iOS之UIWebView无法获取web标题的解决方法

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
  // 取加载html文件的标题名
  NSString *title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
}

 $.ajax({
    url: remoteur+'/api/innerMessageApi/noticeMessage.htm?callBackFunc=xx',
    type: 'get',
    dataType: 'jsonp',
    jsonpCallback:"xx",
    data: {msgId: msgId},

    success: function(res){
      console.log(res);
      if ( res.successFlag == 'Y' ){
        content = res.content;
        title  = res.title;
      }
    },
    complete:function(res){
      document.title = title;
      $('body').append(content);
    }
  })

  dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(3 * NSEC_PER_SEC)),    

  dispatch_get_main_queue(), ^{
    self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
  });

$.ajax({
    url: remoteur+'/api/innerMessageApi/noticeMessage.htm?callBackFunc=xx',
    type: 'get',
    dataType: 'jsonp',
    jsonpCallback:"xx",
    data: {msgId: msgId},
    // 设置同步操作
    async: false,

    success: function(res){
      // 同步设置标题
       document.title = res.title;
    complete:function(res){
      ...
    }
  })

$.ajax({
    url: remoteur+'/api/innerMessageApi/noticeMessage.htm?callBackFunc=xx',
    type: 'get',
    dataType: 'jsonp',
    jsonpCallback:"xx",
    data: {msgId: msgId},
    // 设置同步操作
    async: false,

    success: function(res){
      // 同步设置标题
      document.title = res.title;
      // js调用原生方法来设置标题
      setWebViewTitle(title); 
    complete:function(res){
      ...
    }
  })

  context[@"setWebViewTitle"] = ^(){
    NSArray *args = [JSContext currentArguments];
    if (args.count == 1) {
      // 设置标题，只需要传递一个参数
      self.title = [args firstObject];
    }
  };