c# - 在场景中注入游戏对象

Question

所以我有带有GameState组件的游戏对象，并且我有带有SceneContext和GameInstaller组件的游戏对象。GameInstaller有GameState的字段，我也将 GameInstaller 引用到monoinstallers。当我从 prefab 实例化玩家游戏对象时 - 在GameState字段上具有 [Inject] 属性，并尝试使用GameState组件访问场景中的那个非常游戏对象 - 我得到空引用。

这就是我绑定的方式，这就是我注入的方式（它是我的敌人/玩家的基类）

public class GroundEnemy : AbstractUnit

    public override void SetDefaultConfig(UnitData groundEnemyData, Camera camera, Player target)
{
    Debug.Log(gameState + " - gamestate ref in " + this.name);
    this.target = target;
    healthbarCanvas.worldCamera = camera;
    maxHealth = currentHealth = groundEnemyData.Health;
    speed = groundEnemyData.UnitSpeed;
    collisionDamage = groundEnemyData.UnitColisionDmg;
    gameState.OnGameLost.AddListener(this.LostGame);
}

符合 gameState.OnGameLost - 我有一个空参考。我在基类中注入GameState ，它源自 monobeh。

这就是我用播放器/敌人脚本实例化预制件的方式

public class Spawner : MonoBehaviour

{
[InjectOptional] private Player injectedPlayer;
[SerializeField] private LevelLoader levelLoader;
[SerializeField] private CameraTracker camTracker;    
[SerializeField] private Joystick joystick;
[Inject(Id = "Player")] private UnitData playerEntity;
[Inject(Id = "Fly Enemy")] private UnitData flyEntity;
[Inject(Id = "Ground Enemy")] private UnitData groundEntity;
[Inject(Id = "Boss Enemy")] private UnitData bossEntity;
[Inject] private ArenaData arenaData;
[Inject] private GameState gameState;
[Header("Prefabs")]
[SerializeField] private Player playerPrefab;
[SerializeField] private FlyEnemy flyEnemyPrefab;
[SerializeField] private GroundEnemy groundEnemyPrefab;
[SerializeField] private BossEnemy bossEnemyPrefab;
[HideInInspector] public List<AbstractUnit> AliveEnemies = new List<AbstractUnit>();
private Player cashedPlayer;

private void Start()
{
    InstantiateEntities();
}

private void InstantiateEntities()
{
    if (injectedPlayer != null)
    {
        var player = Instantiate(injectedPlayer, arenaData.PlayerSpawnPos, Quaternion.identity);
        player.HealthbarCanvas = camTracker.PriorCamera;
        ExtraSetup(player);
    }
    else
    {
        var player = Instantiate(playerPrefab, arenaData.PlayerSpawnPos, Quaternion.identity);
        player.SetDefaultConfig(playerEntity, camTracker.PriorCamera);
        ExtraSetup(player);
    }

    if (arenaData.FlySpawnPoints.Count != 0)
    {
        for (int i = 0; i < arenaData.FlySpawnPoints.Count; i++)
        {
            var entity = Instantiate(flyEnemyPrefab, arenaData.FlySpawnPoints[i], Quaternion.identity);
            AliveEnemies.Add(entity);
            entity.SetDefaultConfig(flyEntity, camTracker.PriorCamera, cashedPlayer);
        }
    }

    if (arenaData.GroundSpawnPoints.Count != 0)
    {
        for (int i = 0; i < arenaData.GroundSpawnPoints.Count; i++)
        {
            var entity = Instantiate(groundEnemyPrefab, arenaData.GroundSpawnPoints[i], Quaternion.identity);
            AliveEnemies.Add(entity);
            entity.SetDefaultConfig(groundEntity, camTracker.PriorCamera, cashedPlayer);
        }
    }

    if (arenaData.BossSpawnPos != Vector2.zero)
    {
        var entity = Instantiate(bossEnemyPrefab, arenaData.BossSpawnPos, Quaternion.identity);
        AliveEnemies.Add(entity);
        entity.SetDefaultConfig(bossEntity, camTracker.PriorCamera, cashedPlayer);
    }
}

private void ExtraSetup(Player player) 
{
    camTracker.SetTarget(player.transform);
    joystick.player = player;
    joystick.gameObject.SetActive(true);
    cashedPlayer = player;
}

public void RemoveEnemy(AbstractUnit abstractUnit)
{
    AliveEnemies.Remove(abstractUnit);
    if (AliveEnemies.IsEmpty())
    {
        gameState.OnPlayerWinLvl?.Invoke();
        if (SceneManager.GetActiveScene().buildIndex + 1 != SceneManager.sceneCount)
        {
            StartCoroutine(levelLoader.LoadScene(SceneManager.GetActiveScene().buildIndex + 1, cashedPlayer));
        }
    }
}

}

标签： c#unity3dzenject

Answer 1

您需要绑定 FromInstance，如下所示：

Container.BindInterfacesAndSelfTo<GameState>().FromInstance(_myGameStateReference).AsSingle();