How to get specific instance of component in SerializeField if there are several components of the same type on the same object?

Unity Engine
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1

I have this component that I use to control some kind of animation. I can have several components of this class on the same object - for example one component controls scale animation and other controls some kind of movement.

public abstract class Showable : MonoBehaviour
{
	[SerializeField] public float defaultDuration = 0.2f;

	public abstract void Show(float t, Action callback = null);
	public abstract void Hide(float t, Action callback = null);
	public abstract void HideImmediatly(Action callback = null);

	public virtual void Show(Action callback = null) => Show(defaultDuration, callback);
	public virtual void Hide(Action callback = null) => Hide(defaultDuration, callback);

	public void ShowFromHiddenState(float t, Action callback = null)
	{
		HideImmediatly(() => Show(t, callback));
	}

	public void ShowFromHiddenState(Action callback = null)
	{
		HideImmediatly(() => Show(defaultDuration, callback));
	}
}

I also created this MultipleAnimations component to combine several animations into one Showable.

public class MultipleAnimations : Showable
{
	[SerializeField] private List<Showable> animations;

	public override void Show(float t, Action callback = null)
	{
		animations.ForEach(x => x.Show(t));
		Scheduler.Delay(callback, t);
	}

	public override void Hide(float t, Action callback = null)
	{
		animations.ForEach(x => x.Hide(t));
		Scheduler.Delay(callback, t);
	}

	public override void HideImmediatly(Action callback = null)
	{
		animations.ForEach(x => x.HideImmediatly());
		callback?.Invoke();
	}
}

The problem is that I can’t drag and drop several animations into this list, because I will just add the same component (I assume it the top component in the hierarchy).

2

You would need to drag the specific components themselves into the collection, via dragging their component headers.

You might need to Right-Click → Properties on the game object to open up a mini-inspector to make it easier to drag the components.

Mind you, this would be an instance where serialising these as plain C# classes with polymorphism using SerializeReference would be more straight-forward, granted you have the inspector support. I have an example here: abstract SkillList that can be edited in Inspector - #15 by spiney199

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