两句话跳转QQ聊天界面 通过web方式

NSString *qq=[NSString stringWithFormat:@"mqq://im/chat?chat_type=wpa&uin=%@&version=1&src_type=web",@"11027037153"]; ???NSURL *url2 = [NSURL URLWithString:qq]; ???if (![[UIApplication sharedApplication] canOpenURL:url2]) { ???????[[UIApplication sharedApplication] openURL:url2]; ???}else{ ???????UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"对不起，您还没安装QQ" preferredStyle:UIAlertControllerStyleAlert]; ???????????????UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) { ???????????return ; ???????}]; ???????[alertController addAction:cancelAction]; ???????[self presentViewController:alertController animated:YES completion:nil]; ???}