我有以下代码:
m_singleView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, nWidth - 1, nHeight - 1)];
m_singleView.backgroundColor = [UIColor clearColor];
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
[pinchGesture setCancelsTouchesInView:YES];
[m_singleView addGestureRecognizer:pinchGesture];
[m_singleView setUserInteractionEnabled:YES];
[m_MainView addSubview:m_singleView];
我遇到的问题是由于某种原因捏事件没有触发。但是,如果我将行从[m_singleView addGestureRecognizer:pinchGesture]
更改为[m_MainView addGestureRecognizer:pinchGesture];
,那么一切都会正常进行...我不能仅将事件添加到子视图吗?
谢谢!
答案 0 :(得分:2)
是的,您可以向子视图添加手势。我测试了您的代码,如下所示。
首先添加代表。
@interface ViewController : UIViewController<UIGestureRecognizerDelegate>
- (void)viewDidLoad {
[super viewDidLoad];
UIView *m_singleView = [[UIView alloc] initWithFrame:CGRectMake(50, 50, self.view.frame.size.width - 50, self.view.frame.size.height - 50)];
self.view.backgroundColor=[UIColor greenColor];
m_singleView.backgroundColor = [UIColor redColor];
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch)];
pinchGesture.delegate=self;
[pinchGesture setCancelsTouchesInView:YES];
[m_singleView addGestureRecognizer:pinchGesture];
[m_singleView setUserInteractionEnabled:YES];
[self.view addSubview:m_singleView];
}
-(void)pinch{
NSLog(@"In PInch");
}
您已经使用过pinchgesture,因此可以按以下方式使用它。
答案 1 :(得分:0)
使用Debug视图层次结构查看m_singleView的大小是否为0?如果是这样,则需要更改m_singleView的大小,直到您可以触摸它为止。