CGRect screenFrame = [[UIScreen mainScreen] bounds];
    webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 38.0, screenFrame.size.width, (screenFrame.size.height-122.0))];
    
    NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];
    
    NSURLRequest *req = [NSURLRequest requestWithURL:url];
    [webView setScalesPageToFit:YES];
    
    
    _bridge = [WebViewJavascriptBridge bridgeForWebView:webView webViewDelegate:self handler:^(id data, WVJBResponseCallback responseCallback) {
        // NSLog(@"ObjC received message from JS: %@", data);
        
        responseCallback(@"Response for message from ObjC");
    }];

    
    webView.delegate = self;
    [webView loadRequest:req];

WebViewJavascriptBridge