uGUIで描画を行わない、入力をとるだけの専用コンポーネント

HideImage.cs

using UnityEngine;
using UnityEngine.UI;

#if UNITY_EDITOR
using UnityEditor;
#endif

public class HideImage : Graphic
{
	public override Material material
	{
		get => null;
		set {}
	}

	public override Material materialForRendering => null;

	public override void SetAllDirty()
	{
		SetLayoutDirty();
	}

	public override void SetVerticesDirty() { }

	public override void SetMaterialDirty() { }

	protected override void UpdateGeometry() { }

	protected override void OnPopulateMesh(VertexHelper vh) { }
}

#if UNITY_EDITOR
[CustomEditor(typeof(HideImage))]
public class HideImageEditor : Editor
{
	public override void OnInspectorGUI()
	{
	}
}
#endif