WKWebView捕獲HTML彈出的Alert和Confirm

時間 2019-11-14

標籤 wkwebview 捕獲 html 彈出 alert confirm 欄目 HTML 简体版

原文原文鏈接

以前用WebView裝載一個網頁時，彈出Alert時會顯示網址，因爲不想把網址暴露給用戶這樣顯示就不是很友好了。UIWebView文檔內沒有找到能夠捕獲這類信息的API。GOOGLE了下發現了WKWebView組件，WKWebView是IOS8新推出的組件，目的是給出一個新的高性能的 Web View 解決方案，擺脫過去 UIWebView 的老舊笨重特別是內存佔用量巨大的問題。如下爲示例代碼：javascript

//
//  ViewController.swift
//  KenWKWebView
//
//  Created by KenNgai on 10/10/15.
//  Copyright © 2015 IT. All rights reserved.
//

import UIKit
import WebKit //導入WebKit  WKWebView應該是用Webkit內核

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 = "<html><title>Dialog</title><style type='text/css'>body{font-size:60px}</style><script type='text/javascript'>function myconfirm(){if(confirm('Star it?')){alert('Done')}}</script><body><a href=\"javascript:alert('Just Alert')\" >Alert</a><br /><a href=\"javascript:myconfirm()\">Logout</a></body></html>"
        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.
    }

}

//捕捉異常信息
private typealias wkNavigationDelegate = ViewController
extension 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 = ViewController
extension wkUIDelegate {
    //HTML頁面Alert出內容
    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頁面彈出Confirm時調用此方法
    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)  //按肯定的時候傳true
        }))
        
        ac.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler:
            { (ac) -> Void in
                completionHandler(false)  //取消傳false
        }))
        
        self.presentViewController(ac, animated: true, completion: nil)
    }
}

若是你訪問的頁面的協議是https那麼要在info.list同添加如下Key:css

<key>NSAppTransportSecurity</key>
    <dict>
        <key>NSAllowsArbitraryLoads</key>
        <true/>
    </dict>html

具體可參考：https://lvwenhan.com/ios/460.htmljava

相關標籤/搜索

wkwebview+uitableview

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