【制作100个unity游戏之27】使用unity复刻经典游戏《植物大战僵尸》，制作属于自己的植物大战僵尸随机版和杂交版2（附带项目源码）

public class Card : MonoBehaviour
{
    private GameObject darkBg;//黑图
    private GameObject progressBar;//进度
    public float waitTime; //等待时间
    public int useSun;//需要阳光
    void Start()
    {
        darkBg = transform.Find("黑色底图").gameObject;
        progressBar = transform.Find("黑色进度").gameObject;
    }

    void Update()
    {
        UpdateProgress();
        UpdateDarkBg();
    }

    void UpdateProgress(){
        progressBar.GetComponent<Image>().fillAmount -= 1 / waitTime * Time.deltaTime;
    }

    void UpdateDarkBg(){
        if(progressBar.GetComponent<Image>().fillAmount == 0){
            darkBg.SetActive(false);
        }else{
            darkBg.SetActive(true);
        }
    }
}

public class Card : MonoBehaviour, IDragHandler, IBeginDragHandler, IEndDragHandler
{
    public GameObject prefab;//预制体
    public LayerMask layerMask;//检测图层
    private GameObject thisObject;
  
  //。。。

    //开始拖拽
    public void OnBeginDrag(PointerEventData eventData)
    {
        Debug.Log("开始拖拽");
        if (progressBar.GetComponent<Image>().fillAmount != 0) return;
        thisObject = Instantiate(prefab, transform.position, Quaternion.identity);
    }

    //拖拽中
    public void OnDrag(PointerEventData eventData)
    {
        Debug.Log("拖拽中");
        if (thisObject == null) return;
        //植物跟随鼠标
        Vector2 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        thisObject.transform.position = new Vector2(mousePosition.x, mousePosition.y); // 将物体位置设置为鼠标位置
    }

    //拖拽结束
    public void OnEndDrag(PointerEventData eventData)
    {
        Debug.Log("拖拽结束");
        if (thisObject == null) return;
        Vector3 mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        Vector2 mousePosition2D = new Vector2(mousePosition.x, mousePosition.y);
        RaycastHit2D hit = Physics2D.Raycast(mousePosition2D, Vector2.zero, Mathf.Infinity, layerMask);//鼠标“点检测”射线
        if (hit.collider != null && hit.collider.transform.childCount == 0)
        {
            thisObject.transform.parent = hit.transform;
            thisObject.transform.localPosition = Vector2.one;
      thisObject = null;
            //重置进度
            progressBar.GetComponent<Image>().fillAmount = 1;

            //TODO扣除阳光
        }
        else
        {
            Destroy(thisObject);
        }

    }
}