贴代码：
@interface UIWebView (JavaScriptAlert) -(void) webView:(UIWebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(id)frame; - (BOOL)webView:(UIWebView *)sender runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(id)frame; @end @implementation UIWebView (JavaScriptAlert) - (void)webView:(UIWebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(id)frame { UIAlertView* customAlert = [[UIAlertView alloc] initWithTitle:@"助手提示" message:message delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil]; [customAlert show]; } static BOOL diagStat = NO; static NSInteger bIdx = -1; - (BOOL)webView:(UIWebView *)sender runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(id)frame { UIAlertView *confirmDiag = [[UIAlertView alloc] initWithTitle:@"助手提示" message:message delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil nil]; [confirmDiag show]; bIdx = -1; while (bIdx==-1) { //[NSThread sleepForTimeInterval:0.2]; [[NSRunLoop mainRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.1f]]; } if (bIdx == 0){//取消; diagStat = NO; } else if (bIdx == 1) {//确定; diagStat = YES; } return diagStat; } - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{ bIdx = buttonIndex; } @end
关于WKWebView:
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：
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//// 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 = "<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
链接：