如何访问文本字段单元格中的 NSNumberFormatter？
在 XCode 3.2.x 的 Interface Builder 中，这非常简单，选择文本单元格会显示一个格式化程序的小图标，可以选择该图标来在属性窗格中配置格式化程序。
现在在 XCode 4 中，格式化程序图标消失了！如果我从库中拖动带有 NSTextFormatter 的 NSTextField 实例，或者将 NSTextFormatter 拖放到现有单元格中，那么我无法找到选择格式化程序来配置它！
除此之外，Core Data 实体 UI 原型助手已被删除，我想说 IB 集成到 XC4 充其量只是半成品！
这有人运气好吗？
In XCode 3.2.x's Interface Builder this was simple enough, selecting the text cell displayed a small icon for the formatter that could be selected to configure the formatter in the attributes pane.
Now in XCode 4, the formatter icon is gone! If I drag an instance of NSTextField with an NSTextFormatter from the library OR drop and NSTextFormatter into an existing cell there is no way I can figure out to select the formatter to configure it!
Add to this the fact that Core Data entities UI prototype assistant was removed and I would say IB integration into XC4 is half baked at best!
Any luck with this anyone?
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您可以从窗口顶部的跳转栏访问格式化程序。如果您选择添加了格式化程序的组件，请单击并按住，它将变成一个下拉菜单。移至子菜单，格式化程序应显示在您可以选择的位置。
看来您可以将整个用户界面视为一组级联菜单。
现在删除格式化程序，这是一个不同的问题......
...进一步查看后发现：
xcode4 中 IB 窗口的左侧是一个“dock”，其中包含文件所有者、第一响应者等的图标。此列是可扩展的，当您这样做时将显示分层结构nib 文件的视图。您可以像取景器一样进行导航。
另外，请参阅这篇文章：
http://developer.apple.com/library/mac/#documentation/ToolsLanguages/Conceptual/Xcode4UserGuide/InterfaceBuilder/InterfaceBuilder.html%23//apple_ref/doc/uid/TP40010215-CH6-SW3
you can access the formatter from the jump bar at the top of the window. if you select the component you added the formatter to, click and hold and it will turn into a drop down menu. move to the sub menu and the formatter should show up where you can select it.
it seems that you can treat the whole ui like a cascading set of menus that way.
now removing the formatter, that's a different question...
... which after further looking revealed:
over on the left side of the IB window in xcode4 is a 'dock' containing the icons for file owner, first responder etc. this column is expandable, and when you do so will show a hierarchical view of the nib file. through which you can navigate like the finder.
also, see this article:
http://developer.apple.com/library/mac/#documentation/ToolsLanguages/Conceptual/Xcode4UserGuide/InterfaceBuilder/InterfaceBuilder.html%23//apple_ref/doc/uid/TP40010215-CH6-SW3