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

Posted 2023-02-19

【中文标题】iPhone iOS如何在启用缩放时使UIScrollView与UIRotationGestureRecognizer一起工作？

【英文标题】：iPhone iOS how to make UIScrollView work with UIRotationGestureRecognizer when zooming is enabled?

【发布时间】：2012-04-06 15:53:39

【问题描述】：

我在 ios5 中工作，显然我应该能够使用 scrollView.pinchGestureRecognizer 控制或至少抑制 UIScrollView 的内部捏合手势识别器。

但是，我的代码似乎不起作用。识别器不会将我的班级视为代表，也不会等待我的旋转手势识别器失败。我该怎么做才能优先考虑旋转手势，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视图“飞离屏幕”向左下角，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;

        

    

【参考方案1】：

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