WebViewJavascriptBridge

来源：互联网发布：论网络诈骗的法律规范编辑：程序博客网时间：2024/05/16 15:14

前段时间做h5交互使用了WebViewJavascriptBridge，今天做下整理。

首先确保一份已经配好功能的html文件。（html还在学习阶段，暂时就不卖弄了。。。）

1.初始化一个webview（viewdidload）

<span class="constant">UIWebView</span>* webView = [[<span class="constant">UIWebView</span> alloc] <span class="symbol" style="color: rgb(153, 0, 115);">initWithFrame:</span><span class="keyword" style="font-weight: bold;">self</span>.view.bounds];    [<span class="keyword" style="font-weight: bold;">self</span>.view <span class="symbol" style="color: rgb(153, 0, 115);">addSubview:</span>webView];

2.将此webview与WebViewJavascriptBridge关联（viewdidload）

<span class="keyword" style="font-weight: bold;">if</span> (_bridge) { <span class="keyword" style="font-weight: bold;">return</span>; }<span class="indent">  </span>[WebViewJavascriptBridge enableLogging];<span class="indent">  </span><span class="indent">  </span>_bridge = [WebViewJavascriptBridge bridgeForWebView:webView webViewDelegate:self handler:^(id data, WVJBResponseCallback responseCallback) {<span class="indent">  </span><span class="indent">  </span>NSLog(<span class="variable" style="color: rgb(0, 128, 128);">@"</span>ObjC received message from JS: <span class="variable" style="color: rgb(0, 128, 128);">%@</span><span class="string" style="color: rgb(221, 17, 68);">", data);<span class="indent">  </span><span class="indent">  </span><span class="indent">  </span><span class="indent">  </span>responseCallback(<span class="variable" style="color: rgb(0, 128, 128);">@"</span>Response for message from ObjC"</span>);<span class="indent">  </span>}];

ps：此时你的webview就与js搭上桥了。下面就是方法的互调和参数的互传。

（1） js调oc方法（可以通过data给oc方法传值，使用responseCallback将值再返回给js）

[_bridge registerHandler:<span class="variable" style="color: rgb(0, 128, 128);">@"</span>testObjcCallback<span class="string" style="color: rgb(221, 17, 68);">" handler:^(id data, WVJBResponseCallback responseCallback) {        </span><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;"></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; color: rgb(61, 29, 129);"><span style="color: rgb(0, 0, 0);">        </span><span style="color: rgb(112, 61, 170);">NSData</span><span style="color: rgb(0, 0, 0);"> *jsonData = [data </span>dataUsingEncoding<span style="color: rgb(0, 0, 0);">:</span>NSUTF8StringEncoding<span style="color: rgb(0, 0, 0);">];</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; color: rgb(112, 61, 170);"><span style="color: rgb(0, 0, 0);">        </span>NSDictionary<span style="color: rgb(0, 0, 0);"> *dic = [</span>NSJSONSerialization<span style="color: rgb(0, 0, 0);"> </span><span style="color: rgb(61, 29, 129);">JSONObjectWithData</span><span style="color: rgb(0, 0, 0);">:jsonData</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; color: rgb(61, 29, 129);"><span style="color: rgb(0, 0, 0);">                            </span>options<span style="color: rgb(0, 0, 0);">:</span>NSJSONReadingMutableContainers<span style="color: rgb(0, 0, 0);"> </span>error<span style="color: rgb(0, 0, 0);">:</span><span style="color: rgb(187, 44, 162);">nil</span><span style="color: rgb(0, 0, 0);">];</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;">        </p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;">        [<span style="color: rgb(187, 44, 162);">self</span> <span style="color: rgb(49, 89, 93);">reloadNavgation</span>:dic];     <span style="color: rgb(0, 132, 0);">//</span><span style="line-height: normal; font-family: 'Heiti SC Light'; color: rgb(0, 132, 0);">跳转</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; color: rgb(209, 47, 27);"><span style="color: rgb(0, 0, 0);">        responseCallback(</span>@"Response from iHfPayCalledByJs"<span style="color: rgb(0, 0, 0);">);</span></p><span class="string" style="color: rgb(221, 17, 68);">    }];</span>

这里注意testObjcCallback这个方法的标示。html那边的命名要跟ios这边相同，才能调到这个方法。当然这个名字可以两边商量着自定义。简单明确即可。

（2）oc调js方法（通过data可以传值，通过 response可以接受js那边的返回值）

id data = @{ <span class="variable" style="color: rgb(0, 128, 128);">@"</span>greetingFromObjC<span class="string" style="color: rgb(221, 17, 68);">": <span class="variable" style="color: rgb(0, 128, 128);">@"</span>Hi there, JS!"</span> };    [_bridge callHandler:<span class="variable" style="color: rgb(0, 128, 128);">@"</span>testJavascriptHandler<span class="string" style="color: rgb(221, 17, 68);">" data:data responseCallback:^(id response) {        NSLog(<span class="variable" style="color: rgb(0, 128, 128);">@"</span>testJavascriptHandler responded: <span class="variable" style="color: rgb(0, 128, 128);">%@</span>"</span>, response);    }];

注意这里的 testJavascriptHandler也是个方法标示。

（3）oc给js传值（通过 response接受返回值）

[_bridge <span class="keyword" style="font-weight: bold;">send</span>:<span class="variable" style="color: rgb(0, 128, 128);">@"</span>A string sent from ObjC to JS<span class="string" style="color: rgb(221, 17, 68);">" responseCallback:^(id response) {        NSLog(<span class="variable" style="color: rgb(0, 128, 128);">@"</span>sendMessage got response: <span class="variable" style="color: rgb(0, 128, 128);">%@</span>"</span>, response);    }];

（4）oc给js传值（无返回值）

<span class="title" style="color: rgb(153, 0, 0); font-weight: bold;">[_bridge send:@"A string sent from ObjC after Webview has loaded."]</span><span class="comment" style="color: rgb(153, 153, 136); font-style: italic;">;</span>

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