unity游戏开发中用到的设计模式列出详细示例代码

Unity游戏开发中常用的设计模式有：工厂模式、单例模式、策略模式、观察者模式、模板模式等。下面给出示例代码：工厂模式：
public interface ICarFactory
{
Car CreateCar();
}
public class BMWFactory : ICarFactory
{
public Car CreateCar()
{
return new BMWCar();
}
}单例模式：
public class Singleton
{
private static Singleton instance;

private Singleton() { }

public static Singleton Instance
{
get
{
if (instance == null)
{
instance = new Singleton();
}
return instance;
}
}
}策略模式：
public interface IStrategy
{
void Execute();
}
public class StrategyA : IStrategy
{
public void Execute()
{
// Execute A strategy
}
}观察者模式：
public class Subject
{
private List<Observer> observers = new List<Observer>();

public void Attach(Observer observer)
{
observers.Add(observer);
}

public void Detach(Observer observer)
{
observers.Remove(observer);
}

public void Notify()
{
foreach (var observer in observers)
{
observer.Update();
}
}
}模板模式：
public abstract class Game
{
public abstract void Initialize();
public abstract void StartPlay();
public abstract void EndPlay();

public final void Play()
{
Initialize();

StartPlay();

EndPlay();
}
}