GDataXMLDocument *docXML = [GDataXMLDocument alloc] initWithData:dataXML options:0 error:nil];
NSString *responseOrder = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
NSDictionary *content = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
AFNetwork 能解的数据格式有限，对于奇葩的后台，有时自己解反而好点
