在Flutter Redux中比较旧视图模型和当前视图模型 [英] Compare old view model and current view model in Flutter redux

问题描述

在Flutter-redux中，我们可以使用onDidChange和onWillChange来检测存储状态的变化.但是有办法检测特定属性的变化吗?

In Flutter-redux, we can use onDidChange and onWillChange to detect changes in store state. But is there a way to detect change in particular properties?

我可以做类似的事情

if(oldViewModel.changedProperty != viewModel.changedProperty)

在react-redux中，可以检查prevProps和currProps的差异，并据此执行操作.

In react-redux, prevProps and currProps can be checked for differences and perform action based on that.

推荐答案

// As a performance optimization, the Widget can be rebuilt only when the
// [ViewModel] changes. In order for this to work correctly, you must
// implement [==] and [hashCode] for the [ViewModel], and set the [distinct]
// option to true when creating your StoreConnector.

StoreConnector<AppState, AppState>(
              distinct: true,
              converter: (store) => store.state,
              builder: ),

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