Keys in Flutter
- Introduction to Keys
- Keys are used to identify specific widgets in a widget tree, helping in managing the state of a widget even when it's reordered or placed on multiple screens.
- Use Case for Keys
- Keys can be used to maintain the state of widgets in scenarios like reordering widgets, updating counter texts, and managing state across multiple screens.
- Demo Code Overview
- Code example with MyWidget showing incorrect behavior due to lack of unique keys.
- Types of Keys
- Global Key: Used to maintain the same state for a shared widget across screens.
- Object Key: Identifies widgets based on a combination of different values.
- Unique Key: Used when no exact criteria for uniqueness exists, but widget must still be unique.
