WKWebView解决alert 问题

• WKWebView加载页面, 当页面使用alert()、confirm()和prompt(),默认无响应. 若要正常使用这三个方法，需要实现WKUIDelegate中的三个方法模拟JS的这三个方法

JS 解决实现方法function showAlert() {     alert("js_alertMessage");}function showConfirm() {     confirm("js_confirmMessage");}function showPrompt() {     prompt("js_prompt", "js_prompt_defaultMessage");} App 解决//! alert(message)- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {     completionHandler();}//! confirm(message)- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler {     completionHandler();}//! prompt(prompt, defaultText)- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString *))completionHandler {      completionHandler();}

注意: completionHandler();需要被执行, 不然会引发crash.

WKWebView解决window.open问题

• 1. WKWebView加载页面, 当页面使用window.open跳转时候, 无响应, 需要实现WKUIDelegate协议实现

-(WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{    WKFrameInfo *frameInfo = navigationAction.targetFrame;    if (![frameInfo isMainFrame]) {         //1. 本页跳转        [webView loadRequest:navigationAction.request];        //2. 获取url 打开新的 vc 实现跳转到新页面        //NSString *urlStr = [[navigationAction.request URL] absoluteString];    }    return nil;}

注意 :
1- 使用 window.open 在手机端可能引发兼容问题, 建议前台对手机端标签使用location.href解决
2- ajax 解决window.open时候, 同步时可以响应跳转, 异步时不会响应跳转

$.ajax({      url: '',      async: true,      complete: function (xhr) {                    window.open("http://www.baidu.com");      }                   });

WKWebView解决a标签问题

• 1. WKWebView加载页面, 当页面使用a标签跳转时 跳转方式 (1)本页跳转target="_self", webview可以正常跳转; (2)新页面跳转target="_blank", webview无响应, 需要进行解决, 才能跳转

 方案1: 不建议使用- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation{    // 将a标签 跳转方式一律改为本页    [webView evaluateJavaScript:@"var aArr = document.getElementsByTagName('a');for(var i=0;i<aArr.length;i++){aArr[i].setAttribute('target','');}" completionHandler:nil];}

方案2: WKNavigationDelegate协议实现-(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{    // webview 本页重新加载    if (navigationAction.targetFrame == nil) {        [webView loadRequest:navigationAction.request];    }    decisionHandler(WKNavigationActionPolicyAllow);    return;}

方案3: WKUIDelegate协议实现-(WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{    WKFrameInfo *frameInfo = navigationAction.targetFrame;    if (![frameInfo isMainFrame]) {     // 可创立新页面打开 [WebView new]     // 也可重新加载本页面 [webView loadRequest:navigationAction.request];         }    return nil;}

注意 : 假如方案2与方案3 代码中均实现, 程序会先执行方案2

WKWebView与JS简单交互

-WKWebView加载页面, 当需要给js简单交互, 可如下解决

// JS 解决document.getElementById("btn").onclick =  function () {                    var url = "APP://action?params";    window.location.href = url;}// App 解决-(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{    if ([navigationAction.request.URL.scheme caseInsensitiveCompare:@"APP"] == NSOrderedSame) {        // 进行业务解决        decisionHandler(WKNavigationActionPolicyCancel);    }else{         if (navigationAction.targetFrame == nil) {             [webView loadRequest:navigationAction.request];         }         decisionHandler(WKNavigationActionPolicyAllow);    }    return;}

// App 解决NSString *func = [NSString stringWithFormat:@"loadData('%@', '%@')", @"aaa", @"bbb"];[webView evaluateJavaScript:func completionHandler:nil];// JS 解决function loadData(action, params){                    document.getElementById("returnValue").innerHTML = action + '?' + params;}

注意:
1 webView调用 evaluateJavaScript:completionHandler:方法, 要确保前台的JS方法不在闭包中, 如window.onload = function() {} 中的方法就无法调用.
2 假如交互复杂 可以使用 WebViewJavascriptBridge 实现

以 上 !