無法識別AFHTTPRequestOperation選擇器錯誤setAuthenticationAgainstProtectionSpaceBlock：

Question

我想在IOS中運行下面的代碼。

AFHTTPRequestOperation *requestOperation = [self.httpClient HTTPRequestOperationWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.url.text]] 
             success:^(AFHTTPRequestOperation *operation, id responseObject) { 
              NSLog(@"reply data = %@", [[NSString alloc] initWithData:operation.responseData encoding:NSUTF8StringEncoding]); 
             } 
             failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
              NSLog(@"%@", error); 
             }]; 
[requestOperation setAuthenticationAgainstProtectionSpaceBlock:^BOOL(NSURLConnection *connection, NSURLProtectionSpace *protectionSpace) { 
    return YES; 
}]; 

然後我得到這樣一個錯誤：

- [AFHTTPRequestOperation setAuthenticationAgainstProtectionSpaceBlock：]：無法識別的選擇發送到實例0x75a81f0

至於我可以看到該塊，我傳球有正確的返回類型和參數。我在這裏做錯了什麼？

Answer 1

AFURLRequestOperation根據是否定義了_AFNETWORKING_PIN_SSL_CERTIFICATES_，使用某些可用的代理回調方法進行條件編譯。

如果是（這是從CocoaPods安裝時的默認值），setWillSendRequestForAuthenticationChallengeBlock:將可用。否則setAuthenticationAgainstProtectionSpaceBlock:和setAuthenticationChallengeBlock:將可用。

setWillSendRequestForAuthenticationChallengeBlock對應於connection:willSendRequest:forAuthenticationChallenge:，它是the preferred delegate method to handle challenges。