今天在学习pureMVC的时候发现了实现单例模式的另一种方法。如下
以前实现单例模式的都是在构造方法里传入另一个类:如下:
public class Model{
public function Model(){
If(instance !=null )throw Errow(SINGLETON_MSG);
Instance = this;
}
public static function getInstance():Model{
if(instance == null)instance = new Model();
return instance;
}
private static var instance:Model;
private const SINGLETON_MSG:String = “Model Singleton already constructed!”;
}
以前实现单例模式的都是在构造方法里传入另一个类:如下:
public class Singleton{
public static var _instance:Singleton;
public function Signleton(pvt:PrivateClass){}
public static function getInstance():Singleton{
if(Singleton._instance == null){
Singleton._instance = new Singleton(new PrivateClass());
}
return singleton._instance;
}
}
Class privateClass{
public function privateClass(){
trace(“privateClass called.”);
}
}