UITapGestureRecognizer 用于检测在我的屏幕上点击了哪个 UIView答案

【问题标题】：UITapGestureRecognizer for detecting which UIView was tapped on my screenUITapGestureRecognizer 用于检测在我的屏幕上点击了哪个 UIView
【发布时间】：2016-07-07 21:04:04
【问题描述】：

我正在使用UITapGestureRecognizer 来检测在我的屏幕上点击了哪个 UIView，但由于某种原因它只检测到父视图点击，例如下面的代码仅记录父视图标签。我如何检测主视图上存在的子视图点击。请建议。

Inside View did load :- 

UITapGestureRecognizer *viewTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(actionForViewTapped:)];
    [self.view addGestureRecognizer:viewTapRecognizer];


-(void) actionForViewTapped:(UITapGestureRecognizer*)sender {
    NSLog(@"view tapped");
    UIView *view = sender.view;
    NSLog(@"view tag is %lu", view.tag); //Always prints parent view tag. 

    if(view.tag == 10){
        NSLog(@"tag1 tapped"); // not called
    }
    if(view.tag == 20){
        NSLog(@"tag 2 tapped"); // not called
    }
}

【问题讨论】：

标签： ios objective-c

【解决方案1】：

您可以使用以下代码检测子视图，我刚刚测试了创建示例项目。

-(void) actionForViewTapped:(UITapGestureRecognizer*)sender {
    NSLog(@"view tapped");
    UIView *view = sender.view;
    CGPoint loc = [sender locationInView:view];
    UIView* subview = [view hitTest:loc withEvent:nil];
    NSLog(@"view tag is %lu", subview.tag); //will print Subview tag.

    if(view.tag == 10){
        NSLog(@"tag1 tapped");  
    }
    if(view.tag == 20){
        NSLog(@"tag 2 tapped");
    }
}

【讨论】：

【解决方案2】：

UIGestureRecognizer 用于单个视图。

如果你想使用UIGestureRecognizer，你必须为每个视图创建一个，调用相同的方法。

【讨论】：