+ (void (^)(NSURLSessionDataTask * task, id returnData))successCallBack:(void (^)(id returnData))successBlock{
return ^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
if (!successBlock) return ;
successBlock([NSDictionary replaceNullValueDictionary:[NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil]]);
};
}
虽然AFNetwork有返回解析，但是会不准，一般是自己来解析，加多这一句
[NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil]
因为从断点可以看出
responseObject其实是Data类型，必须要转，否则不能直接用
