Question

如果网站不需要身份验证，我的代码可以正常工作，如果确实如此，则在打印“凭据创建”后立即出现EXC_BAD_ACCESS错误。我没有发布任何内容，这些代码直接从文档中复制 - 任何想法是什么问题？

- (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

原来这与特定网站身份验证方法有关 - 将我想要登录的网站替换为其他网站，代码运行正常。

（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但是emhttp所以我假设它与它有关）

Answer 2

你唯一不控制的是[challenge sender]的返回值。尝试打印其描述以确保它是非零的。

didReceiveAuthenticationChallenge导致EXC_BAD_ACCESS

2 个答案: