Object2Dictionary:对象转字典，对象转json

Object2Dictionary 对象转字典，对象转json -------------- 自定义对象 e.g. -------------- Header * header=[[Header alloc] init]; header.code=@"200"; header.message=@"成功"; Body * body=[[Body alloc] init]; body.content=@"content"; body.isFollow=YES; body.followCount=100; Response *rsp=[[Response alloc] init]; rsp.header=header; rsp.body=body; ------------------------