澄清:MVC，MVP，MVVM [英] Clarification :MVC,MVP,MVVM

问题描述

我正在阅读MVC，MVP，MVVM之间的区别

I am reading the difference between MVC,MVP,MVVM

来源:此处

我的疑问是，图表(MVP)(MVVM)在Modle和Presenter，Model和ViewModel之间显示了双向箭头.

My doubt is ,the diagrams (MVP) (MVVM) show bidirectional arrow between Modle and Presenter,Model and ViewModel.

Presenter和ViewModel显然知道Model，但这是否意味着Model知道Presenter和ViewModel?

Presenter and ViewModel obviously aware of Model.But does it mean Model is aware of Presenter and ViewModel?

推荐答案

Presenter和ViewModel显然知道Model，但这是否意味着Model知道Presenter和ViewModel?

Presenter and ViewModel obviously aware of Model.But does it mean Model is aware of Presenter and ViewModel?

不.至少，按照我看这些模式的方式，模型应该(理想情况下)不知道除自身之外的任何东西.我试图在

No. At least, the way I view these patterns, the Model should (ideally) be unaware of anything except itself. I tried to highlight that in my discussion of MVVM by only showing a uni-directional arrow to the Model.

但是，许多人都使用往返于模型的双向箭头来表示模型引发的事件.这在某种程度上取决于您如何看待-该模型可能需要将自身内的更改通知其他层.取决于语言/框架，这可能看起来像模型与其他层交谈".但是，从模型的角度来看，我会尽量保持完全中立.例如，在C#中，我仅使用一个事件，其中的类型都是特定于Model的.它知道某物"可能正在监听事件，但不知道该某物"的内容.

However, many people use an arrow going both ways to/from the Model to represent events raised by the Model. It somewhat depends on how you see this - the Model will likely need to notify other layers of changes within itself. Depending on the language/framework, this may look like the model "talking" to other layers. However, I try to be very careful to keep this completely neutral from the Model's point of view. For example, in C#, I just use an event, where the types are all Model-specific. It knows "something" may be listening to the event, but does not have any knowledge of what comprises that "something".

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