iphone - 在 webView 中取得联系

Question

我已经添加UIWebView 了，UIViewController然后又添加了一个UIViewController，ViewController然后我想联系一下UIwebView。

Answer 1

我有一个UIWebView作为孩子UIViewController的观点。对我有用的解决方案（标签手势）是这样的：

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onDoubleTap:)];
tap.numberOfTapsRequired = 1;
tap.delegate = self;

[self.webView addGestureRecognizer:tap];

我UIViewController正在从协议中实现以下方法UIGestureRecognizerDelegate（只是重新调整是）：

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Answer 2

要识别 的触摸事件UIWebview，UIScrollview 您可以使用 Gestures。不要忘记UIGestureRecognizerDelegate在 .h 文件中添加。

UITapGestureRecognizer *single = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneTap)];
    single.numberOfTapsRequired = 1;
    single.delegate = self;
    [webview addGestureRecognizer:single];

-(void)oneTap{
    NSLog(@"single");
}

Answer 3

您必须添加手势

首先在.h文件中设置委托

 -(void)ViewDidLoad
   {
          UITapGestureRecognizer   *gesture = [[UITapGestureRecognizer alloc]
       initWithTarget:self action:@selector(HandleGesture:)];
         gesture.delegate=self;
          gesture.numberOfTapsRequired = 1;
         [YourWebview addGestureRecognizer:gesture];
    }
   -(void)HandleGesture:(UITapGestureRecognizer *)sender
    {
        if (gesture.state == UIGestureRecognizerStateEnded)
        {

        }
        if (gesture.state == UIGestureRecognizerStateBegan)
        {
                    // You can write here any action
        }
    }
    - (BOOL)gestureRecognizer:(UITapGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
      // test if our control subview is on-screen
        if ([touch.view isKindOfClass:[UIWebView class]]) {
             // You can handle any thing
            return YES;
         }return NO; // handle the touch
      }

Answer 4

请注意，手势识别器的触摸是针对视图的，而不是基于页面的。因此，如果您希望您的应用程序响应网页上的特定项目，无论它滚动或缩放到何处，您最好使用 URL 方案向您的应用程序发送信号。