跳转到QQ聊天

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

       NSURL *url = [NSURL URLWithString:@"mqq://im/chat?chat_type=wpa&uin=123456&version=1&src_type=web"];//uin=123456为你要跳转的QQ号码

       NSURLRequest *request = [NSURLRequest requestWithURL:url];

       //    webView.delegate = self;

       [webView loadRequest:request];

       [self.view addSubview:webView];