Get Persistent Method Name(int index);

How do i use Get Persistent Method Name(int index);

 

It looks like most of those functions are now internal use only or deprectated. In Unity 5.40f3 the only valid I can use is:

• GetValidMethodInfo(Object obj, string name, System.Type[] arguments)

So if you know that ButtonOne had a callback function on it called ButtonPressed(int) you could do this:

Code (CSharp):

1. delegate void HandlerDelegate(int value);
2. GameObject button;  // assign this in editor, or use FindObject
3.  
4. void SomeFunction()
5. {
6.        System.Type[] arguments = new System.Type[1];
7.        arguments[0] = typeof(int);
8.        HandlerDelegate myHandle = UnityEventBase.GetValidMethodInfo(button, "ButtonPressed",arguments);
9. }

I haven't actually tested if this works but seems like it would. Why do you want to use GetPersistentMethodName?

 

This. It's a legit method for dealing with events. But without a why it's hard to answer your question.

https://docs.unity3d.com/ScriptReference/Events.UnityEventBase.GetPersistentMethodName.html

 

I realize the documentation lists quite a few functions under UnityEventBase GetPersistentMethodName being one of them. However (at least using 5.4.0f3) if i tried to use UnityEvent, or UnityEventBase the only exposed method is the one I listed above:

• GetValidMethodInfo

I was unable to get access to GetPersistentMethodName. If you can I'd like to know what using, or subclass you used to get access to it.

 

Hmm, I was just going by the docs, it's odd for them to be different to actual Unity.

It may be an editor only function?

 

Interesting. I'm using 5.4.1f1 and I can use them just fine.
Please note that these are member methods, so you need to have an object of UnityEvent (or UnityEventBase) type.

Example:

Code (CSharp):

1. public class MyClassWithEvent : MonoBehaviour
2. {
3.     public UnityEvent MyEvent;
4.  
5.     void Update()
6.     {
7.         if (MyEvent.GetPersistentEventCount() == 1 && MyEvent.GetPersistentMethodName(0) == "Firestrike")
8.         {
9.             MyEvent.Invoke();
10.         }
11.     }
12. }

Above code checks that:
1. MyEvent has exactly one Persistent Listener (added on Inspector, not on runtime).
2. Method that is subscribed as the first persistent listener is Firestrike
3. If yes, fires it every frame.

I don't see much use for it, or I'm misinterpreting it. Haven't really used it anywhere in practice, as I can't see a use case for it.

 

Ah I tried to instantiate a UnityBaseEvent and got an error, Didn't try to instantiate a UnityEvent. So I gueuss GetValidMethodInfo must be a static event you can access from the just the Class itself without needing an object. The rest of them of course need an instantiated UnityEvent.

Neither could I which is why I asked the OP why he wanted to use this? There maybe something he's trying to do with this, that is done in a much better way.