Question

Im using CGAffineTransformMakeScale to scale a UIView from 0.1 to 1.0.

The problem is that the view is also rotating while the scaling is being animated. So it ends with a scale of 1.0 AND 90º of rotation.

[self presentModalViewController:slideTwoViewController animated: NO];
[slideTwoViewController.view setTransform:CGAffineTransformMakeScale(0.1,0.1)];
[UIView beginAnimations: nil context: nil];
[UIView setAnimationDuration:2.0];
[slideTwoViewController.view setTransform:CGAffineTransformMakeScale(1.0,1.0)];
[UIView commitAnimations];

The initial application orientation is landscape left. So when the animation ends the UIView looks like in portrait.

Is this supposed to happen? am I missing something?

Thanks

Answer 1

My bet, is the view already have a transform set and you are overwriting it with the new transform and it is animating the difference.

Try using the following function instead:

CGAffineTransformScale(<#CGAffineTransform t#>, <#CGFloat sx#>, <#CGFloat sy#>)

With this function, you pass the original transform slideTwoViewController.view.transform and your scale factor.

slideTwoViewController.view.transform = CGAffineTransformScale(slideTwoViewController.view.transform, 0.1, 0.1);