連結：https://pan.baidu.com/s/1KjAuOZsKTP-v73-bM4AFeg 
提取碼：odiw 

 這是我寫的一個外掛，

效果如下：

 原始碼：

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

public class TouchManager : MonoBehaviour {

    public GameObject TouchItem;
    public Vector3 dir;
    public bool touchMove;

    public static TouchManager Instance;

    void Awake()
    {
        Instance = this;
    
    }

    
	void Update () {


        if (Input.GetMouseButtonDown(0))
        {

            if (Input.mousePosition.x < 200 && Input.mousePosition.y<200)
            touchMove = true;
            Debug.Log(Input.mousePosition);
            
            
        }


        if (Input.GetMouseButtonUp(0))
        {
            touchMove = false;
            dir = new Vector3();
            TouchItem.transform.localPosition = new Vector3();
        }

        if (touchMove == true)
        {
            

            TouchItem.GetComponent<RectTransform>().position = Input.mousePosition;
            dir = Vector3.Normalize(new Vector3(TouchItem.transform.localPosition.x, 0, TouchItem.transform.localPosition.y));
        
        }


       
	}

}
 

測試：