Instantiate object after delay

Questions & Answers
1

Here is my code but after 2 seconds it only spawns 1 object and stops.

public class SpawnManager : MonoBehaviour
{
    
    public GameObject prefab;
    
    void Start()
    {
         
    }

    
    void Update()
    {
      StartCoroutine(InstantiateObjects(2f));
    }

    IEnumerator InstantiateObjects(float ct)
    {
       yield return new WaitForSeconds(ct);
        {
          Instantiate(prefab, new Vector3(2.0f, 0, 4), Quaternion.identity);
        }
    }
    
}
2

You should not use a coroutine like that. Instead of update, place it in start, and put contents of the coroutine (waitforseconds and instantiate) in while(true). Also you dont need those brackets under waitforseconds.

3

void Start ()
{
float inTime = 2f;
InvokeRepeating (nameof(Spawn), inTime);
}

void Spawn ()
{
    Instantiate(prefab, position, Quaternion.identity);
}

If you put a coroutine in the Update loop then it’s going to be called at each frame. And don’t use brackets after WaitForSeconds.

4

The way I would do it is this:

    float timer = 0;
    bool hasSpawned = false;
    
    void Update()
    {
         if (!hasSpawned)
         {
              timer++;
         }
         if (timer >= 100 && !hasSpawned)
         {
              //Instantiate the object
              hasSpawned = true;
         }
    }

I haven’t tested this yet, but I hope it helps!
(one more thing, ask chatGPT whatever you want to know like “How would I Instantiate object after delay in unity” and then once it has responded, if it hasn’t yet written some code, ask it “write some code” here’s a link: https://chat.openai.com/chat it’s quite cool!)