Cubit<State> class Null safety

A Cubit is similar to Bloc but has no notion of events and relies on methods to emit new states.

Every Cubit requires an initial state which will be the state of the Cubit before emit has been called.

The current state of a Cubit can be accessed via the state getter.

class CounterCubit extends Cubit<int> {
  CounterCubit() : super(0);

  void increment() => emit(state + 1);
}
Inheritance

Constructors

Cubit(State initialState)
A Cubit is similar to Bloc but has no notion of events and relies on methods to emit new states. [...]

Properties

hashCode int
The hash code for this object. [...]
read-only, inherited
isClosed bool
Whether the bloc is closed. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
state → State
The current state.
read-only, inherited
stream Stream<State>
The current state stream.
read-only, inherited

Methods

addError(Object error, [StackTrace? stackTrace]) → void
Reports an error which triggers onError with an optional StackTrace.
@mustCallSuper, inherited
close() Future<void>
Closes the instance. This method should be called when the instance is no longer needed. Once close is called, the instance can no longer be used.
@mustCallSuper, inherited
emit(State state) → void
Updates the state to the provided state. emit does nothing if the state being emitted is equal to the current state. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
onChange(Change<State> change) → void
Called whenever a change occurs with the given change. A change occurs when a new state is emitted. onChange is called before the state of the cubit is updated. onChange is a great spot to add logging/analytics for a specific cubit. [...]
@mustCallSuper, inherited
onError(Object error, StackTrace stackTrace) → void
Called whenever an error occurs and notifies BlocObserver.onError. [...]
@mustCallSuper, @protected, inherited
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited