在Objective-C中，JSON映射到模型映射。

I am trying to map the JSON I received to a model object in Objective-C.Before I always used ObjectMapper when I coded in swift. I can't seem to grasp the steps I need to go through to achieve the same kind of result when I used ObjectMapper.The problem is when using ObjectMapper you write the code where the mapping happens inside the model class such as;I am trying to map the JSON I received to a mod