/* * variable which is start by '~' is local. * by '&', that is for global but not saved to file. * by '#', that is for global and saved to file. */ 通过变量的不同标识，来对变量进行系统管理。局部变量，通过定义全局变量(非保存)，全局变量(保存)三种类型属性，之后只要实例化VariableManager类就能轻松实用，在实际项目中实用比较普遍。