iPhone iOS 如何在启用缩放时使 UIScrollView 与 UIRotationGestureRecognizer 一起工作？

Question

我在 iOS5 中工作，显然我应该能够使用 scrollView.pinchGestureRecognizer 控制或至少制服 UIScrollView 的内部捏合手势识别器。

但是，我的代码似乎不起作用。识别器不会将我的类(class)视为委托(delegate)，也不会等待我的旋转手势识别器失败。我该怎么做才能使旋转手势成为优先事项，然后再考虑捏合？

更准确地说，我遇到的问题是同时旋转和缩放的 View “飞出屏幕”向左下角移动，再也看不到了。

-(void)setup scrollViews
{
        [tempScrollView.pinchGestureRecognizer requireGestureRecognizerToFail:rotationRecognizer];
        tempScrollView.pinchGestureRecognizer.delegate = self;

        tempScrollView.maximumZoomScale = 4.0;
        tempScrollView.minimumZoomScale = 0.25;
//        
        tempScrollView.delegate = self;
}

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{

    if([gestureRecognizer isEqual:rotationRecognizer])
    {
       NSLog(@"Rotation gesture");
    }else {
        NSLog(@"Other gesture: %@", [gestureRecognizer class]);
    }
    return YES;

}

    - (IBAction)rotateView:(id)sender {

        if([sender isKindOfClass:[UIRotationGestureRecognizer class]])
        {
            UIRotationGestureRecognizer* recognizer = sender;

            float recognizerRotation = [recognizer rotation];
            CGAffineTransform transform = CGAffineTransformMakeRotation(recognizerRotation);
    activeView.transform = transform;

        }

    }

Answer 1

据我所知，UIScrollView 中的pinchGestureRecognizer 是只读的。但是，您可以尝试子类化 UIScrollView 并覆盖方法 addGestureRecognizer: 以禁用 pinchGestureRecognizer，然后添加您自己的自定义 pinchGestureRecognizer.