EventTriggerDrag

//Canvas内の動かしたいobjectにattach
//EventTriggerの設定
//OnBeginDrag
//OnDrag
//OnEndDrag
//JumpPos

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

[RequireComponent(typeof(CanvasGroup))]
public class DragObj : MonoBehaviour
{
    private Transform root;
    private Transform self;
    private CanvasGroup canvasGroup = null;
    public Rigidbody2D rb;
    //  public Transform firePoint;
    public GameObject bulletPrefab;
    public void Awake()
    {
        this.self = this.transform;
        this.root = this.self.parent;
        this.canvasGroup = this.GetComponent();
    }
    public void OnBeginDrag(BaseEventData eventData)
    {
      // UI 機能を一時的無効化
      this.canvasGroup.blocksRaycasts = false;
    }
    public void OnDrag(BaseEventData eventData)
    {
      this.self.localPosition = GetLocalPosition(((PointerEventData)eventData).position, this.transform);
    }
    private static Vector3 GetLocalPosition(Vector3 position, Transform transform)
    {
        // 画面上の座標 (Screen Point) を RectTransform 上のローカル座標に変換
        RectTransformUtility.ScreenPointToLocalPointInRectangle(
       transform.parent.GetComponent(),
        position,
        Camera.main,
        out var result);
        return new Vector3(result.x, -480f, 0);
      //  return new Vector3(result.x, result.y, 0);
    }
    public void OnEndDrag(BaseEventData eventData)
    {
        // UI 機能を復元
        this.canvasGroup.blocksRaycasts = true;
    }
    public void JumpPos()
    {
        if (rb.velocity.y == 0)
        {
        //  rb.AddForce(new Vector2(0, 8), ForceMode2D.Impulse);
        Instantiate(bulletPrefab, transform.position, Quaternion.identity);
        }
    }
}