How to start coroutine from another script?

Question

Did my search and didn't quite find an answer. I'm making a countdown timer. Now - it works very neatly if I use start, update and IEnumerator and attach the entire script to the main camera. But I'd like to be able to have the ability to just have a simple call of the timer in another script. Something like Timer.Start_CountDown();

 public static IEnumerator Counter(){
     
     for(int a = 9; a >= 0; a--){
         if(a == 9){
             for(int x = 0; x <= 9; x++){
                     Ones_Number[x].GetComponent<SpriteRenderer>().enabled = false;
                     Tens_Number[x].GetComponent<SpriteRenderer>().enabled = false;
                 }
             Ones_Number[0].GetComponent<SpriteRenderer>().enabled = true;
             Tens_Number[9].GetComponent<SpriteRenderer>().enabled = true;
             yield return new WaitForSeconds (1f);
         }
         else
         {for(int i = 9; i >= 0; i--){
             for(int x = 0; x <= 9; x++){
                     Ones_Number[x].GetComponent<SpriteRenderer>().enabled = false;
                     Tens_Number[x].GetComponent<SpriteRenderer>().enabled = false;
                 }
                 Ones_Number[i].GetComponent<SpriteRenderer>().enabled = true;
                 Tens_Number[a].GetComponent<SpriteRenderer>().enabled = true;
                 yield return new WaitForSeconds (1f);
             }
             }
             
         }
     }

This is the timer base. I tried making a static void which would start the coroutine and that void would be called from another scrip, but it doesn't work.

I'm using c#.

Answer 1

Best Answer

Answer by zharik86 · Sep 01, 2014 at 06:58 PM

Create two scripts and attach them, for example, at Main Camera. The first script contains your timer with all variables:

  using UnityEngine;
  using System.Collections;
 
  public class myTimer : MonoBehaviour {
   //Create your variable
   ...
   //Your function timer
   public IEnumerator Counter() {
    ...
   }
  }

In the second script, for example, as Start () we will call the timer:

  using UnityEngine;
  using System.Collections;
 
  public class myCallTimer : MonoBehaviour {

   void Start() {
    //myTimer script attach at Main Camera, than
    StartCoroutine(Camera.main.GetComponent<myTimer>().Counter());
   }
  }

I hope that it will help you.

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$$anonymous$$ · May 31, 2016 at 01:55 PM 0

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Thank you!!

Bunny83 · May 31, 2016 at 08:22 PM 11

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$$anonymous$$eep in $$anonymous$$d that this will run the coroutine on the gameobject where the "myCallTimer" script is attached to, not on the main camera. As long as the gameobject and the script aren't destroyed there's no problem, it just can lead to problems in cases where the calling script / object is destroyed.

If you want to run the coroutine on the "myTimer" script you should do:

 void Start() {
     myTimer obj = Camera.main.GetComponent<myTimer>();
     obj.StartCoroutine(obj.Counter());
 }

ps: Classnames (in almost any program$$anonymous$$g languages) should start with an upper case letter.

micheal_s Bunny83 · Mar 11, 2019 at 08:35 PM 0

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You helped me so much thank you god bless <3

Saki_col Bunny83 · Aug 08, 2019 at 07:07 PM 0

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good to know it thanks!

gitlinjoss Bunny83 · Apr 21, 2020 at 08:22 PM 0

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exactly what I needed chief!

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KarlKarl2000 · Jul 30, 2016 at 04:42 PM 2

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 StartCoroutine(Camera.main.GetComponent<myTimer>().Counter());

That was it! Thank YOU :)

How to start coroutine from another script?

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