ios app内跳转到手机qq聊天界面

       _webView = [[UIWebViewalloc]initWithFrame:CGRectZero];

      [self.viewaddSubview:_webView];

  NSURL *url = [NSURLURLWithString:@"mqq://im/chat?

chat_type=wpa&uin=需要跳转的QQ号&version=1&src_type=web"];

    NSURLRequest *request = [NSURLRequestrequestWithURL:url];

    _webView.delegate =self;

    [_webViewloadRequest:request];