如何擁有多個UIWebviews，每個都有自己的UITapGestureRecognizer？

我有一個視圖控制器與3 UIWebViews，所有幀都覆蓋在一起。我使用三個按鈕在它們之間切換（類似於段控制）。我想附加一個輕敲手勢識別器到web視圖，以便點擊每個webview導致一個新的控制器。但是，只有第一個webview的UITapGestureRecognizer纔會觸發。任何人都可以告訴我如何讓另外兩個手勢識別器開火嗎？這是我的代碼：如何擁有多個UIWebviews，每個都有自己的UITapGestureRecognizer？

- (IBAction)changeWebView:(id)sender 
{ 
    UIButton *button = (UIButton *)sender; 

    switch (button.tag) { 
     case 0: 
     { 
      [self.view bringSubviewToFront:WebView1]; 

      for (UITapGestureRecognizer *recognizer in WebView2.gestureRecognizers) { 
       [WebView2 removeGestureRecognizer:recognizer]; 
      } 

      for (UITapGestureRecognizer *recognizer in WebView3.gestureRecognizers) { 
       [WebView3 removeGestureRecognizer:recognizer]; 
      } 


      UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showFullScreen1)]; 
      tapGestureRecognizer.delegate = self; 
      [WebView1 addGestureRecognizer:tapGestureRecognizer]; 

     } 
      break; 
     case 1: 
     { 
      [self.view bringSubviewToFront:WebView2]; 

      for (UITapGestureRecognizer *recognizer in WebView1.gestureRecognizers) { 
       [WebView1 removeGestureRecognizer:recognizer]; 
      } 

      for (UITapGestureRecognizer *recognizer in WebView3.gestureRecognizers) { 
       [WebView3 removeGestureRecognizer:recognizer]; 
      } 

      UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showFullScreen2)]; 
      tapGestureRecognizer.delegate = self; 
      [WebView2 addGestureRecognizer:tapGestureRecognizer]; 
     } 
      break; 
     case 2: 
     { 
      [self.view bringSubviewToFront:WebView3]; 

      for (UITapGestureRecognizer *recognizer in WebView1.gestureRecognizers) { 
       [WebView1 removeGestureRecognizer:recognizer]; 
      } 

      for (UITapGestureRecognizer *recognizer in WebView2.gestureRecognizers) { 
       [WebView2 removeGestureRecognizer:recognizer]; 
      } 

      UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showFullScreen3)]; 
      tapGestureRecognizer.delegate = self; 
      [WebView3 addGestureRecognizer:tapGestureRecognizer]; 
     } 
      break; 

     default: 
      break; 
    } 
}

來源

2014-02-13 dragonfly

這聽起來像是一個設計問題。你爲什麼不只有一個UIView，並根據按下哪個按鈕來呈現正確的內容。您可以只有一個手勢識別器，根據按鈕也可以加載正確的控制器（或執行正確的輪巡）。

來源

2014-02-13 09:29:36 Mika

感謝您的回覆，但我需要一次加載所有三個頁面，並且我還希望啓用Web視圖的縮放功能。所以我不能使用單個視圖，甚至不能在webviews上疊加一個透明的UIButton。 – dragonfly

將UITapGestureRecognizer添加到視圖中，並將全部3個UIWebview作爲子視圖添加到它們上。只要您檢測到要輕觸的UITapGestureRecognizer，就可以從segmentedController或按鈕中獲取標記，然後查找您正在使用的哪一個，並找到哪一個是輕擊的。

請勿添加UITapGestureRecognizer並一次又一次刪除它。

來源

2014-02-13 09:39:49 rahul

如何擁有多個UIWebviews，每個都有自己的UITapGestureRecognizer？

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