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# selectionWillChange(_:)

Tells the input delegate when the selection is about to change in the document.

```
func selectionWillChange(_ textInput: (any UITextInput)?)
```

## Parameters

`textInput`

The document instance whose class adopts the UITextInput protocol.

## See Also

[`textWillChange(_:)`](/documentation/UIKit/UITextInputDelegate/textWillChange(_:))

Tells the input delegate when text is about to change in the document.


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