Pause Menu controlled by keys

Upgrade to 4.6. Build a pause menu with the new UI tools. And you are done.

The new UI has built in support for this functionality.

So here it is vultt3rim!

There is plenty of way to do it, but now I'll show you mine! I made it simple with bunch of comments to see what's actually going on! So this C# system will instantly work and maybe teach you some nice things!

BEFORE EVERYTHING: Create 2 C# scripts named "MenuController" and "ButtonScript" and copy/paste the scripts down there!

1. Create an Empty Game Object and name it: "Menu Controller";

2. Drag and drop the script named: "MenuController" in the new object you just created;

3. Tell the MenuController script in Inspector how much you have buttons in your scene in "Buttons Count" field;

4. Now, you will need to add the script "ButtonScript" to every button you have in your scene;

5. Drag the textures in the "Button Normal" & "Button Hover" empty fields;

6. Change the ID's of each individual buttons starting from 1 (Top First = 1, bottom = last one);

It will work perfectly if you take your time doing it well! If you don't like this way, it will be easy to remove. My pleasure!

Math

Here are the scripts!

MenuController.cs

 using UnityEngine;
 using System.Collections;
 
 public class MenuController : MonoBehaviour 
 {
     /*This script has been made by MGProduction!*/
 
     //THE HOW MANY BUTTONS YOU HAVE ON THE SCENE?
     public int buttonsCount;
 
     //THIS IS A VIRTUAL SELECTOR THAT DOES NOTHING ELSE THAN NAVIGATE BETWEEN DIFFERENT VALUES
     public int selector = 1;
 
     // Use this for initialization
     void Start () 
     {
         //I am setting the selector to 0
         selector = 1;
     }
     
     // Update is called once per frame
     void Update () 
     {
         //IF YOUR KEYBOARD IS NOT "AWSD", YOU CAN EASILY CHANGE THIS!
         if (Input.GetKeyUp(KeyCode.S))//DOWN
         {
             //IF MY SELECTOR IS LOWER THAN THE BUTTON COUNT
             if (selector < buttonsCount)
             {selector += 1;}
             //OTHERWISE, RESET IT TO 0!
             else
             {selector = 1;}
         }
 
         //SAME THING BUT INVERTED
         if (Input.GetKeyUp(KeyCode.W))//UP
         {
             if (selector > 1)
             {selector -= 1;}
             else
             {selector = buttonsCount;}
         }
     }
 }
 

ButtonScript.cs

 using UnityEngine;
 using System.Collections;
 
 public class ButtonScript : MonoBehaviour {
 
     /*This script has been made by Mathieu from MGProduction!*/
 
     //Textures selection
     public Texture2D buttonNormal, buttonHover;
 
     //The ID int is about the action the button is going to do!
     //GO SEE THE Selected() function at the bottom
     public int ID;
 
     //IT WILL REQUIRES THE MENU CONTROLLER OBJECT
     private GameObject menuController;
 
     //WILL REFER TO THE MENUCONTROLLER SCRIPT
     private int selector;
 
     //IF THE BUTTON IS SELECTED
     private bool selected;
 
     void Start()
     {
         //I'M SEARCHING THE MENU CONTROLLER BY HIS NAME
         menuController = GameObject.Find ("Menu Controller");
 
         //Let's start with the normal texture
         gameObject.guiTexture.texture = buttonNormal;
     }
 
     // Update is called once per frame
     void Update () 
     {
         //Check it only if it changes! POWER & RAM SAVED TECHNIC
         if (selector != menuController.GetComponent<MenuController> ().selector)
         {
             //Accessing the MenuController script
             selector = menuController.GetComponent<MenuController> ().selector;
         }
 
         //If the MENUCONTROLLER.SELECTOR = MyID then
         if (selector == ID)
         {selected = true;}
         else
         {selected = false;}
 
         //IF YOU ARE SELECTED, RUN FUNCTION Selected()
         if (selected)
         {Selected();}
         else
         {
             //CHANGING TEXTURE 1 TIME
             if (gameObject.guiTexture.texture == buttonHover)
             {gameObject.guiTexture.texture = buttonNormal;}
         }
     }
 
     void OnMouseOver()
     {
         //Mouse Over dominate the selector!
         if (menuController.GetComponent<MenuController> ().selector != ID)
         {menuController.GetComponent<MenuController> ().selector = ID;}
     }
 
     void Selected()
     {
         //CHANGING TEXTURE 1 TIME
         if (gameObject.guiTexture.texture == buttonNormal)
         {gameObject.guiTexture.texture = buttonHover;}
 
         //THIS IS WHERE YOU NEED TO MAKE THE BUTTONS DO SOMETHING!
         if (Input.GetKeyUp(KeyCode.Return) || Input.GetMouseButtonUp(0))
         {
             //THIS IS WHERE YOU WANT TO ACTUALLY DO SOMETHING WITH YOUR BUTTONS!
             switch (ID)
             {
             case 1:
                 //DO WHAT YOU WANT THE TOP FIRST BUTTON TO DO?
                 //EXEMPLES:
                 //Application.LoadLevel("MyAwesomeLevel");
                 Debug.Log("Button "+ID.ToString()+" is in action");
                 break;
 
             case 2:
                 //DO WHAT YOU WANT THE SECOND BUTTON TO DO
                 Debug.Log("Button "+ID.ToString()+" is in action");
                 break;
 
             case 3:
                 //ETC
                 Debug.Log("Button "+ID.ToString()+" is in action");
                 break;
 
             case 4:
                 Debug.Log("Button "+ID.ToString()+" is in action");
                 break;
 
             case 5:
                 //IF EXIT BUTTON:
                 //Application.Quit();
                 Debug.Log("Button "+ID.ToString()+" is in action");
                 break;
 
             //CLEAN UP THIS SWITCH WITH WHAT YOU NEED! LESS OR MORE?
             //IF YOU HAVE ONLY 
             }
         }
     }
 }