基本概念:

使用:

    class Gameobject 
    {
    }
    class Player :Gameobject 
    {
               public void Attk()
        {

        }
    }
    class Master : Gameobject 
    {
                public void Attk()
        {

        }
    }
    class Boss : Gameobject 
    {
                 public void Attk()
        {

        }
    }
    internal class Program
    {
        static void Main(string[] args)
        {
            Gameobject master = new Master();
 
        }
    }

但有个问题,我在用的时候没法用master.Attk("攻击") 因为master是属于Gameobject的 于是就有了is 和as;

is和as:

概念:

使用:

    static void Main(string[] args)
    {
        Gameobject master = new Master();
        if (master is Master) //判断是不是这个类型的
        {
            Master m = new Master();//转化类型
            m = master as Master;
            master.Attk()
        }

    }
    
    
    

还有更简单的写法,不用中间值 m,直接(master as Master).Attk()

看起来我们不需要判定,因为我们一眼就看出来,是不是这个类的,但

           Gameobject[] objs = { new Player(), new Master(), new Boss() };
            for (int i = 0; i < objs.Length; i++)
            {
                if (objs[i] is Master)
                {
                    (objs[i] as Master).Attk();
                }
                else if(...)
                {
                    ...
                }
                ...
            }

在数组里数量多了就不好看出来,节省时间就可以用判断.

总结:

练习:

题目二
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 继承
{
    class Master
    {
        public void Attk() { }
    }
    class Boss : Master
    {
        public void Skill()
        { }
    }
    class Goblin : Master
    {
        

    }
    internal class Program
    {
        static void Main(string[] args)
        {

            Master[] master = new Master[10];

            for (int i = 0; i < master.Length; i++)
            {
                Random r = new Random();
                int num = r.Next(0, 2);
                if (num == 0)
                {
                    master[i] = new Boss();
                }
                else
                {
                    master[i] = new Goblin();
                }
            }
            for (int i = 0; i > master.Length; i++)
            {
                if (master[i] is Boss)
                {
                    (master[i] as Boss).Skill();

                }
                else
                {
                    (master[i] as Goblin).Attk();
                }
            }
        }
    }
}