登錄谷歌下載文件 - ios

Question

我試圖從googletrends下載文件。爲了做到這一點，我必須登錄。我使用NSURLConnection，所以我認爲我必須使用

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

我必須設置什麼參數？即如何定義用戶名和密碼？

Answer 1

使用NSURLCredential傳遞的用戶名和密碼：

- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge 
{ 
    NSURLCredential *credential = [NSURLCredential credentialWithUser:userName password:userPassword persistence:NSURLCredentialPersistenceForSession]; 

    [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge]; 
} 

請查看本教程：Handling URL Authentication challenges