Reset WaitForSeconds Coroutine

Question

Hi everyone,
I am making a game where the player can pick up PowerUp's. These PowerUP's last for 30 seconds. I do do that by simply setting a bool to false in a coroutine. The problem is that if the player already picked the PowerUp up and picks it up agian within the 30 seconds the coroutine from the first PowerUP still runs. But I need to reset the coroutine to 30 seconds.
I tried to stop the coroutine with:

    if(collisiongameObject.CompareTag("Shield")
      {
          StopCoroutine("DeactivateShield");
          StartCoroutine(DeactivateShield(30));
      }

and the coroutine:

 IEnumerator DeactivateShield(float time)
     {
         yield return new WaitForSeconds(time);
 
         shieldActive = false;
        
     }

but this seems to just pause the Coroutine.
Is there a possibility to reset the coroutine or restart it?

Answer 1

Best Answer

Answer by TreyH · May 11, 2018 at 12:40 PM

From the docs: Note: Do not mix the three arguments. If a string is used as the argument in StartCoroutine, use the string in StopCoroutine. Similarly, use the IEnumerator in both StartCoroutine and StopCoroutine. Finally, use StopCoroutine with the Coroutine used for creation.

You can read more on StartCoroutine and StopCoroutine.

I tend to avoid WaitForSeconds, but it's just a preference thing:

 // Class-level reference to the shield routine if you have one
 private Coroutine shieldRoutine;
 
 if(collisiongameObject.CompareTag("Shield")
 {
     if (this.shieldRoutine != null)
         StopCoroutine(this.shieldRoutine);
     
     this.shieldRoutine = StartCoroutine(DeactivateShield(30));
 } 
 
 IEnumerator DeactivateShield(float time)
 {
     // GC purposes
     var instruction = new WaitForEndOfFrame();
 
     // Assume we're active by default
     this.shieldActive = true;
 
     // If you enter a non-positive time, this will be ignored
     while (time > 0) 
     {
         time -= Time.deltaTime;
         yield return instruction;
     }
 
     // Kill shield at the end
     this.shieldActive = false;
 }

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LAZYGAMES_ · May 11, 2018 at 12:54 PM 1

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Works perfect. Thank you for your awnser!

Reset WaitForSeconds Coroutine

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