Question

我使用以下代码来验证用户使用远程服务器的认证。如果我给出正确的用户名和密码, 没有问题, 因为认证正在发生, 我正从服务器收到回复。

但当我给错误的证明书时, 这种方法被反复使用, 所以我无法打破它。

请帮助我,如何打破它这样我就可以显示认证失败的警告信息。

- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{

    NSURLCredential *credential = [NSURLCredential credentialWithUser:@"username"
                                                             password:@"password"
                                                          persistence:NSURLCredentialPersistenceForSession];
    [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];    
}

Answer 1

试试这个

- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
        {

        if ([challenge previousFailureCount] > 0) {
                // do something may be alert message
            } 
        else
        {

            NSURLCredential *credential = [NSURLCredential credentialWithUser:@"username"
                                                                     password:@"password"
                                                                  persistence:NSURLCredentialPersistenceForSession];
            [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge]; 
        }

}

Answer 2

您需要检查错误计数并适当取消认证挑战 :

if ([challenge previousFailureCount]) {
    [[challenge sender] cancelAuthenticationChallenge:challenge];
} else {
    [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
}

友情链接