An object that provides textual context to a custom keyboard.
Through conformance to the UIKeyInput protocol, a text document proxy enables a custom keyboard (which is based on the UIInputViewController class) to insert and delete text, to adjust the position of the insertion point, and to determine whether a text input object is empty. The text document proxy uses the keyboard's textDocumentProxy property to do this.
A read-only term pair, available within a lexicon object, for use by a custom keyboard.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.