IOS、HTML5、JavaScript 間の対話命令

//首先导入#import "WebViewJavascriptBridge.h"文件
//第一步：开启日志
 
// 开启日志，方便调试
[WebViewJavascriptBridge enableLogging];
 
//第二步：给ObjC与JS建立桥梁
 
// 给哪个webview建立JS与OjbC的沟通桥梁
self.bridge = [WebViewJavascriptBridgebridgeForWebView:webView];
 
// 设置代理，如果不需要实现，可以不设置
[self.bridgesetWebViewDelegate:self];
 
//第三步：注册HandleName，用于给JS端调用iOS端
 
// JS主动调用OjbC的方法
// 这是JS会调用getUserIdFromObjC方法，这是OC注册给JS调用的
// JS需要回调，当然JS也可以传参数过来。data就是JS所传的参数，不一定需要传
// OC端通过responseCallback回调JS端，JS就可以得到所需要的数据
[self.bridgeregisterHandler:@"getUserIdFromObjC"handler:^(id data, WVJBResponseCallback responseCallback) {
    NSLog(@"js call getUserIdFromObjC, data from js is %@", data);
    if (responseCallback) {
      // 反馈给JS
      responseCallback(@{@"userId": @"123456"});
    }
}];
  
[self.bridgeregisterHandler:@"getBlogNameFromObjC"handler:^(id data, WVJBResponseCallback responseCallback) {
    NSLog(@"js call getBlogNameFromObjC, data from js is %@", data);
    if (responseCallback) {
      // 反馈给JS
      responseCallback(@{@"blogName": @"星仔"});
    }
}];
 
//第四步：直接调用JS端注册的HandleName
 
[self.bridgecallHandler:@"getUserInfos"data:@{@"name": @"ddsds"}responseCallback:^(id responseData) {
    NSLog(@"from js: %@", responseData);
}];

<script>
      window.onerror = function(err) {
        log(&#39;window.onerror: &#39; + err)
      }
    
      /*这段代码是固定的，必须要放到js中*/
      function setupWebViewJavascriptBridge(callback) {
        if (window.WebViewJavascriptBridge) { return callback(WebViewJavascriptBridge); }
        if (window.WVJBCallbacks) { return window.WVJBCallbacks.push(callback); }
        window.WVJBCallbacks = [callback];
        var WVJBIframe = document.createElement(&#39;iframe&#39;);
        WVJBIframe.style.display = &#39;none&#39;;
        WVJBIframe.src = &#39;wvjbscheme://__BRIDGE_LOADED__&#39;;
        document.documentElement.appendChild(WVJBIframe);
        setTimeout(function() { document.documentElement.removeChild(WVJBIframe) }, 0)
      }
    
      /*与OC交互的所有JS方法都要放在此处注册，才能调用通过JS调用OC或者让OC调用这里的JS*/
      setupWebViewJavascriptBridge(function(bridge) {
       var uniqueId = 1
       function log(message, data) {
         var log = document.getElementById(&#39;log&#39;)
         var el = document.createElement(&#39;div&#39;)
         el.className = &#39;logLine&#39;
         el.innerHTML = uniqueId++ + &#39;. &#39; + message + &#39;:<br/>&#39; + JSON.stringify(data)
         if (log.children.length) {
            log.insertBefore(el, log.children[0])
         } else {
           log.appendChild(el)
         }
       }
       /* Initialize your app here */
       
       /*我们在这注册一个js调用OC的方法，不带参数，且不用ObjC端反馈结果给JS：打开本demo对应的博文*/
     bridge.registerHandler(&#39;openWebviewBridgeArticle&#39;, function() {
         log("openWebviewBridgeArticle was called with by ObjC")
     })
      /*JS给ObjC提供公开的API，在ObjC端可以手动调用JS的这个API。接收ObjC传过来的参数，且可以回调ObjC*/-
      bridge.registerHandler(&#39;token&#39;, function(data, responseCallback) {
         log("G星爷: ", data)
       responseCallback({这里给我返回拼接后的地址})
     })
      /*JS给ObjC提供公开的API，ObjC端通过注册，就可以在JS端调用此API时，得到回调。ObjC端可以在处理完成后，反馈给JS，这样写就是在载入页面完成时就先调用*/
       bridge.callHandler(&#39;getUserIdFromObjC&#39;, function(responseData) {
        log("JS call ObjC&#39;s getUserIdFromObjC function, and js received response:", responseData)
      })
       document.getElementById(&#39;blogIds&#39;).onclick = function (e) {
         log(&#39;js call objc: getBlogNameFromObjC&#39;)
         bridge.callHandler(&#39;ww&#39;, {&#39;blogdURL&#39;: &#39;weidsfdl&#39;}, function(response) {
                          log(&#39;JS got response&#39;, response)
                          })
       }
     })
       
    </script>

- (void)webViewDidFinishLoad:(UIWebView *)webView{
    // 禁用 页面元素选择
    [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitUserSelect='none';"];
    
//     禁用 长按弹出ActionSheet
    [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitTouchCallout='none';"];
}