Cocoa NSURLConnection委托不'；无法在服务器状态401上获取其didReceiveAuthenticationChallenge方法

我已经设置了一个简单的NSURLConnection来查询http服务器

GET /path HTTP/1.1
Host: 192.168.1.161:8282
User-Agent: NetTest1.0 CFNetwork/441.0.2 Darwin/9.6.0
Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
Pragma: no-cache
Connection: keep-alive

服务器以代码401和WWW认证头集进行响应

HTTP/1.1 401
Connection: close
Pragma: no-cache
Expires: Thu, 01 Dec 1994 16:00:00 GMT
Cache-control: no-cache
Cache-last-checked: Thu, 01 Dec 1994 16:00:00 GMT
Last-modified: Tue, 07 Apr 02009 22:55:48 CEST
Content-type: text/html; charset=iso-8859-1
WWW-Authenticate: Basic realm:

我想这会向我的代理的连接发送一条消息：didReceiveAuthenticationChallenge:method，但它不会

我还实现了

- (BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection {
  return FALSE;
}

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只是为了确保它不会尝试从我的密钥链发送缓存凭据，它不会。WWW-Authenticate标头的格式不正确，请尝试：

WWW-Authenticate: Basic realm="My Realm"

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WWW身份验证标头的格式不正确，请尝试：

WWW-Authenticate: Basic realm="My Realm"