FLUTTER SCAFFOLD KEY HOW TO

So that, when we want to display a SnackBar, we can access the Scaffold current state using the _scaffoldKey. To hold a global key for this Scaffold state, we shall create a final variable named _scaffoldKey and assign this to the key of Scaffold. Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

To show a persistent bottom sheet, use the Scaffold.bottomSheet. Shows a Material Design bottom sheet in the nearest Scaffold. Note that when you're 'returning' a Widget from a build function it becomes a child. Scaffold on TOP of the Navigator) should do the trick. Wrapping your Navigator with your Scaffold (i.e. If you don't have that Scaffold on your page there is no app bar. Global key usually use to change parent widget from any portion of app considering state unchanged. keys also store and restore the current scroll position in a list of widgets. We need to have the current state of our Scaffold to display the SnackBar in it. Whether to show a ModalBarrier over the body of the scaffold. The app bar is part of the Scaffold which will appear only on the 4 widgets In widgetOptions. Explicitly setting a key to a widget helps Flutter understand which widget it needs to update when state changes.

FLUTTER SCAFFOLD KEY HOW TO

In this tutorial, we will learn how to display a SnackBar in the Scaffold of your Flutter Application. After such default or specified period of time, the SnackBar is deleted.īy default, SnackBar slides from the bottom of the screen, stays there for some time, and then slides down till it disappears.

BuildContext concontext final snackBar SnackBar(content: Text(message)) Scaffold.of(con). In mobile applications, SnackBar can be used to display a message to user for a brief period of time. Inside Scaffold parent, you can do like below.

Flutter scaffold key