佳为好友

The Apple docs describe this exception:

On the iPad, if a view controller modally presents its view using the "form sheet" style, the keyboard, once shown, is not hidden until the user taps the dismiss key or the modal view controller is programmatically dismissed. The purpose of this behavior is to avoid excessive animations as a user moves between views that are largely, but not entirely, text fields.

Which happens to apply here (modal form sheet on iPad). It's apparently just not possible to dismiss the keyboard in this case. Super. :\

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