iOS：如何向我的NSURL代码添加凭据？

Question

I'm trying to access a page that has xml I'm trying to parse. I'm using the following code which works as long as I do not need credentials. How can I add credentials to this code?

NSURL *url = [[NSURL alloc] initWithString:URLPath];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url];

[xmlParser setDelegate: self];
success = [xmlParser parse];

Above my "URLPath" is my url string. I've tried using the following url path format but it doesn't work for me. http://username:password@mypage.com/path/to/file.aspx?Function=Update

Thanks!

Answer 1

Use the NSURLConnectionDelegates

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
    if ([challenge previousFailureCount] == 0) {
        NSLog(@"received authentication challenge");
        NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"USER"
                                                                    password:@"PASSWORD"
                                                                 persistence:NSURLCredentialPersistenceForSession];
        NSLog(@"credential created");
        [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
        NSLog(@"responded to authentication challenge");    
    }
    else {
        NSLog(@"previous authentication failure");
    }
}

See NSURLConnection and Basic HTTP Authentication in iOS for more information