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Android IL2CPP Error.

Discussion in 'Android' started by wiyi, Feb 25, 2016.

  1. wiyi

    wiyi

    Joined:
    Feb 20, 2013
    Posts:
    17
    [To marshal a manged method,please add an attribute named "MonoPInvokeCallback' to the method definition.]

    -----------------------------------------------------------------------------------------
    When I add this
    [MonoPInvokeCallback(typeof(GotyeCallback))]
    static void Test(int event_code, IntPtr args){}

    build error:
    [Assets/TEST1.cs(1018,18): error CS0246: The type or namespace name `MonoPInvokeCallback' could not be found. Are you missing a using directive or an assembly reference?]
     
    wiyi, Feb 25, 2016
    #1

  2. wiyi

    wiyi

    Joined:
    Feb 20, 2013
    Posts:
    17
    unity3d 5.3.2f1
     
    wiyi, Feb 25, 2016
    #2

  3. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,775
    @wiyi

    Unfortunately the whole MonoPInvokeCallback thing is a bit of a hack to make calls like this work with an AOT compiler. You can poke around on Google for the long and sordid story if you would like to. :)

    The short answer is that you need to implement the MonoPInvokeCallbackAttribute in your code somewhere. You can use this implementation:

    Code (CSharp):
    1. public class MonoPInvokeCallbackAttribute : System.Attribute
    2. {
    3.      private Type type;
    4.      public MonoPInvokeCallbackAttribute( Type t ) { type = t; }
    5. }
    Some more details are available here: http://answers.unity3d.com/questions/191234/unity-ios-function-pointers.html
     
    JoshPeterson, Feb 25, 2016
    #3