将UITapGestureRecognizer添加到UIWebView

Question

在iOS中,是否可以在UIWebView上放置点击识别器,以便当有人单击Web视图时,会执行某个操作？

当我点击我的webView时,下面的代码似乎没有火手柄.

谢谢.

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

[webView addGestureRecognizer:tap];
[tap release]; 


-(void) handleTap {
    NSLog(@"tap");
}

Answer 1

我发现我必须实现这个方法才能让它工作:

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

Answer 2

你的UIViewController子类应该实现UIGestureRecognizerDelegate并返回YES从gestureRecognizer: shouldReceiveTouch:适当的时候.

然后,您可以将其分配给UIGestureRecognizer的delegate属性.

tap.delegate = self;

Answer 3

1. 添加UIGestureRecognizerDelegate以查看控制器

   <UIGestureRecognizerDelegate>
   

2. 将Tap Gesture添加到Webview.

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

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