StartCoroutine inside TriggerOnEnter2D isn't working

Question

I am new to this, but I need help with a CSharp script. I need to collide with the desired object, pass the game to be 1.6 in TimeScale. After passing 8 seconds in the game, change back to 1 TimeScale, and try to call a Coroutine does not work. I really appreciate your help!

The code:

void TimeSet(){
    Time.timeScale = 1.6f;
}

IEnumerator Normal (){
    yield return new WaitForSeconds(8f);
    Time.timeScale = 1f;
    Debug.Log ("Ready");
}

void OnTriggerEnter2D(){
    TimeSet ();
    StartCoroutine ("Normal");
}

Answer 1

OnTriggerEnter2D is supposed to have a Collider2D parameter. As yours have none the method signature is different and that's probably why it's never called when a collision occurs.

Also as explained in the documentation I would strongly suggest to use StartCoroutine in it's method parameter form instead of using it with a string parameter.

I hope it helps.

EDIT

You should try by changing your OnTriggerEnter2D by:

void OnTriggerEnter2D(Collider2D othercollider)
{
    TimeSet ();
    StartCoroutine (Normal());
}

Also be sure that one of your game objects has a RigidBody2D