UnityEditor.CustomEditor使用時のプリミティブ配列地獄からの脱却

Hoge.cs

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;

public class HogeComponent : MonoBehaviour
{
	public enum Fuga
	{
		Foo,
		Bar,
		Baz
	}
	
	public int SelectedIndex;
	public List<string> Selections = new List<string>(Enum.GetNames(typeof(HogeComponent.Fuga)));
	
	void Start()
	{
	}
	
	void Update()
	{
	}
}

HogeInspector.cs

using UnityEngine;
using UnityEditor;
using System.Collections;

[CustomEditor(typeof(HogeComponent))]
public class HogeComponentInspector : Editor
{
	public override void OnInspectorGUI()
	{
		HogeComponent hoge = target as HogeComponent;
		GUILayout.Label("Hoge selections");
		hoge.SelectedIndex = GUILayout.SelectionGrid(controller.SelectedIndex, hoge.Selections.ToArray(), 1, "toggle");
	}
}