UIRotationGestureRecognizer的使用

gistfile1.m

UIRotationGestureRecognizer *rotationGestureRecognizer =
  [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationHandle:)];
[[self view] addGestureRecognizer:rotationGestureRecognizer];

-(void)rotationHandle:(UIRotationGestureRecognizer*)sender{
       CGFloat *rotation = sender.rotation;//旋转弧度
}