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View Factories

Factories that create and destroy Views from prefabs. Used by the collection binders.

IViewFactory<T>​

The factory interface:

public interface IViewFactory<T> where T : IView
{
    T Create(IViewModel viewModel);
    void Release(T view);
}

PrefabViewFactory​

Creates a View from a prefab through Object.Instantiate. Release destroys the object.

Inspector properties​

PropertyDescription
_prefabThe MonoView prefab
_containerParent Transform for instantiated objects
_overrideSiblingOverride the order in the hierarchy
_siblingIndexIndex used when _overrideSibling = true

How it works​

  1. Create(viewModel): Instantiate(prefab, container) → view.Initialize(viewModel)
  2. Release(view): view.DestroyViewAndGameObject()
// From code:
var factory = new PrefabViewFactory(itemPrefab, container);

// Or typed:
var factory = new PrefabViewFactory<ItemView>(itemPrefab, container);

PrefabViewPool​

Inherits PrefabViewFactory but uses an ObjectPool<T> instead of create/destroy.

Inspector properties​

PropertyDescription
_initialCountInitial pool size (pre-warm)
_maxCountMaximum pool size

How it works​

  1. Create(viewModel): takes a View from the pool (or creates one) → SetActive(true) → Initialize(viewModel)
  2. Release(view): Deinitialize() → SetActive(false) → returns it to the pool
// From code:
var pool = new PrefabViewPool(itemPrefab, container, new PoolSettings(initialCount: 10, maxCount: 100));

Advantages over PrefabViewFactory​

  • No allocations on reuse
  • No Instantiate/Destroy calls
  • Fits lists with frequent add/remove

With collection binders​

View factories are used by ViewModelObservableListBinder and VirtualizedListItemSourceBinder:

// Inspector:
// ViewModelObservableListBinder → ViewFactory → PrefabViewPool
//                               → Prefab: ItemView
//                               → Container: ScrollContent
//                               → Initial Count: 20

See also​