[Reflection] Method selection with an editor script

I want to be able to select a method from a class using an editor script, save/serialize that selection, then call that method when the game is playing. I've got as far as using reflection to get a list of the methods I want but I'm unsure on how best to save the selection and invoke the method at runtime.

I tried using Delegate.CreateDelegate() to bind the selection but to no avail so far.

Code (csharp):

1.  
2. using UnityEngine;
3. using UnityEditor;
4. using System.Collections.Generic;
5. using System.Reflection;
6.  
7.  
8. [CustomEditor(typeof(FunctionTest))]
9. public class InspectorFunctionTest :  Editor
10. {
11.     FunctionTest owner;
12.    
13.     List<MethodInfo> methods;
14.    
15.  
16.     void OnEnable()
17.     {
18.         owner = (FunctionTest)target;
19.            
20.         // get methods 
21.         MethodInfo[] allMethods;
22.         allMethods = owner.GetType().GetMethods(BindingFlags.Instance | BindingFlags.NonPublic);
23.        
24.        
25.         //...do some filtering and save results to method List
26.     }  
27.    
28.    
29.     public override void OnInspectorGUI()
30.     {      
31.         //...use GUI functions to select the right MethodInfo from List
32.                
33.        
34.         if(GUI.changed)
35.         {
36.             // save selection to the owner in a way that can be called at runtime
37.            
38.             EditorUtility.SetDirty(owner);
39.         }
40.     }
41. }
42.  

Thanks.

 

This method receives an object and invoke its method called "p_method" with 0 or more argments.

Code (csharp):

1.  
2.  
3.         static private BindingFlags _flags = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static;
4.  
5.         static public object Invoke(object p_target, string p_method, params object[] p_args)
6.         {
7.             Type t = p_target.GetType();
8.             MethodInfo mi = t.GetMethod(p_method, _flags);
9.             if (mi == null) return null;
10.             return mi.Invoke(p_target, p_args);
11.         }
12.  
13. //Example
14. Invoke(gameObject,"SetActiveRecursively",true)
15.  
16.  

 

I was bored, here's a complete example of a behaviour (FunctionDemo) and it's associated editor (FunctionDemoEditor):

FunctionDemo.cs

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.Reflection;
4.  
5. public class FunctionDemo : MonoBehaviour
6. {
7.     public string MethodToCall;
8.  
9.     void Start()
10.     {
11.         typeof(FunctionDemo)
12.             .GetMethod(MethodToCall, BindingFlags.Instance |BindingFlags.NonPublic | BindingFlags.Public)
13.             .Invoke(this, new object[0]);
14.     }
15.  
16.     void Update()
17.     {
18.  
19.     }
20.  
21.     void Foo()
22.     {
23.         Debug.Log("Foo");
24.     }
25.  
26.     void Bar()
27.     {
28.         Debug.Log("Bar");
29.     }
30. }
31.  

FunctionDemoEditor.cs

Code (csharp):

1.  
2.  
3. using UnityEngine;
4. using UnityEditor;
5. using System.Linq;
6. using System.Collections;
7. using System.Reflection;
8. using System;
9.  
10. [CustomEditor(typeof(FunctionDemo))]
11. public class FunctionDemoEditor : Editor
12. {
13.     static string[] methods;
14.     static string[] ignoreMethods = new string[] { "Start", "Update" };
15.  
16.     static FunctionDemoEditor()
17.     {
18.         methods =
19.             typeof(FunctionDemo)
20.             .GetMethods(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public) // Instance methods, both public and private/protected
21.             .Where(x => x.DeclaringType == typeof(FunctionDemo)) // Only list methods defined in our own class
22.             .Where(x => x.GetParameters().Length == 0) // Make sure we only get methods with zero argumenrts
23.             .Where(x => !ignoreMethods.Any(n => n == x.Name)) // Don't list methods in the ignoreMethods array (so we can exclude Unity specific methods, etc.)
24.             .Select(x => x.Name)
25.             .ToArray();
26.     }
27.  
28.     public override void OnInspectorGUI()
29.     {
30.         FunctionDemo obj = target as FunctionDemo;
31.  
32.         if (obj != null)
33.         {
34.             int index;
35.  
36.             try
37.             {
38.                 index = methods
39.                     .Select((v, i) => new { Name = v, Index = i })
40.                     .First(x => x.Name == obj.MethodToCall)
41.                     .Index;
42.             }
43.             catch
44.             {
45.                 index = 0;
46.             }
47.  
48.             obj.MethodToCall = methods[EditorGUILayout.Popup(index, methods)];
49.         }
50.     }
51. }
52.  

 

Awesome, thanks a lot guys.

 

@fholm i'm trying to get the name of all methodes of all monoscripts on a defined gameObject ,the problem is that i'm getting all monobahaviours methods as well even with the flag set ,i tried the

Code (CSharp):

1. .Where(x => x.DeclaringType == typeof(FunctionDemo)) // Only list methods defined in our own class

but it doesn't seam to work , do you have any solution to this thanx

Code (CSharp):

1.  
2.         GameObject Obj = this.gameObject;
3.  
4.  
5.         MonoBehaviour[] allBehav = Obj.GetComponents<MonoBehaviour>() as MonoBehaviour[];
6.  
7.         foreach (var Behav in allBehav)
8.         {
9.             //  Debug.Log( Behav.GetType().ToString());
10.             MethodInfo[] classMethods = Behav.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Public |  BindingFlags.NonPublic);
11.             foreach (var Method in classMethods)
12.             {
13.                 Debug.Log("Methode name" + Method.Name);
14.             }
15.  
16.         }
17.  

 

Issue fixed

Code (CSharp):

1.        
2.  
3.    using System.linq
4. GameObject Obj = this.gameObject;
5.  
6.         MonoBehaviour[] allBehav = Obj.GetComponents<MonoBehaviour>() as MonoBehaviour[];
7.  
8.         foreach (var Behav in allBehav)
9.         {
10.             //  Debug.Log( Behav.GetType().ToString());
11.             Type currentType = Behav.GetType();
12.              IEnumerable <MethodInfo>  classMethods = currentType.GetMethods(BindingFlags.Instance | BindingFlags.NonPublic)
13.                 .Where(x => x.DeclaringType ==  currentType  );
14.  
15.             foreach (var Method in classMethods)
16.             {
17.                 Debug.Log("Methode name" + Method.Name);
18.             }
19.  
20.         }