Problem while detecting touch inside a coroutine

Questions & Answers
1

Hello to everyone. With the following code I’m trying to disable a GUI, waiting for a touch to re-enable it inside a coroutine. It doesn’t work but i can’t figure out why.

    IEnumerator DisplayConversation(Conversation c)
    {
        inputManager.SendMessage("DisableInput");
        conversating = true;
        foreach (ConversationEntry line in c.conversationLines)
        {
            //doStuff
            yield return StartCoroutine(WaitForTouch());
        }
        conversating = false;
        inputManager.SendMessage("EnableInput");
        yield return null;
    }

    IEnumerator WaitForTouch()
    {
        Input.multiTouchEnabled = false;
        //Check: it doesn't work!
        while (Input.touchCount == 0 || Input.GetTouch(0).phase != TouchPhase.Began )
        {
            Debug.Log("Touch count: " + Input.touchCount.ToString() +" Touch phase: " + Input.GetTouch(0).phase.ToString());
            yield return null;
        }
        Input.multiTouchEnabled = true;
        yield return null;
    }

Any help would be appreciated. Thanks in advance.

2

The problem was the WaitForTouch() function is calling Input.GetTouch(0) even if there are no touches. Solved with

IEnumerator WaitForTouch()
    {
        while (Input.touchCount == 0 || (Input.touchCount > 0 && Input.GetTouch(0).phase != TouchPhase.Began))
        {
            yield return null;
        }
        yield return null;
    }