value i.e. 10 and that the view maintain these angle if is called more than once.</p>
  
  <p>METHOD:</p>
  
  <hr>
  
  <pre><code>CATransform3D rotatedTransform = self.needleB.layer.transform;
  rotatedTransform = CATransform3DRotate(rotatedTransform, radian * M_PI / 180.0, 0.0f, 0.0f, 1.0f);
  self.needleB.layer.transform = rotatedTransform;
  self.needleB.layer.anchorPoint = CGPointMake(0.5, 0.9);
  self.needleB.center = CGPointMake(160, 250);
  </code></pre>
  
  <hr>
  
  <p>Thanks !!</p>