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[Uncle Scotty]

I have put together a basic Unity project that has a simple button to switch between scenes. This project should help Unity beginners understand the basics of making 2D User Interface (UI) buttons from scratch, using sprites, a 2D collider, text meshes, and mouse functions. The same basic concepts can be applied to create custom 3D buttons.

You can download a zip of the project files from: https://dl.dropboxusercontent.com/u/52637256/AnachronicDesigns/Tutorials/Projects/BasicMenu.zip

There are many different ways to create UI elements in Unity, including using the new built-in UI tools in Version 4.6, or Asset Store products like NGUI, Daikon Forge, and InControl.

Thisproject, however, is a simple way to get started with making a custom UI from scratch, and can help people learn some of the basic Unity components. There is only one script in the project, which is as follows:

Code:

using UnityEngine;
using System.Collections;

public class Button : MonoBehaviour {

	public GameObject highlightSprite;

	public enum buttonType {Scene1, Scene2};
	public buttonType typeOfButton;

	// Use this for initialization
	void Start () {
		highlightSprite.renderer.enabled = false;
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	void OnMouseEnter() {
		Debug.Log ("Mouse entered collider");
		highlightSprite.renderer.enabled = true;
	}

	void OnMouseExit() {
		Debug.Log ("Mouse exited collider");
		highlightSprite.renderer.enabled = false;
	}

	void OnMouseDown() {
		Debug.Log ("Mouse clicked on collider");
		switch (typeOfButton) {
		case buttonType.Scene1:
			Application.LoadLevel ("Scene2");
			break;
		case buttonType.Scene2:
			Application.LoadLevel ("Scene1");
			break;
		default:
			break;
		}
	}
}

Good luck and happy developing!