# TextKit string attribute keys UIKit-specific keys you use to apply attributes to ranges of characters in an attributed string. ## Overview UIKit defines these attribute keys you use to specify attribute values in and . ## Topics ### Getting rendering attribute keys [`extern NSAttributedStringKey const NSBackgroundColorAttributeName;`](/documentation/UIKit/NSBackgroundColorAttributeName) The color of the background behind the text. [`extern NSAttributedStringKey const NSBaselineOffsetAttributeName;`](/documentation/UIKit/NSBaselineOffsetAttributeName) The vertical offset for the position of the text. [`extern NSAttributedStringKey const NSFontAttributeName;`](/documentation/UIKit/NSFontAttributeName) The font of the text. [`extern NSAttributedStringKey const NSForegroundColorAttributeName;`](/documentation/UIKit/NSForegroundColorAttributeName) The color of the text. [`extern NSAttributedStringKey const NSKernAttributeName;`](/documentation/UIKit/NSKernAttributeName) The kerning of the text. [`extern NSAttributedStringKey const NSLigatureAttributeName;`](/documentation/UIKit/NSLigatureAttributeName) The ligature of the text. [`extern NSAttributedStringKey const NSParagraphStyleAttributeName;`](/documentation/UIKit/NSParagraphStyleAttributeName) The paragraph style of the text. [`extern NSAttributedStringKey const NSStrikethroughColorAttributeName;`](/documentation/UIKit/NSStrikethroughColorAttributeName) The color of the strikethrough. [`extern NSAttributedStringKey const NSStrikethroughStyleAttributeName;`](/documentation/UIKit/NSStrikethroughStyleAttributeName) The strikethrough style of the text. [`extern NSAttributedStringKey const NSStrokeColorAttributeName;`](/documentation/UIKit/NSStrokeColorAttributeName) The color of the stroke. [`extern NSAttributedStringKey const NSStrokeWidthAttributeName;`](/documentation/UIKit/NSStrokeWidthAttributeName) The width of the stroke. [`extern NSAttributedStringKey const NSTrackingAttributeName;`](/documentation/UIKit/NSTrackingAttributeName) The amount to modify the default tracking. [`extern NSAttributedStringKey const NSUnderlineColorAttributeName;`](/documentation/UIKit/NSUnderlineColorAttributeName) The color of the underline. [`extern NSAttributedStringKey const NSUnderlineStyleAttributeName;`](/documentation/UIKit/NSUnderlineStyleAttributeName) The underline style of the text. [`extern NSAttributedStringKey const NSWritingDirectionAttributeName;`](/documentation/UIKit/NSWritingDirectionAttributeName) The writing direction of the text. ### Getting text attribute keys [`extern NSAttributedStringKey const NSLinkAttributeName;`](/documentation/UIKit/NSLinkAttributeName) The link for the text. [`extern NSAttributedStringKey const NSShadowAttributeName;`](/documentation/UIKit/NSShadowAttributeName) The shadow of the text. [`extern NSAttributedStringKey const NSTextEffectAttributeName;`](/documentation/UIKit/NSTextEffectAttributeName) An attribute that applies a text effect to the text. [`extern NSAttributedStringKey const NSTextHighlightColorSchemeAttributeName;`](/documentation/UIKit/NSTextHighlightColorSchemeAttributeName) The custom highlight color to apply to the text. [`extern NSAttributedStringKey const NSTextHighlightStyleAttributeName;`](/documentation/UIKit/NSTextHighlightStyleAttributeName) An attribute that adds a highlight color to the text to emphasize it. [`extern NSAttributedStringKey const UITextItemTagAttributeName;`](/documentation/UIKit/UITextItemTagAttributeName) The name of a custom tag associated with a text item. [`extern NSAttributedStringKey const NSWritingToolsExclusionAttributeName;`](/documentation/UIKit/NSWritingToolsExclusionAttributeName) ### Getting attachment attribute keys [`extern NSAttributedStringKey const NSAdaptiveImageGlyphAttributeName;`](/documentation/UIKit/NSAdaptiveImageGlyphAttributeName) The adaptive image glyph for the text. [`extern NSAttributedStringKey const NSAttachmentAttributeName;`](/documentation/UIKit/NSAttachmentAttributeName) The attachment for the text. ### Getting accessibility attribute keys [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributeAnnouncementPriority;`](/documentation/UIKit/UIAccessibilitySpeechAttributeAnnouncementPriority) [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributeIPANotation;`](/documentation/UIKit/UIAccessibilitySpeechAttributeIPANotation) A key that indicates the pronunciation of a specific word or phrase, such as a proper name. [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributeLanguage;`](/documentation/UIKit/UIAccessibilitySpeechAttributeLanguage) A key that indicates the language to use when speaking a string. [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributePitch;`](/documentation/UIKit/UIAccessibilitySpeechAttributePitch) A key that indicates the pitch to apply to spoken content. [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributePunctuation;`](/documentation/UIKit/UIAccessibilitySpeechAttributePunctuation) A key that indicates whether to speak punctuation. [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributeQueueAnnouncement;`](/documentation/UIKit/UIAccessibilitySpeechAttributeQueueAnnouncement) A key that indicates whether to queue an announcement behind existing speech or to interrupt it. [`extern NSAttributedStringKey const UIAccessibilitySpeechAttributeSpellOut;`](/documentation/UIKit/UIAccessibilitySpeechAttributeSpellOut) [`extern NSAttributedStringKey const UIAccessibilityTextAttributeCustom;`](/documentation/UIKit/UIAccessibilityTextAttributeCustom) A key for specifying custom attributes to apply to the text. [`extern NSAttributedStringKey const UIAccessibilityTextAttributeHeadingLevel;`](/documentation/UIKit/UIAccessibilityTextAttributeHeadingLevel) A key for specifying the heading level of the text. [`extern NSAttributedStringKey const UIAccessibilityTextAttributeContext;`](/documentation/UIKit/UIAccessibilityTextAttributeContext) ### Deprecated keys [`extern NSAttributedStringKey const NSExpansionAttributeName;`](/documentation/UIKit/NSExpansionAttributeName) The expansion factor of the text. [`extern NSAttributedStringKey const NSObliquenessAttributeName;`](/documentation/UIKit/NSObliquenessAttributeName) The obliqueness of the text. [`extern NSAttributedStringKey const NSVerticalGlyphFormAttributeName;`](/documentation/UIKit/NSVerticalGlyphFormAttributeName) The vertical glyph form of the text. --- 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)