RuntimeInitializeOnLoadMethod inside define not working

Questions & Answers
1

Hi,
I found today in my project that RuntimeInitializeOnLoadMethod inside #if UNITY_IOS && !UNITY_EDITOR on IOS was not working when.

Platform IOS
XCode 9.4
Unity 2017.4.6f1 LTS

So this code showed nothing:

public static class MyStaticClass
{

#if UNITY_IOS && !UNITY_EDITOR

    [RuntimeInitializeOnLoadMethod]
    private static void Initialize()
    {
        Debug.Log("Init on load");
    }

#endif

}

And this printed message as it was supposed to

public static class MyStaticClass
{

    [RuntimeInitializeOnLoadMethod]
    private static void Initialize()
    {
#if UNITY_IOS && !UNITY_EDITOR
        Debug.Log("Init on load");
#endif
    }

}

I believe this is not expected behavior. Am I missing something?

2

This one just hit me too. I doubt it’s expected behaviour. Maybe there’s some souce code preprocessing step that’s out of order or something.

In any case, I opted to just do this:

#if UNITY_IOS && !UNITY_EDITOR
private static void InitializeImpl() {
    Debug.Log("Init on load");
}
#else
private static void InitializeImpl() {
    /* empty */
}
#endif

[RuntimeInitializeOnLoadMethod]
private static void Initialize() {
    InitializeImpl();
}