BaseModel

fillModel 子类继承此类,请求数据后填充Dictionary即可

忽略服务器传回的null字段.

为防止id和description与NSObject自带字段重复.重新命名为类名+id/description

调试时po+model实例名可以直接输出description

比如 CouponModel继承于BaseModel

CouponModel *model = [[CouponModel alloc] init];

[model fillModelWithDict:responseobj];

或者

CouponModel *model = [[CouponModel alloc] initWithDic:responseobj];