using UnityEngine using System Collections public class DragByTouch Mo

using UnityEngine;
using System.Collections;

public class DragByTouch : MonoBehaviour 
{
	void Update()
	{
		foreach (Touch touch in Input.touches)
		{
			Collider2D collider = Physics2D.OverlapPoint(Camera.main.ScreenToWorldPoint(touch.position));
			if (collider == null) return;

			switch (touch.phase)
			{
				case TouchPhase.Began:
					collider.gameObject.SendMessage("TouchBegan");
					break;

				case TouchPhase.Canceled:
					collider.gameObject.SendMessage("TouchEnded");
					break;

				case TouchPhase.Ended:
					collider.gameObject.SendMessage("TouchEnded");
					break;

				case TouchPhase.Moved:
					collider.gameObject.SendMessage("TouchMoved", touch);
					break;
			}
		}
	}
}