# CFAttributedStringGetStatisticalWritingDirections(_:_:_:_:_:) ``` func CFAttributedStringGetStatisticalWritingDirections(_ attributedString: CFAttributedString!, _ range: CFRange, _ baseDirection: Int8, _ bidiLevels: UnsafeMutablePointer!, _ baseDirections: UnsafeMutablePointer!) -> Bool ``` ## Discussion \discussion If baseDirection is not NSWritingDirectionNatural, result comes from CFAttributedStringGetBidiLevelsAndResolvedDirections; otherwise, it fills bidiLevels by applying a statistical approach (a paragraph is RTL if 40% or more of its words are RTL) to the characters in range. Returns true if the result is not uni-level LTR (in other words, needing further Bidi processing). baseDirection is NSWritingDirection (NSWritingDirectionNatural, NSWritingDirectionLeftToRight, and NSWritingDirectionRightToLeft). Understands NSWritingDirectionAttributeName values. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)