官方教學網址 :
http://unity3d.com/learn/tutorials/modules/intermediate/scripting/inheritance
Fruit Class
using UnityEngine;
using System.Collections;
//This is the base class which is
//also known as the Parent class.
public class Fruit
{
public string color;
//This is the first constructor for the Fruit class
//and is not inherited by any derived classes.
public Fruit()
{
color = "orange";
Debug.Log("1st Fruit Constructor Called");
}
//This is the second constructor for the Fruit class
//and is not inherited by any derived classes.
public Fruit(string newColor)
{
color = newColor;
Debug.Log("2nd Fruit Constructor Called");
}
public void Chop()
{
Debug.Log("The " + color + " fruit has been chopped.");
}
public void SayHello()
{
Debug.Log("Hello, I am a fruit.");
}
}
Apple Class
using UnityEngine;
using System.Collections;
//This is the derived class whis is
//also know as the Child class.
public class Apple : Fruit
{
//This is the first constructor for the Apple class.
//It calls the parent constructor immediately, even
//before it runs.
public Apple()
{
//Notice how Apple has access to the public variable
//color, which is a part of the parent Fruit class.
color = "red";
Debug.Log("1st Apple Constructor Called");
}
//This is the second constructor for the Apple class.
//It specifies which parent constructor will be called
//using the "base" keyword.
public Apple(string newColor) : base(newColor)
{
//Notice how this constructor doesn't set the color
//since the base constructor sets the color that
//is passed as an argument.
Debug.Log("2nd Apple Constructor Called");
}
}
FruitSalad Class
using UnityEngine;
using System.Collections;
public class FruitSalad : MonoBehaviour
{
void Start ()
{
//Let's illustrate inheritance with the
//default constructors.
Debug.Log("Creating the fruit");
Fruit myFruit = new Fruit();
Debug.Log("Creating the apple");
Apple myApple = new Apple();
//Call the methods of the Fruit class.
myFruit.SayHello();
myFruit.Chop();
//Call the methods of the Apple class.
//Notice how class Apple has access to all
//of the public methods of class Fruit.
myApple.SayHello();
myApple.Chop();
//Now let's illustrate inheritance with the
//constructors that read in a string.
Debug.Log("Creating the fruit");
myFruit = new Fruit("yellow");
Debug.Log("Creating the apple");
myApple = new Apple("green");
//Call the methods of the Fruit class.
myFruit.SayHello();
myFruit.Chop();
//Call the methods of the Apple class.
//Notice how class Apple has access to all
//of the public methods of class Fruit.
myApple.SayHello();
myApple.Chop();
}
}
