1.确认再canvas组件下方
2.要再canvas的组件范围内，按照相对距离去摆放button的位置
3.绑定脚本

image.png

4.通过GameObject的GetComponent函数去调用人物组件脚本的移动函数

            [SerializeField] private GameObject player_object;
            PlayerMovement player = player_object.GetComponent<PlayerMovement>();
            player.LeftMove();

5.通过代码实现button点击和弹起响应时间

using UnityEngine.EventSystems;

public class MoveButtons : MonoBehaviour, IPointerDownHandler, IPointerUpHandler

    public void OnPointerDown(PointerEventData eventData)
    {
        Debug.Log("Button Pressed");
        is_left_press = true;
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        Debug.Log("Button Released");
        is_left_press = false;
    }

6.注意rb.velocity = new Vector2(dirX * moveSpeed, rb.velocity.y);要放在update中