wkView禁止长按.png

wkWebView禁止长按2.png

直接上码了 ，难度不大！

 func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        webView.evaluateJavaScript("document.body.offsetHeight;") { (result, error) in
            var frame:CGRect = webView.frame
            frame.size.height = result as! CGFloat
            frame.size.height += self.webViewHeaderView.frame.size.height //顶部
            frame.size.height += self.webViewFooterView.frame.size.height //底部
            webView.frame = frame
            self.webView.scrollView.addSubview(self.webViewFooterView) // webView的内容加载完毕后再加载webViewFooterView
            self.webViewFooterView.frame =
                CGRect(x: 0,
                       y: webView.frame.maxY-self.webViewHeaderView.frame.size.height-self.webViewFooterView.frame.size.height,
                       width: screenWidth,
                       height: CGFloat(self.webFooterHeight))
            self.tableView.tableHeaderView = webView
        }
    
        // MARK: - 取得HTML内所有的图片
        let getImagesStr = "function getImages(){var objs = document.getElementsByTagName(\"img\");var imgSrc = '';for(var i=0;i<objs.length;i++){imgSrc=imgSrc + objs[i].src + '+';};return imgSrc;}"
        webView.evaluateJavaScript(getImagesStr, completionHandler: nil)
        webView.evaluateJavaScript("getImages()") { (result, error) in
            //printLog((result as! String).components(separatedBy: "+"))
            self.imgSrcArray = (result as! NSString).components(separatedBy: "+")
            //printLog(self.imgSrcArray)
        }
    
        var getImageClick = "function registerImageClickAction(){"
        getImageClick += " var imgs=document.getElementsByTagName('img');"
        getImageClick += " var length=imgs.length;"
        getImageClick += " for(var i=0;i<length;i++){"
        getImageClick += "   img=imgs[i];"
        getImageClick += "    img.onclick=function(){"
        getImageClick += "        window.location.href='img-preview:'+this.src}"
        getImageClick += " }"
        getImageClick += " }"
        webView.evaluateJavaScript(getImageClick, completionHandler: nil)
        webView.evaluateJavaScript("registerImageClickAction()") { (result, error) in
            //print(result)
        }
        //didFinish WKWebview 禁止长按
        webView.evaluateJavaScript("document.documentElement.style.webkitTouchCallout='none';")

   }
    
    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        let requestString =  navigationAction.request.url?.absoluteString
        if (requestString?.hasPrefix("img-preview:"))!{

            let imageUrl: String? = requestString?.substring(from: ("img-preview:").endIndex)
            printLog(imageUrl)
            let nextVC = ImageDetailController()
            nextVC.imageUrl = imageUrl!
            navigationController?.pushViewController(nextVC, animated: true)
        }
        decisionHandler(WKNavigationActionPolicy.allow)
    }
    
}