You would store a font preference in the user tree, as that is a user-specific issue.

您要将字体首选项存储在用户树中，因为这是用户特定的内容。

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When you change a font, you can create a new UITextField at the same time. Or, you can store the new font context and a flag indicating that fonts have changed.

在更改字体时，您可以同时创建一个新的UITextField，或者存储一个新的字体上下文和一个表明字体已经更改的标记。

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In fact, the name itself indicates this: a common use for it is to store user-specific Settings, or preferences, such as font size or window layout. (Of course, you can store anything you want in it.)

事实上，它的名字本身就表明它通常用于存储用户特定的设置或者首选项，如字体大小或者窗口布局(当然，您可以在其中存储任何您想要存储的内容)。

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