Passing other script method as parameter to script from inspector

Unity Engine
1

I have searched far and wide, and I cannot find a solution to my problem, however it seems to be something that would have a solution.

Here’s the thing: I made a UI button object, not the regular one, a complicated one. The thing is, I want to have three of these, all managed by the same script. This script is meant to detect button presses, but it is not a simple OnClick() event thing, because if the player holds the mouse button but removes the cursor from the button, I do not want the click to count, thus I need to use something else than a regular Button component.

The point is, the action that needs to be performed is different for each of these buttons, so I cannot just hardcode which method to use. I need some sort of reference for these methods, accessible from the Unity inspector. I need something very similar to the method choice in EventTrigger, in which you literally choose the method to be executed.

5562856--573472--upload_2020-3-7_22-7-7.png

But I need this to be a parameter to the script, which manages these buttons.

Thanks in advance.

1 Like
2

You could make an enum, and react to that enum with a switch.
There are also other solutions, some are harder to implement than others.
Tell me how knowledgeable you are with the C# in general.

3

Hi! I am not very knowledgeable, I started learning to use C# only in the context of Unity a couple of days ago. I believe, however, that there won’t be any trouble with learning new things quickly if necessary. I have a fair amount of experience with C++ though, and while I know these two languages have a lot of differences, they share some similarities too, so I am familiar with enumerators.

I’d prefer to stay away from a switch of sorts, or anything else that requires hardcoding the method references. It would be very appreciated if there was a way to pass a reference to a method as argument to a script.

I really hope I can get this resolved.

4

well in that case you could use reflection to get what you need.
you basically want to make an enum field, and then use this enum to make a string, with which you can obtain a particular MethodInfo which you can then Invoke.

here’s an example

public class MyReflectiveScript : MonoBehaviour {

  [SerializeField] public SomeMethodsEnum method;

  MethodInfo _methodInfo;

  public enum SomeMethodsEnum {
    Method1,
    Method2,
    Method3
  }

  void Awake() {
    _methodInfo = this.GetType().GetMethod(method.ToString());
    if(_methodInfo == null) Debug.LogWarning($"Method {methodName} does not exist.");
  }

  void Start() {
    _methodInfo?.Invoke(this, null); // you could pass arguments instead of null
  }

  // make sure the methods are public, otherwise you have to set binding flags
  public void Method1() {
    Debug.Log("This is Method1 answering to call.");
  }

  public void Method2() {
    Debug.Log("This is Method2 answering to call.");
  }

  // intentionally no Method3

}

I hope this is what you meant.