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# isPosition(_:atBoundary:inDirection:)

Return whether a text position is at a boundary of a text unit of a specified granularity in a specified direction.

```
func isPosition(_ position: UITextPosition, atBoundary granularity: UITextGranularity, inDirection direction: UITextDirection) -> Bool
```

## Parameters

`position`

A text-position object that represents a location in a document.

`granularity`

A constant that indicates a certain granularity of text unit.

`direction`

A constant that indicates a direction relative to `position`. The constant can be of type UITextStorageDirection or UITextLayoutDirection.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the text position is at the given text-unit boundary in the given direction; <doc://com.apple.documentation/documentation/Swift/false> if it is not at the boundary.

## Discussion

---

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