UITapGestureRecognizer用於檢測在我的屏幕上點擊哪個UIView

Question

我使用UITapGestureRecognizer來檢測哪個UIView是在我的屏幕上點擊的，但由於某種原因，它僅檢測到父級視圖點擊，例如僅在代碼日誌下方顯示父視圖標記。我如何檢測出現在主視圖上的子視圖水龍頭。請建議。

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 
    } 
} 

Answer 1

您可以使用以下代碼檢測子視圖，我剛剛測試了創建示例項目。

-(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"); 
    } 
} 

Answer 2

A UIGestureRecognizer將與單個視圖一起使用。

如果你想使用UIGestureRecognizer你必須爲每個視圖創建一個，調用相同的方法。