// 1.新建WebView
self.webView = [[UIWebView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:self.webView];

// 2.加载网页
NSString *indexPath = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];
NSString *appHtml = [NSString stringWithContentsOfFile:indexPath encoding:NSUTF8StringEncoding error:nil];
NSURL *baseUrl = [NSURL fileURLWithPath:indexPath];
[self.webView loadHTMLString:appHtml baseURL:baseUrl];

// 3.开启日志
[GCWebviewJSBridge setEnableLogging];

// 4.给webView建立JS和OC的沟通桥梁
_bridge = [GCWebviewJSBridge bridgeForWebView:self.webView];
[_bridge setwebViewDelegate:self];

// 这段代码是固定的，必须要放到js中
function setupWebViewJavascriptBridge(callback) {
   //Android
   if (window.GCWebviewAndroidJSBridge) {
       callback(GCWebviewAndroidJSBridge)
   } else {
       document.addEventListener(
         ‘GCWebviewAndroidJSBridgeReady‘
         , function() {
         callback(GCWebviewAndroidJSBridge)
         },
         false
     );
   }

   //iOS
   if (window.GCWebviewJSBridge) {
       return callback(GCWebviewJSBridge);
   }
   if (window.KBWVJSBCallBacks) {
       return window.KBWVJSBCallBacks.push(callback);
   }
   window.KBWVJSBCallBacks = [callback];
   var GCWVJSBIframe = document.createElement(‘iframe‘);
   GCWVJSBIframe.style.display = ‘none‘;
   GCWVJSBIframe.src = ‘gcwvjsbscheme://__GC_BRIDGE_LOADED__‘;
   document.documentElement.appendChild(GCWVJSBIframe);
   setTimeout(function() { document.documentElement.removeChild(GCWVJSBIframe) }, 0);
}

[_bridge registerObjCHandler:@"openCamera" handler:^(id data, GCWVJSBResponseCallback responseCallback) {
    NSLog(@"需要%@图片", data[@"count"]);
    UIImagePickerController *imageVC = [[UIImagePickerController alloc] init];
    imageVC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentViewController:imageVC animated:YES completion:nil];
}];

bridge.callHandler(‘openCamera‘, {‘count‘:‘10张‘}, function responseCallback(responseData) {
   console.log("OC中返回的参数:", responseData)
});

/* JS给OC提供公开的API, 在OC中可以手动调用此API, 并且可以接收OC中传过来的参数,同时可回调OC */
// 获取用户信息
bridge.registerHandler(‘getUserInfo‘, function(data, responseCallback) {
   console.log("OC中传递过来的参数:", data);
   // 把处理好的结果返回给OC
   responseCallback({"userID":"DX001", "userName":"旋之华", "age":"18", "otherName":"旋之华"})
});

// 调用JS中的API
[self.bridge callHandler:@"getUserInfo" data:@{@"userId":@"DX001"} responseCallback:^(id responseData) {
    NSString *userInfo = [NSString stringWithFormat:@"%@,姓名:%@,年龄:%@", responseData[@"userID"], responseData[@"userName"], responseData[@"age"]];
}];