UGUI实现虚拟摇杆

给摇杆挂载的脚本：
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class mover : MonoBehaviour,IBeginDragHandler,IDragHandler,IEndDragHandler
{
    public RectTransform backrect;//需要在unity中将背景UI拖到里面
    public RectTransform selfrect;//需要在unity中将摇杆UI拖到里面
    public float radis;//摇杆半径
    public Vector2 direction;//摇杆方向
    public bool ismoving = false;
    public Action<Vector2> MoveEvent;//作为人物移动事件的调用

    public void Awake()
    {
        radis = backrect.sizeDelta.x / 2;
    }
    public   void Update()
    {
        if (ismoving)
            if (MoveEvent != null)
                MoveEvent.Invoke(direction);
    }
    public void OnBeginDrag(PointerEventData eventData)
    {
        selfrect.anchoredPosition = eventData.position - backrect.anchoredPosition;
        ismoving = true;
    }

    public void OnDrag(PointerEventData eventData)
    {
        selfrect.anchoredPosition = eventData.position - backrect.anchoredPosition;//计算摇杆正确位置
        if ((backrect.position - selfrect.position).magnitude > radis)
            selfrect.anchoredPosition = Vector2.ClampMagnitude(selfrect.anchoredPosition, radis);//限制摇杆范围
        direction = selfrect.anchoredPosition.normalized;
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        selfrect.anchoredPosition = Vector2.zero;
        ismoving = false;
    }
}

给unity中挂载的脚本：

给游戏对象挂载的脚本：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class player : MonoBehaviour
{
   public CharacterController controller ;
   public mover VJ;
   public float speed = 5;
    private Vector3 Direction = Vector3.zero;

    private void Awake()
    {

        VJ.MoveEvent = Move;//注册游戏对象的移动
    }

    private void Move(Vector2 direction)
    {
        Direction.x = direction.x;
        Direction.z = direction.y;
        transform.rotation = Quaternion.LookRotation(Direction);
        controller.Move(transform.forward * speed * Time.deltaTime);
    }


}
//需要在玩家对象上添加组件：charactre collkklion     然后拖给脚本中的charactercontroller

用法：

1.将第一个脚本挂载到UI摇杆image上

2.将第二个脚本挂载到unity任意模型上

3.将相应物体拖入到两个脚本中即可