---
title: "CFAttributedStringGetStatisticalWritingDirections(_:_:_:_:_:)"
framework: Core Foundation
role: symbol
role_heading: Function
platforms: [iOS 26.0+, iPadOS 26.0+, Mac Catalyst 26.0+, macOS 26.0+, tvOS 26.0+, visionOS 26.0+, watchOS 26.0+]
path: "corefoundation/cfattributedstringgetstatisticalwritingdirections(_:_:_:_:_:)"
---

# CFAttributedStringGetStatisticalWritingDirections(_:_:_:_:_:)

## Declaration

```swift
func CFAttributedStringGetStatisticalWritingDirections(_ attributedString: CFAttributedString!, _ range: CFRange, _ baseDirection: Int8, _ bidiLevels: UnsafeMutablePointer<UInt8>!, _ baseDirections: UnsafeMutablePointer<UInt8>!) -> 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.