通常，这个生命周期模型是一个有向图，描述索赔的状态和允许的状态变化。
Typically, this lifecycle model is a directed graph that depicts the life of the claim and the state changes that are allowed.
用迁移可以容易地进行这个变化，因为迁移可以访问对象模型并根据模型的状态进行决策。
You can easily make this change in a migration because the migration has access to model objects and can make logical decisions based on the model's state.
EditPart还观察模型并更新视图，以反映模型状态中的变化。
The EditPart also observes the model, and updates the view to reflect changes in the model's state.
应用推荐