C# error CS1624: The body of `Obstaclecollision.OnTriggerEnter(UnityEngine.Collider)' cannot be an iterator block because `void' is not an iterator interface type

Questions & Answers
1

I’m trying to slow down the player and then return him to normal speed after 1 second.
I tried adding a delay but it then gives this error.

error CS1624: The body of Obstaclecollision.OnTriggerEnter(UnityEngine.Collider)' cannot be an iterator block because void’ is not an iterator interface type

here’s my code

void OnTriggerEnter(Collider other)
{

	print("Collision detected with trigger object " + other.name);
	PlayerComponent playerComponent = other.gameObject.GetComponent<PlayerComponent> ();
	//checking if collided with player
	if (playerComponent) {
		playerComponent.Speed *= SlowDownPercentage;
		Destroy (gameObject);
		yield return new WaitForSeconds(1);
		playerComponent.Speed *= ReturnToNormalSpeed;
	}
}

I’m very new to scripting and programming so bare with me please.

2

You can fix the problem by changing the ‘void’ to IEnumerator. This does not work for all callbacks, but it does for OnTriggerEnter().