How to call StartCoroutine in OnApplicationQuit?

Hi there.

Unity version is 5.1.2.

I'd like to call method which return IEnumerator in OnApplicationQuit method.
Because, I want to save game data which call Coroutine method when game was stopped.

So, I call IEnumerator method in OnApplicationQuit. but it stopped.

I tested it in UnityEditor.

It is my snippet

Code (CSharp):

1.     IEnumerator SaveGame()
2.     {
3.         var i = 0;
4.         while(true)
5.         {
6.             Debug.LogError(i);
7.             if(i > 100)
8.             {
9.                 yield break;
10.             }
11.             i++;
12.             yield return null;
13.         }
14.     }

Code (CSharp):

1.     void OnApplicationQuit(){
2.         Debug.Log("OnApplicationQuit");
3.         #if UNITY_IOS || UNITY_EDITOR
4.         StartCoroutine(SaveGame());
5.         #endif
6.     }

SaveGame method is test.
I play UnityEditor and Stop. OnApplicationQuit was called.
however, Debug.LogError(i) wrote down only once "0" log.

I guess GameObject was destroyed when I stop UnityEditor?
Could you tell me wait i variable became over 100?

It is for iOS but I test in UnityEditor.I also develop for Android..

 

Yes, your GameObjects are destroyed once you stop play mode.

I don't think you get OnApplicationQuit called on iOS anyway. Perhaps you need OnApplicationPause or OnApplicationFocus? These will be called when you send the app to the background, although note that your coroutine will not run while the app is in the background - you'll get the first frame only, but it will continue once the app is restored.

 

Last time I checked OnApplicationQuit is not called on iOS. You also shouldn't rely on the app closing to save data, as the app can close at any time. You could use OnApplicationPause as @andymads suggested, but this won't catch the case if your app crashes (due to memory or an uncaught exception).

 

Thank you for replying.
I called like this. it worked good in UnityEditor.

Code (CSharp):

1. var e = SaveGame();
2. while (e.MoveNext()){}

 

Thank you for replying.
But, iOS can called OnApplicationQuit method in Unity 5.0.2f1 before. What version do you use?

However Android could not call OnApplicationQuit method so, I wrote my code in OnApplicationPause

Code (CSharp):

1. void OnApplicationPause(boolpauseStatus){
2.     if(pauseStatus){
3.         // some saving code.
4.     }
5. }