列挙型でゲームのステートを持ち、その変更を受け取ってConsoleにDebug.Logを出すUniRxのサンプル

UniRxChangeStateTest.cs

using UnityEngine;
using UniRx;
using UnityEngine.UI;

public enum GameState {
	STATE_1,
	STATE_2,
	STATE_3
}

public class UniRxChangeStateTest : MonoBehaviour
{
	[SerializeField]
	private Button button1;
	[SerializeField]
	private Button button2;
	[SerializeField]
	private Button button3;

	public ReactiveProperty<GameState> currentState { get; private set; }

	void Awake()
	{
		currentState = new ReactiveProperty<GameState> (GameState.STATE_1);
		currentState.Subscribe (state => {
				Debug.Log("change " + state.ToString("g"));
			});

		button1.OnClickAsObservable ()
			.Subscribe (_ => {
				Debug.Log("Click Button 1");
				currentState.Value = GameState.STATE_1;
			});
		button2.OnClickAsObservable ()
			.Subscribe (_ => {
				Debug.Log("Click Button 2");
				currentState.Value = GameState.STATE_2;
			});
		button3.OnClickAsObservable ()
			.Subscribe (_ => {
				Debug.Log("Click Button 3");
				currentState.Value = GameState.STATE_3;
			});
	}
}