Kas saaksid loetleda Flutteris kasutatavaid võtmetüüpe, mida kasutatakse vidinate haldamiseks?

In Flutter, the following types of keys are used for state management and widget identification:

• GlobalKey — a unique key that allows access to a widget's state from anywhere in the application. Used when you need to preserve state or manage a widget outside its context.

• LocalKey — a base class for keys that are unique within a single parent. Includes:

  • ValueKey<T> — a key based on a value (e.g., string, number), useful for identifying widgets with a specific value.
  • ObjectKey — a key based on an object, comparing objects by reference.

• UniqueKey — generates a unique key that always differs from others. Used when you want to guarantee that a widget will be recreated.

Example of using ValueKey:

ListView(
  children: items.map((item) => ListTile(
    key: ValueKey(item.id),
    title: Text(item.name),
  )).toList(),
)