Rotate UIImageView clockwise

Question

This should be simple, but I\'m having trouble rotating a UIImageView a full 360 degrees, repeated forever.

[UIView animateWithDuration:0.5 delay:0          


        

Answer 1

Sorry missed first part, view rotates just fine using smaller angle:

[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionRepeat | UIViewAnimationOptionCurveLinear | UIViewAnimationOptionBeginFromCurrentState animations:^{
        redView.transform = CGAffineTransformRotate(redView.transform, M_PI_2);
    } completion:^(BOOL finished) {

    }];

I couldn't find any meaningful explanations why it fails with M_PI.