problems with yield in unity

Question

I have a function to make a simple menu animation in NGUI. It seems to work great, but when I go ingame and then return to menu, the function is not working properly.

IEnumerator MenuTransition (GameObject panelOut, GameObject panelIn) {
    foreach (Transform child in panelOut.transform)
    {
        if(child.gameObject.collider != null)
        {
            child.gameObject.collider.enabled = false;
            UIButton [] buttons = child.GetComponents<UIButton>();
            foreach(UIButton b in buttons) b.UpdateColor(true, true);
        }
        child.gameObject.animation.Play("MenuTransitionOff");
    }
    Debug.Log("time: "+animTime);
    //yield return new WaitForSeconds(animTime);
    Debug.Log("ini");
    foreach (Transform child in panelIn.transform)
    {       
        UIButton [] buttons = child.GetComponents<UIButton>();
        foreach(UIButton b in buttons) b.UpdateColor(true, true);
        child.gameObject.animation.Play("MenuTransitionOn");
    }
    //yield return new WaitForSeconds(animTime);
    foreach (Transform child in panelIn.transform)
    {           
        if(child.gameObject.collider != null)
        {
            child.gameObject.collider.enabled = true;
        }
    }
    Debug.Log("3");
    yield return null;
    Debug.Log("4");
}

And this function quets clled from another one that's assigned to a button onclick event (using NGUI).

void OnMainMatch () {
    StartCoroutine(MenuTransition(mainPanel, matchPanel));
}

With the yields uncommented, the app seem to crash at the first one and no more logs appear after, but even if I comment the two yields and add one at the end, I get no animation and the buttons become irresponsive. In that last case, 4 gets printed. This occurs only after getting ingame and returning to menu, not the first time the menu is executed. I have also debugged the animation time and it's less than a second, so it's correct. I really have no clue on where to look for the error. Any idea on where to look for?

When it crashes, how exactly does it do that? Are you getting any exception? — svick, Feb 07 '13 at 15:01

score 0 · Answer 1 · answered Jul 23 '13 at 06:13

I had the same kind of problem with NGUI's OnClick and coroutines, and it appeared because the OnClick-button was set inactive after calling the StartCoroutine. This causes that the iteration of the coroutine is exterminated, because it is the OnClick-object that manages the coroutine. Not sure if this is the same problem though.

problems with yield in unity

1 Answers1