UnityEventManager

Summary An Event System is a fast way to communicate GameObject with the advantage that they don't need to know each other.

Usage

1. Put the desire event at eEvent.

public enum eEvent {
    RandomEventName,
    MAX
}

Enums are used to avoid errors, and helps searching event triggers and listeners.

2. Create the function that listens to the Event Manager

void Foo(object[] args)
{
}

The array is for event communication, as bonus it's easier to identify an event function.

2.1) Listen to the Event Manager

void OnEnable()
{
     EventManager.Listen(eEvent.RandomEventName,OnFoo);
}

2.2) Important When you register a listener you need to unregister it.

void OnDisable()
{
     EventManager.Remove(eEvent.RandomEventName,OnFoo);
}

A good practice is, if you register at OnEnable unregister at OnDisable. It works the same way with Awake and OnDestroy.

You can register a listener any place but always unregister it.

3. Trigger the event with

void OnDisable()
{
     EventManager.Trigger(eEvent.RandomEventName); //Trigger the listeners with null parameters.
     EventManager.Trigger(eEvent.RandomEventName, withParameters);
}

Trigger with the parameter enum, and all the parameters that we want to send.