csharp/Assets/Scripts/CardCounter.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class CardCounter : MonoBehaviour
{
    public Text counterText;
    private int counter = 0;

    public bool SetCounter(int _value)
    {
        counter += _value;
        OnCounterChange();
        if (counter == 0) 
        {
            Destroy(gameObject);
            return false;
        }
        return true;
    }

    private void OnCounterChange()//给卡牌数量文本字段赋值
    {
        //测试是否拿到counter数据，这里成功
        //Debug.Log("counter:"+counter.ToString());
        if (counterText != null) // 添加空值检查
        {
            counterText.text = counter.ToString();
        }
        else
        {
            Debug.LogError("counterText is null, please assign a Text component in the inspector.");
        }
    }
}