PageStorageKey<T> class
A Key that can be used to persist the widget state in storage after the destruction and will be restored when recreated.
Each key with its value plus the ancestor chain of other PageStorageKeys need to be unique within the widget's closest ancestor PageStorage. To make it possible for a saved value to be found when a widget is recreated, the key's value must not be objects whose identity will change each time the widget is created.
See also:
- PageStorage, which manages the data storage for widgets using PageStorageKeys.
Constructors
- PageStorageKey(T value)
-
Creates a ValueKey that defines where PageStorage values will be saved.
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value → T
-
The value to which this key delegates its operator==
finalinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited