UseState<T> class

A ReactterHook that manages a state.

Contains a value of type T which represents the current state.

When value is different to previous state, UseState execute update to notify container instance that has changed and in turn executes onWillUpdate and onDidUpdate.

This example produces one simple UseState:

class AppController {
  late final likesCount = UseState(0, this);
  late final followed = UseState(false, this);
  late final text = UseState("", this);
  late final user = UseState<User?>(null, this);
  late final posts = UseState(<Post>[], this);

  AppController() {
    likesCount.value += 1;
    followed.value = followed.value!;
    text.value = "This is a text";
    user.value = User(name: "name");

    // It's need to force [update] because mantain the previous state
    // and the [context] not aware that this state has changed
    posts.update(() {
      posts.value.add(
          Post(
            user: user.value,
            text: text.value,
          ),
        );
    });
  }
}
Inheritance

Constructors

UseState(T initial)

Properties

$ → _HookRegister
This variable is used to register ReacttrHook and attach the ReactterState that are defined here.
final
hashCode → int
The hash code for this object.
no setterinherited
initial ↔ T
The initial value in state.
getter/setter pair
instanceAttached → Object?
no setterinherited
isDisposed → bool
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
value ↔ T
Get current value state
getter/setter pair

Methods

attachTo(Object instance) → void
Attaches an object instance to this state.
inherited
createState() → void
Adds the current state to a list if instances of the Reactter class are being built.
inherited
detachInstance() → void
Detaches an object instance to this state.
inherited
dispose() → void
Called when this object is removed
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
refresh() → void
Forces update and notifies to listeners that it did update
inherited
reset() → void
Reset the state to initial value
toString() → String
A string representation of this object.
inherited
update([covariant Function? callback]) → void
Executes callback, and notify the listeners about to update.
inherited
updateAsync([covariant Function? callback]) → Future<void>
Executes callback, and notify the listeners about to update as async way.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited