How to stop spawning enemies after countdown timer reaches zero?

Questions & Answers
1

I’m trying to stop the enemy spawn when my countdown timer reaches zero so that the boss shows up but I don’t know how to do it.

Here’s my countdown timer code

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

public class Countdown_Timer : MonoBehaviour
{
    float currentTime = 0f;
    float startingTime = 10f;
    [SerializeField] Text countdownText;
    


    // Start is called before the first frame update
    void Start()
    {
        currentTime = startingTime;
    }

    // Update is called once per frame
    void Update()
    {
        currentTime -= 1 * Time.deltaTime; //timer decreases by one each second
        countdownText.text = currentTime.ToString("0"); //conver float to string

        //stop the timer to zero
        
            
            if (currentTime <= 0) 
            {
                currentTime = 0;
                
            }
            
        
    }
}

And here’s my enemy spawner code

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

public class EnemySpawner : MonoBehaviour
{
    public GameObject enemy;
    float randX;
    Vector2 whereToSpawn;
    public float spawnRate = 5f;
    float nextSpawn = 0.0f;
    bool spawn = true;
    public float timer;


    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (Time.time > nextSpawn)
        {
            nextSpawn = Time.time + spawnRate;
            randX = Random.Range(-18f, 18f);
            whereToSpawn = new Vector2(randX, transform.position.y);
            Instantiate(enemy, whereToSpawn, Quaternion.identity);
        }

        if (Time.time > timer)
        {
            StopSpawning();
        }
    }
    public void StopSpawning()
    {
        spawn = false;
    }

}
2

I think you just have to call public void StopSpawning() then stop the timer… Try this :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class Countdown_Timer : MonoBehaviour
 {
     float currentTime = 0f;
     float startingTime = 10f;
     [SerializeField] Text countdownText;
     private bool HasReached;
     public EnemySpawner Spawner; //Assign this in the inspector
     
     void Start()
     {
         HasReached = false;
         currentTime = startingTime;
     }
 
     void Update()
     {
         if (HasReached == false)
         {
             currentTime -= 1 * Time.deltaTime; //timer decreases by one each second
             countdownText.text = currentTime.ToString("0"); //conver float to string
 
             //stop the timer to zero                     
             if (currentTime <= 0) 
             {
                 HasReached = true;
                 Spawner.StopSpawning();                 
             }
         }         
     }
 }

Then for the EnemySpawer script :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class EnemySpawner : MonoBehaviour
 {
     public GameObject enemy;
     float randX;
     Vector2 whereToSpawn;
     public float spawnRate = 5f;
     float nextSpawn = 0.0f;
     bool spawn = true;
     bool HasSpawnedBoss;
 
     void Start()
     {
         HasSpawnedBoss = false;
     }
 
     void Update()
     {
         if (Time.time > nextSpawn && spawn == true)
         {
             nextSpawn = Time.time + spawnRate;
             randX = Random.Range(-18f, 18f);
             whereToSpawn = new Vector2(randX, transform.position.y);
             Instantiate(enemy, whereToSpawn, Quaternion.identity);
         }
         else if (spawn == false && HasSpawnedBoss == false)
         {
             HasSpawnedBoss = true;
             //Add your boss spawning script here
         }
     }

     public void StopSpawning()
     {
         spawn = false;
     }
 }