AFN拿不到cookie,无法存储cookie

跟雅思的项目对比，发现

task.currentRequest.allHTTPHeaderFields

这样不能拿到cookie

应该这样取：

NSHTTPURLResponse *response = (NSHTTPURLResponse *)task.response;

        NSDictionary *fileds = response.allHeaderFields;//task.currentRequest.allHTTPHeaderFields;//[operation.response allHeaderFields];

        NSURL *cookieUrl = [NSURL URLWithString:baseUrl];

        NSArray *cookieArray = [NSHTTPCookie cookiesWithResponseHeaderFields:fileds forURL:cookieUrl];