iphone - didReceiveAuthenticationChallenge 导致 EXC_BAD_ACCESS

Question

如果网站不需要身份验证，我的代码可以正常工作，如果需要，则在打印“已创建凭据”后会立即出现 EXC_BAD_ACCESS 错误。我不会发布任何内容，并且此代码是直接从文档中复制的 - 知道出了什么问题吗？

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
 if ([challenge previousFailureCount] == 0)
 {
  NSLog(@"received authentication challenge");

  NSURLCredential *newCredential;
  newCredential=[NSURLCredential credentialWithUser:@"root"
             password:@"rootpassword"
             persistence:NSURLCredentialPersistenceForSession];


  NSLog(@"credential created");

  [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];

  NSLog(@"responded to authentication challenge");

 }
 else
 {
  NSLog(@"previous authentication failure");

  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Authentication Failure" 
              message:@"Website did not accept the username and password."
                delegate:nil
             cancelButtonTitle:@"OK" 
             otherButtonTitles:nil];
  [alert show];
  [alert release];
 }
}

Answer 1

事实证明，这与特定网站的身份验证方法有关 - 将我要登录的网站替换为另一个网站，代码工作正常。

(我试图从 unRaid 的状态页面抓取数据，unRaid 不使用实际的网络服务器，而是使用 emhttp，所以我假设这与它有关)