Singleton 记录不同level的公共信息，玩家名字，经验等

From 呼吸的草稿本

http://www.unifycommunity.com/wiki/index.php?title=Singleton

The non-component example

<csharp>public class MySingleton { private static MySingleton instance;

public MySingleton() { if( instance != null ) { Debug.LogError( "Cannot have two instances of singleton. Self destruction in 3..." ); return; }

instance = this; }

public static MySingleton Instance { get { if( instance == null ) { new MySingleton(); }

return instance; } } }</csharp>