axiom-textkit-ref
TextKit 2 Reference
Complete reference for TextKit 2 covering architecture, migration from TextKit 1, Writing Tools integration, and SwiftUI TextEditor with AttributedString through iOS 26.
Architecture
TextKit 2 uses MVC pattern with new classes optimized for correctness, safety, and performance.
Model Layer
NSTextContentManager (abstract)
- Generates NSTextElement objects from backing store
- Tracks element ranges within document
- Default implementation: NSTextContentStorage
NSTextContentStorage
- Uses NSTextStorage as backing store
- Automatically divides content into NSTextParagraph elements
- Generates updated elements when text changes
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