Flutter Tutorial - Flutter Keys & Unique Key

Published: 14 March 2021
on channel: HeyFlutter․com

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Use the Flutter Unique Key To Preserve the state of Stateful Widgets if they moved around in the Widget tree. The main Flutter Keys are UniqueKey, ValueKey, GlobalKey & ObjectKey.
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RESOURCES
GlobalKey Tutorial:    • Flutter Tutorial - Flutter Keys & Glo...
ValueKey Tutorial:    • Flutter Tutorial - Flutter Keys & Val...
Stateful Widget Lifecycle Tutorial:    • Flutter Tutorial - Stateful Widget Li...
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Migrate App To Null Safety Tutorial:    • Flutter Tutorial - Migrate App To Flu...
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Bar Code Scanner App Tutorial:    • Flutter Tutorial - Barcode Scanner App

TIMELINE
0:00 Introduction Unique Key
0:52 Create Example App
2:41 Stateful Widget Needs Key
3:06 Why Is Key Needed?
3:53 Add Unique Key
4:28 Where To Add Unique?
5:52 Differences Between Unique Key & Value Key

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