What do I have to do, if I need to rotate an UIImageView? I have an image which I want to rotate by 20 degrees.
The Apple Docs talk about an transformation Matrix, but that sounds incredible difficult. Are there any helpful methods or functions to achieve that?
As far as I know, using the matrix in UIAffineTransform is the only way to achieve a rotation without the help of a third-party framework.
A transformation matrix is not incredibly difficult. It's quite simple, if you use the supplied functions:
imgView.transform = CGAffineTransformMakeRotation(.34906585);
(.34906585 is 20 degrees in radians)