Late OnEnable for DontDestroyOnLoad MonoBehaviour

Questions & Answers
1

I have a MonoBehaviour persistent between levels (DontDestroyOnLoad). Each time a new level is loaded I need to call some code on it. I would use OnEnable or OnLevelWasLoaded but I also need to make sure the code is called after all Awake calls. So, how can I call some code on a persistent MonoBehaviour after all Awake calls each time a new level is loaded?

My current solution is the following:

private bool _lateEnable = false;

void Awake() {
    // ...
    DontDestroyOnLoad(this.gameObject);
    // ...
}

void OnEnable() {
	_lateEnable = true;
    // ...
}

void Update() {
	if(_lateEnable){
		OnLateEnable();
		_lateEnable = false;
	}
    // ...
}

void OnLateEnable() {
	// Code called after all Awakes
}
2

You could use a coroutine, which yield one (or more) frame:

void OnLevelWasLoaded()
{
  StartCoroutine(LateEnable());
}

IEnumerator LateEnable()
{
    // wait one frame
    yield return null;

    // code called after all awakes
}

You may also find Script Execution Order useful, in certain cases.