In fact, you can substitute the base class for every node object, giving your whole application custom behaviors.

事实上，您可以置换每种节点对象的基类，从而能够定制整个应用程序的行为。

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This class member will contain the application object that stores employee data or organizational data depending on what the TreeItem widget represents.

根据TreeIte m部件代表的内容不同，这个类成员将包含存储职员数据或组织数据的应用程序对象。

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In the OneViewController class, you defined an object to test the application in "unplugged" mode.

在oneviewcontroller类中，您定义了一个用来在“未连接”模式中测试应用程序的对象。

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