Unity Draggable

Draggable.cs

using UnityEngine;

namespace Game.Model
{
    /// <summary>
    /// 有可拖拽的
    /// </summary>
    public class Draggable : MonoBehaviour
    {
        private float startPosX;
        private float startPosY;
        private bool isBeingHeld = false;

        private void Update()
        {
            if (isBeingHeld)
            {
                Vector3 mousePos;
                mousePos = Input.mousePosition;
                mousePos = Camera.main.ScreenToWorldPoint(mousePos);

                gameObject.transform.localPosition = new Vector3(mousePos.x - startPosX, mousePos.y - startPosY, 0);
            }
        }

        private void OnMouseDown()
        {
            if (Input.GetMouseButtonDown(0))
            {
                Vector3 mousePos;
                mousePos = Input.mousePosition;
                mousePos = Camera.main.ScreenToWorldPoint(mousePos);

                startPosX = mousePos.x - gameObject.transform.localPosition.x;
                startPosY = mousePos.y - gameObject.transform.localPosition.y;

                isBeingHeld = true;
            }
        }

        private void OnMouseUp()
        {
            isBeingHeld = false;
        }
    }
}