launchWhenLifecycleStateDestroyed<T> method

Future<T> launchWhenLifecycleStateDestroyed<T>({
  1. bool runWithDelayed = false,
  2. Cancellable? cancellable,
  3. required FutureOr<T> block(
    1. Cancellable cancellable
    ),
})

Implementation

Future<T> launchWhenLifecycleStateDestroyed<T>(
    {bool runWithDelayed = false,
    Cancellable? cancellable,
    required FutureOr<T> Function(Cancellable cancellable) block}) {
  Completer<T> completer = Completer.sync();
  addLifecycleObserver(LifecycleObserver.stateChange((state) {
    if (state == LifecycleState.destroyed &&
        !completer.isCompleted &&
        cancellable?.isUnavailable != true) {
      completer.complete(block(cancellable ?? Cancellable()));
    }
  }));
  return completer.future;
}