手势 UIRotationGestureRecognizer 旋转

UIRotationGestureRecognizer * rotationGesture = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];

   [redView addGestureRecognizer:rotationGesture];

 [rotationGesture release];

- (void)rotation:(UIRotationGestureRecognizer *)rotation
{
    rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
    rotation.rotation = 0;
}

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