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flutterflutter-redux

Compare old view model and current view model in Flutter redux


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?

Can I do something like

if(oldViewModel.changedProperty != viewModel.changedProperty)

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


Solution

  • // 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: ),