Waiting for coroutine to finish before moving forward

Question

So I have this coroutine that moves an object to a place, and I do it for a list of objects, but I want it to move them one by one (aka wait until previous coroutine is done before starting a new one) but adding any yields just stops the whole thing... im a bit lost to why.

Ive tried adding "yield return new WaitUnitl()" or "WaitForSeconds" but wherever i try to place it it either makes it wait before moving everything at once or they just stop moving all at once

Moving code:

public IEnumerator MoveObject(Vector3 source, Vector3 target, float overTime)
    {
        float startTime = Time.time;
        while (Time.time < startTime + overTime)
        {
           transform.position = Vector3.Lerp(source, target, (Time.time -     startTime) / overTime);

            yield return null;

        }


        transform.position = target;


    }

called in this for loop:

for (int i = 0; i < CardsInHand.Count; i++)
        {
            Card c = CardsInHand[i];
            Vector3 target = new Vector3(startt + (1.5f * i), transform.position.y);
            StartCoroutine(c.MoveObject(c.transform.position, target, 1));
            c.GetComponent<SpriteRenderer>().sortingOrder = i;

        }

Expect them to move one at a time, not all at once

Edit: well I had the biggest fart ever.... i forgot to use StartCoroutine() after making the method a coroutine... and i kept wondering why it wont move

Fredrik Schön Fredrik Schön · Accepted Answer · 2019-06-18T17:22:31

To await a Coroutine you want to change the method you're currently in to be in a Coroutine, and then yield the new coroutine like this:

IEnumerator MyMethod() 
{
    for (int i = 0; i < CardsInHand.Count; i++)
    {
        Card c = CardsInHand[i];
        Vector3 target = new Vector3(startt + (1.5f * i), transform.position.y);
        yield return StartCoroutine(c.MoveObject(c.transform.position, target, 1)); 
        c.GetComponent<SpriteRenderer>().sortingOrder = i;
    }
}

From this answer by @Everts:

When creating a coroutine, Unity attaches it to a MonoBehaviour object. It will run first on call fo the StartCoroutine until a yield is hit. Then it will return from the coroutine and place it onto a stack based on the yield.

Waiting for coroutine to finish before moving forward

1 Answers