設定搖桿的背景圖片的錨點如下：

設定搖桿的錨點為背景圖片的中心點。
並給搖桿繫結指令碼如下：

using UnityEngine;
using UnityEngine.EventSystems;
using System.Collections;
using System;

public class JoyStickController : MonoBehaviour,IDragHandler,IEndDragHandler {
    //最大的拖動距離
    public float maxDragDistance = 50f;
    //虛擬搖桿的方向
    public Vector3 direction;
    //玩家
 

    public GameObject player;
    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        //螢幕上的y軸分量 當作遊戲世界裡的z分量
        //設定玩家的朝向
        player.transform.forward = new Vector3(direction.x,0,direction.y);
        int flag = Vector3.Distance(Vector3.zero, this
 
.transform.localPosition) <1f ? 0 : 1;
        player.transform.Translate(Vector3.forward * flag * Time.deltaTime,Space.Self);

    }
    //拖拽中的時候
    public void OnDrag(PointerEventData eventData)
    {
        this.transform.position = Input.mousePosition;
        if (Vector3.Distance(Vector3.zero,this
 
.transform.localPosition) > maxDragDistance)
        {
            direction = this.transform.position - Vector3.zero;
            this.transform.localPosition = direction.normalized * maxDragDistance;
        }
    }
    //拖拽結束的時候
    public void OnEndDrag(PointerEventData eventData)
    {
        this.transform.localPosition = Vector3.zero;
    }
}