UIWebview中的身份验证挑战并在Objective C ios中显示URL

Question

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
    if (!isAuthenticated) {
        isAuthenticated = false;
        NSURL *url = [NSURL URLWithString:@"https://spo.mcd.com/sites/seeit_development3/brand/cognizant-test-brand-05242017"];`

    NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: self delegateQueue: [NSOperationQueue mainQueue]];


    NSURLSessionDataTask * dataTask = [defaultSession dataTaskWithUrl:url
                                                    completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
         if(error == nil) {
         } else {
           NSLog(@"Error: %@", error);
         }
      }];
      [dataTask resume];
      return NO;
   }

   return YES;
}

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential * _Nullable))completionHandler{
    isAuthenticated = true;
        NSURLCredential *cred = [NSURLCredential credentialWithUser:@"UserName"
                                                           password:@"Password"
                                                        persistence:NSURLCredentialPersistenceNone];
        [[challenge sender] useCredential:cred forAuthenticationChallenge:challenge];
        completionHandler(NSURLSessionAuthChallengeUseCredential, cred);
        NSLog(@"Finished Challenge");
}

执行上述操作后，我得到了一个响应，但URL从未在我的WebView中加载。

首先在此网址https://spo.mcd.com/sites/seeit_development3/brand/cognizant-test-brand-05242017中首先显示一个登录屏幕，然后加载网页。

我获得了成功，但如何在Webview中加载此URL。尝试所有类型的ATS权限。没有什么工作