iOS跳转到qq聊天界面

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectZero];

        NSURL *url = [NSURL URLWithString:@"mqq://im/chat?chat_type=wpa&uin=315778372&version=1&src_type=web"]

        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        webView.delegate = self;
        [webView loadRequest:request];

        [self.view addSubview:webView];