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Statics

Write code to implement systems and structures for complex projects.

Level 2 Application scripting

Joy Horvath

Instructional Designer

U_Intermediate_3_Statics.mp4

Learn how to create static variables, methods, and classes. 

Games

Ensure data is preserved throughout an application session by using the Unity DontDestroyOnLoad method

Modify a GameObject with a script that contains the variables to be saved between Scenes

Recognize when to use static classes, singletons, and static variables to implement data persistence

Implement data persistence across scenes and user sessions

Intermediate Scripting

using UnityEngine;
using System.Collections;

public class Enemy
{
    //Static variables are shared across all instances
    //of a class.
    public static int enemyCount = 0;

    public Enemy()
    {
        //Increment the static variable to know how many
        //objects of this class have been created.
        enemyCount++;
    }
}


using UnityEngine;
using System.Collections;

public class Game
{
    void Start () 
    {
        Enemy enemy1 = new Enemy();
        Enemy enemy2 = new Enemy();
        Enemy enemy3 = new Enemy();

        //You can access a static variable by using the class name
        //and the dot operator.
        int x = Enemy.enemyCount;
    }
}

using UnityEngine;
using System.Collections;

public class Player : MonoBehaviour 
{
    //Static variables are shared across all instances
    //of a class. 
    public static int playerCount = 0;

    void Start()
    {
        //Increment the static variable to know how many
         //objects of this class have been created.
        playerCount++;
    }
}


using UnityEngine;
using System.Collections;

public class PlayerManager : MonoBehaviour 
{
    void Start()
    {
        //You can access a static variable by using the class name
        //and the dot operator.
        int x = Player.playerCount;
    }
}

using UnityEngine;
using System.Collections;

public static class Utilities 
{
    //A static method can be invoked without an object
    //of a class. Note that static methods cannot access
    //non-static member variables.
    public static int Add(int num1, int num2)
    {
        return num1 + num2;
    }
}

using UnityEngine;
using System.Collections;

public class UtilitiesExample : MonoBehaviour 
{
    void Start()
    {
        //You can access a static method by using the class name
        //and the dot operator.
        int x = Utilities.Add (5, 6);
    }
}


Statics

1. Statics

Complete this tutorial