iOS UIWebView中添加手势

iOS开发中，在UIWebView中添加手势的方法如下

// 监控界面点击手势
let singleTap = UITapGestureRecognizer(target: self, action: "singleTapAction:")
        
// 注意：不做如下处理，无法监控到单击手势
singleTap.cancelsTouchesInView = false
singleTap.delegate = self
        
self.webView.addGestureRecognizer(singleTap)

协议实现：

// MARK: - UIGestureRecognizerDelegate
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}