Lifecycle

Concepts

• The actual entry point to the screen.

• It acts as the Presenter in the MVP.

• Create it on a per-screen basis.

• We call it Lifecycle because it's associated with the lifetime of the screen.

• Create only one on a screen. (no exceptions).

Implementation policy

• The constructor is only responsible for getting a reference to each class imported from the LifetimeScope (it doesn't do any other complicated processing)

• Before switching screens WillPushEnterAsync we do the following

  • Create a Model.

  • Initialize the View (pass the created model to the View).

• After switching screens DidPushEnter Subscribe to handling the View button in *. If you enable button handling after screen transitions, button input events will not be fired during transitions (button presses during transitions can be frustrating in many ways).

• Specify AssetName (the name of the prep) in an attribute of the class.

Example code

[AssetName("TestPage")]
public class TestPageLifecycle : LifecyclePageBase
{
    // 생성자에서 받는 것을 선언합니다.
    private readonly TestPageView _view;
    private readonly PageEventPublisher _publisher;
    private readonly ModalManager _modalManager;

    // 생성자 인젝션
    [Inject]
    public TestPageLifecycle(TestPageView view, PageEventPublisher publisher, ModalManager modalManager) : base(view)
    {
        _view = view;
        _publisher = publisher;
        _modalManager = modalManager;
    }

    // 화면 전환 전 타이밍에 View 초기화하기
    protected override UniTask WillPushEnterAsync(CancellationToken cancellationToken)
    {
        var testModel = new TestPageModel();
        _view.SetView(testModel);
        return UniTask.CompletedTask;
    }

    // 화면 전환 후 버튼 이벤트 등록하기
    public override void DidPushEnter()
    {
        base.DidPushEnter();
        // 페이지 표시
        _view.OnClickPage.Subscribe(_ => {
          _publisher.SendPushEvent(new NextPageBuilder());
        });
        // Modal 표시
        _view.OnClickModal.Subscribe(_ => {
          _modalManager.Push(new NextModalBuilder()).Forget();
        });
    }
}

PageEventPublisher and ModalManager are functions of the ScreenSystem that are responsible for switching between Page and Modal, respectively. Next, we build the screen that will open with Builder.