如何定义单件类

复制内容到剪贴板

代码:

package  flash023
{
    
    /**
     * ...
     * @author FLASH023
     * @date 2010-2-24 16:48
     */
    public dynamic class Singleton extends Object  
    {
        private static var instance:Singleton;
        public function Singleton(_s:Singletoner=null):void {
            if (!_s) {
                throw new Error("只能用getInstance() 来获得实例");
            }
        }
        public static function getInstance():Singleton {
            if (!instance ) {
                instance =new Singleton(new Singletoner);                
            }
            return instance;            
        }
    }
    
}
class Singletoner {
    
}