财产没有价值

Question

我不明白为什么TimeBetweenSpawns属性没有价值。

也请让我知道，是否有更好的方法可以在按下后一段时间禁用按钮，然后再次启用它。

UnitSpawn.cs

public class UnitSpawn : MonoBehaviour
{
    private GameObject position;
    private Button button;

    public void Awake()
    {
        button = GameObject.Find("Canvas/Button").GetComponent<Button>();
    }

    public void SpawnUnit(Unit unit)
    {
        position = GameObject.Find(unit.SpawnPosition);

        Instantiate(unit.gameObject, position.transform.position, 
            position.transform.rotation);

        button.enabled = false;

        StartCoroutine(WaitTime(unit.TimeBetweenSpawns));
    }

    IEnumerator WaitTime(int timeBetweenSpawns)
    {
        yield return new WaitForSeconds(timeBetweenSpawns);
        button.enabled = true;
    }
}

Unit.cs

public abstract class Unit : MonoBehaviour
{
    public abstract string SpawnPosition  { get; set; }
    public abstract int MovementSpeed     { get; set; }
    public abstract int TimeBetweenSpawns { get; set; }
    public abstract int Health            { get; set; }
    public abstract int AttackSpeed       { get; set; }
    public abstract int Damage            { get; set; }

    public void Move()
    {
        var rb = GetComponent<Rigidbody2D>();
        rb.velocity = new Vector2(-MovementSpeed, rb.velocity.y);
    }
}

Unit1.cs

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

public class Unit1 : Unit
{
    public override string SpawnPosition  { get; set; } = 
        "SpawnManager/SpawnPositionForUnit1";
    public override int MovementSpeed     { get; set; } = 3 ;
    public override int TimeBetweenSpawns { get; set; } = 3;
    public override int Health            { get; set; }
    public override int AttackSpeed       { get; set; }
    public override int Damage            { get; set; }

    public void Update()
    {
        Move();
    }
}

和调试器的屏幕截图：