AFNetworking获取HTTP header

if ([task.response isKindOfClass:[NSHTTPURLResponse class]]) {
    NSHTTPURLResponse *response = (NSHTTPURLResponse *)task.response;
    NSLog(@"%@",[response allHeaderFields]);
    
}

获取Header里面的时间

NSString *dateServer = [response allHeaderFields][@"Date"];

将Header里面的时间处理成我们需要的格式

if ([task.response isKindOfClass:[NSHTTPURLResponse class]]) {
            NSHTTPURLResponse *response = (NSHTTPURLResponse *)task.response;
            
            NSLog(@"%@",[response allHeaderFields]);
            NSString *dateServer = [response allHeaderFields][@"Date"];
            NSDate* inputDate = [TimeTools  dateFromRFC822String:dateServer];
            dateServer = [TimeTools changeDateToDateString:inputDate];
            
        }

MWFeedParser