# CFAttributedStringGetAttribute(_:_:_:_:) Returns the value of a given attribute of an attributed string at a specified location. ``` func CFAttributedStringGetAttribute(_ aStr: CFAttributedString!, _ loc: CFIndex, _ attrName: CFString!, _ effectiveRange: UnsafeMutablePointer!) -> CFTypeRef! ``` ## Parameters `aStr` The attributed string to examine. `loc` The location in `str` at which to determine the attributes. `loc` must not exceed the bounds of `str`. `attrName` The name of the attribute whose value you want to determine. `effectiveRange` If not `NULL`, upon return contains a range including `loc` over which exactly the same set of attributes apply as at `loc`. ## Return Value The value of the specified attribute at the specified location in `str`. Ownership follows the [The Get Rule](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html#//apple_ref/doc/uid/20001148-SW1). ## Discussion For performance reasons, a range returned in `effectiveRange` is not necessarily the maximal range. If you need the maximum range, you should use [`CFAttributedStringGetAttributeAndLongestEffectiveRange(_:_:_:_:_:)`](/documentation/CoreFoundation/CFAttributedStringGetAttributeAndLongestEffectiveRange(_:_:_:_:_:)). --- 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)