WKWebView捕获HTML弹出的Alert和Confirm-白红宇

之前用WebView装载一个网页时，弹出Alert时会显示网址，由于不想把网址暴露给用户这样显示就不是很友好了。UIWebView文档内没有找到可以捕获这类信息的API。GOOGLE了下发现了WKWebView组件，WKWebView是IOS8新推出的组件，目的是给出一个新的高性能的 Web View 解决方案，摆脱过去 UIWebView 的老旧笨重特别是内存占用量巨大的问题。以下为示例代码：

////  ViewController.swift//  KenWKWebView////  Created by KenNgai on 10/10/15.//  Copyright © 2015 IT. All rights reserved.//import UIKitimport WebKit //导入WebKit  WKWebView应该是用Webkit内核class ViewController: UIViewController,WKNavigationDelegate,WKUIDelegate {    var wkBrowser:WKWebView!        override func viewDidLoad() {        super.viewDidLoad()        self.wkBrowser = WKWebView(frame: self.view.frame)        //self.wkBrowser.loadRequest(NSURLRequest(URL: NSURL(string: "http://www.baidu.com")!))        let html = "DialogAlert
Logout"        self.wkBrowser.loadHTMLString(html, baseURL: nil)        self.wkBrowser.navigationDelegate = self        self.wkBrowser.UIDelegate = self        self.view.addSubview(wkBrowser)    }        override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }}//捕捉异常信息private typealias wkNavigationDelegate = ViewControllerextension wkNavigationDelegate {    func webView(webView: WKWebView, didFailNavigation navigation: WKNavigation!, withError error: NSError) {        NSLog(error.debugDescription)    }        func webView(webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: NSError) {        NSLog(error.debugDescription)    }}private typealias wkUIDelegate = ViewControllerextension wkUIDelegate {    //HTML页面Alert出内容    func webView(webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: () -> Void) {        let ac = UIAlertController(title: webView.title, message: message, preferredStyle: UIAlertControllerStyle.Alert)        ac.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Cancel, handler: { (a) -> Void in            completionHandler()        }))                self.presentViewController(ac, animated: true, completion: nil)    }        //HTML页面弹出Confirm时调用此方法    func webView(webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: (Bool) -> Void) {        let ac = UIAlertController(title: webView.title, message: message, preferredStyle: UIAlertControllerStyle.Alert)        ac.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler:            { (ac) -> Void in                completionHandler(true)  //按确定的时候传true        }))                ac.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler:            { (ac) -> Void in                completionHandler(false)  //取消传false        }))                self.presentViewController(ac, animated: true, completion: nil)    }}

如果你访问的页面的协议是https那么要在info.list同添加以下Key:

<key>NSAppTransportSecurity</key>

<dict>

<key>NSAllowsArbitraryLoads</key>

<true/>

</dict>

具体可参考：https://lvwenhan.com/ios/460.html