ios - UIWebview didReceiveAuthenticationChallenge

Question

我正在使用 webview 加载网站。我设法运行了这些应用程序。但我的问题是，如果我传递了错误的密码，我将无法加载网站，它只会显示白屏。

如果我传递正确的用户名/密码，它将加载该网站。有没有办法处理我的身份验证用户名/密码正确或错误？

我正在使用这段代码。

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodNTLM])
{
    NSURLCredential *credentail = [NSURLCredential
                                   credentialWithUser:@"username" 
                                   password:@"Password"
                                   persistence:NSURLCredentialPersistenceForSession];
    [[challenge sender] useCredential:credentail forAuthenticationChallenge:challenge];
}}

正确的用户名和密码包含在上面的代码中。如果我将用户名更改为“user”或密码更改为“pass”，我将无法加载该网站。如何捕获身份验证错误？

谢谢。

Answer 1

我刚找到。只需要再添加 1 个验证。 [[challenge previousFailureCount] == 0. 这是代码。

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
//receive a authenticate and challenge with the user credential
if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodNTLM] &&
    [challenge previousFailureCount] == 0)
{
    NSURLCredential *credentail = [NSURLCredential 
                                   credentialWithUser:@"username" 
                                   password:@"password"
                                   persistence:NSURLCredentialPersistenceForSession];


    [[challenge sender] useCredential:credentail forAuthenticationChallenge:challenge];
}
else 
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error Message" message:@"Invalid credentails" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
    [alert release];
}
}

谢谢。 :)