iOS AFNetworking在何处放置setWillSendRequestForAuthenticationChallengeBlock on操作

im使用AFNetworking 2，如何设置setWillSendRequestForAuthenticationChallengeBlock以在质询时发送证书

NSString *url = [NSString stringWithFormat:@"%@%@", API_URL_ROOTV1, API_URL_HUBA];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]];
[request setHTTPMethod:@"GET"];

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setWillSendRequestForAuthenticationChallengeBlock:^(NSURLConnection *connection, NSURLAuthenticationChallenge *challenge) {

}];

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

}];

[operation start];

在我试图调用

setWillSendRequestForAuthenticationChallengeBlock

的文件中：

我知道cocoapods已经在Pods-prefix.pch中定义了#define，不希望再次定义它

它可能会帮助你

#define _AFNETWORKING_PIN_SSL_CERTIFICATES_