c# - 面向对象编程正确使用接口(interface)

Question

我正在尝试为一款游戏设计几个类，但我不确定我做得对不对。

我有两个类:Actor 和 Building。它们有几个子类:Policeman、Fireman 和 PoliceStation、FireStation。

我希望能够将所有这些项目放在一个列表中以供以后迭代，因此我添加了一个基类:GameEntity。
所以我所拥有的是:

public abstract class GameEntity: 
{
    public GameEntity()
    {

    }       
}

public class Actor: GameEntity
{
    public int _speed;
    public TileSprite _UI;

    public Actor()
    {

    }

    public bool CollidesWith(Vector2 pos)
    {
        //Do stuff here
    }

    public virtual void OnClick()
    {
        //Do stuff here
    }

    public void DoActing()
    {

    }
}

public class Policeman: Actor
{
    public Policeman()
    {
        _speed = 10;
    }

    public override void OnClick()
    {
        //Do stuff
    }
}

public class Building: GameEntity
{
    public TileSprite _UI;

    public Building()
    {

    }

    public bool CollidesWith(Vector2 pos)
    {
        //Do stuff here
    }

    public virtual void OnClick()
    {
        //Do stuff here
    }

    public void DoBuilding()
    {

    }
}

public class PoliceStation: Building
{
    public PoliceStation()
    {

    }

    public override void OnClick()
    {
        //Do stuff
    }
}

现在，我希望能够做到这一点:

List<GameEntity> Entities = new List<GameEntity>();

Actor a1 = new PoliceMan();
Building b1 = new PoliceStation

Entities.Add(a1);
Entities.Add(b1);

foreach(GameEntity ent in Entities)
{
    if (ent.CollidesWith(something))
    {
        ent.OnClick();

        //If Actor then do 
        ent.DoActing();

        //If Building then do
        ent.DoBuilding();
    }
}

现在，为了做最后一点，我最好实现一个包含 OnClick 和 CollidesWith 的接口(interface)，还是可以通过继承来实现？如果是这样，我该怎么做？

干杯。

Answer 1

这只是给你一个想法，我想这就是你所需要的。

 public interface IGameEntity
    {
        bool CollidesWith();
        void OnClick();
        void DoActing();
    }
  public class Actor : IGameEntity { //Interface implemented }
  public class Building: IGameEntity { //Interface implemented }
  public class Policeman: IGameEntity { //Interface implemented }
  public class Fireman: IGameEntity { //Interface implemented }
  public class FireStation: IGameEntity { //Interface implemented }

在你的客户端对象中做这样的事情:

List<IGameEntity> entities = new List<IGameEntity>()
{
    new Actor(), 
    new Building(), 
    new Policeman(), 
    new Fireman(), 
    new Fireman()
};
foreach (IGameEntity entity in entities)
{
    entity.CollidesWith();
    entity.OnClick();
    entity.DoActing();
}