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Question by GamarGames · Aug 31, 2017 at 12:08 PM · reflectionevents

Need to filter UnityEvents based on attributes.

I have made a custom UnityEvent and I would like to invoke the listeners that have a specific attribute(Depending on how many fingers are touching the screen I need or I don't need to invoke that event). I found "UnityEventBase.GetValidMethodInfo" in order to get the method for the current listener but I cannot invoke the method because I do not have the parameters from the editor(eg: if the function receives a string and there is a value set in the editor I cannot access it). Is there any way to do this?

This is a tryout but it doesn't work:

InteractionTouches touchesMask = GetMask (evData.Count);
for (int i = 0; i < this.GetPersistentEventCount (); i++) {
object target = this.GetPersistentTarget (i);
MethodInfo method = this.FindMethod_Impl (this.GetPersistentMethodName (i), target);
object[] attributes = method.GetCustomAttributes (typeof(InteractionTouchAttribute), true);
if (attributes.Length == 0)
method.Invoke (target, new object[]{ evData });
else if ((((InteractionTouchAttribute)attributes [0]).AllowedInteraction & touchesMask) == touchesMask)
method.Invoke (target, new object[]{ evData });
}

In this case "this.FindMethod_Impl" only returns the method that has the header with the parameter that is generic in the UnityEvent. I replaced "this.FindMethod_Impl" with "UnityEventBase.GetValidMethodInfo" but as I mentioned before I don't have the arguments so it's completely useless. I just need to take control of whether a listener is being called or not. Nothing more.

Cheers, Gamar

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