State doesn't rebuild after new item is added to list Flutter-CodePudding

I'm building a Notes app and when I try to add data to the noteslist from another screen it doesn't update the UI in the main screen until I restart the app. Is there a way to track this change and force the app to rebuild that state in flutter.

CodePudding user response：

if you use StatefulWidget you can try add this code at the end of the function that you use to get the data to refresh the state.

setState(() {});

Or even better if you can share the code that you're trying to troubleshoot.

CodePudding user response：

if you want to update state when add item to list, you need to create new list instance, like:

final newList = [...yourList];
final newList.addItem(item);
setState(() {});