将UIWebView换成WKWebView后，原有的拨打电话、发送邮件失效的问题解决

使用WKWebView不能加载除了http及https开头的url，而UIWebView可以，所以需要自己调用，代码如下：

func webView(webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
        let urlStr = webView.URL?.absoluteString
        let lowUrlStr = urlStr!.lowercaseString
        if lowUrlStr.hasPrefix("sms") || lowUrlStr.hasPrefix("tel") || lowUrlStr.hasPrefix("mailto") {
            let app = UIApplication.sharedApplication()
            if app.canOpenURL(NSURL.init(string: lowUrlStr)!) {
                app.openURL(NSURL.init(string: lowUrlStr)!)
            }
            return
        }
    }

　　

http://blog.csdn.net/sinat_31484193/article/details/51482941