DI Integration

The container owns the model and the ViewModel; ViewInitializer pulls the ViewModel out of it.

You learn: constructor injection into a ViewModel, ViewInitializer with Resolve Type = Di, Initialize Stage = DiConstructor, integration define symbols.

Assumes: Counter, scene Counter (ViewInitializer).

A wallet: a coin count and an "Earn" button. Two identical scenes, one per container.

Scene	Container	Registration
Wallet (Zenject)	Zenject SceneContext	Scripts/Zenject/WalletInstaller.cs
Wallet (VContainer)	VContainer LifetimeScope	Scripts/VContainer/WalletLifetimeScope.cs

ViewModel with a constructor dependency

[ViewModel]
public sealed partial class WalletViewModel : IDisposable
{
    [OneWayBind] private int _coins;

    private readonly Wallet _wallet;

    public WalletViewModel(Wallet wallet)
    {
        _wallet = wallet;
        _coins = wallet.Coins;
        _wallet.CoinsChanged += SetCoins;
    }

    [RelayCommand]
    private void Earn() => _wallet.Add(10);

    public void Dispose() => _wallet.CoinsChanged -= SetCoins;
}

No [Inject]. The ViewModel is an ordinary class with a constructor, and the container builds it like any other service.

Registration

Zenject, a MonoInstaller on SceneContext:

public override void InstallBindings()
{
    Container.Bind<Wallet>().AsSingle();
    Container.Bind<WalletViewModel>().AsSingle();
}

VContainer, a LifetimeScope in the scene:

protected override void Configure(IContainerBuilder builder)
{
    builder.Register<Wallet>(Lifetime.Singleton);
    builder.Register<WalletViewModel>(Lifetime.Singleton);
}

Both files are wrapped in #if ASPID_MVVM_ZENJECT_INTEGRATION / #if ASPID_MVVM_VCONTAINER_INTEGRATION, so the sample compiles with either container alone.

ViewInitializer

On the View object:

Field	Value
Views → Resolve Type	Component, reference to WalletView
ViewModel → Resolve Type	Di, type WalletViewModel
Initialize Stage	DiConstructor

DiConstructor initializes at the moment the container injects ViewInitializer: before Awake, with the container already built. Zenject needs only a SceneContext. For VContainer the View object must be in Auto Inject Game Objects on the LifetimeScope, otherwise injection never happens.

Define symbols

• VContainer is the UPM package jp.hadashikick.vcontainer; versionDefines in the .asmdef turns on ASPID_MVVM_VCONTAINER_INTEGRATION automatically.
• Zenject is not a package, so add ASPID_MVVM_ZENJECT_INTEGRATION to Scripting Define Symbols yourself.

note

A scene for a container you have not installed opens with missing scripts. That is expected.

More in DI Integration and View Initializers.

Text uses TextMeshPro (part of com.unity.ugui). The sample ships its own font asset in Fonts/ (Liberation Sans, OFL), so it does not depend on the fonts from TMP Essentials.