battlearray_client/Assets/Editor/Inspector/MapItemPosInspector.cs

using UnityEditor;
using UnityEngine;
using System.Collections;

[CustomEditor(typeof(MapItemPos))]
public class MapItemPosInspector : Editor {

	public override void OnInspectorGUI () {  

		DrawDefaultInspector();

		MapItemPos mapItemPos = target as MapItemPos;
		mapItemPos.id = EditorGUILayout.IntField("Id", mapItemPos.id);

	}
}