【Unity】ドラッグでオブジェクトを動かす【EventSystem】

DragEventTest.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
//CameraのProjectionはOrthographicに。

public class DragEventTest : MonoBehaviour,IDragHandler {

	public void OnDrag(PointerEventData data){
		Vector3 TargetPos = Camera.main.ScreenToWorldPoint (data.position);
		TargetPos.z = 0;
		transform.position = TargetPos;
	}
}