-(void)btn2Clik

{

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

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

    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    webView.delegate = self;

    [webView loadRequest:request];

    [self.view addSubview:webView];

}

   //用UIWebView来实现，打电话结束后会返回当前应用程序：

     UIWebView *callPhoneWebVw = [[UIWebView alloc] init];

     NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"tel://1008611"]];

     [callPhoneWebVw loadRequest:request];  

　　　　[self.view addSubview:callPhoneWebVw];

//1、系统的打电话代码，不返回当前程序：

     [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://1008611"]];