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WWDC22 · 24 min · Essentials / SwiftUI & UI Frameworks

What’s new in TextKit and text views

Discover the latest updates to TextKit and text views in UI frameworks. Explore layout refinements and API enhancements, learn how you can maintain compatibility across multiple OS versions, and find out how to modernize your app with TextKit 2. To get the most out of this session, watch “Meet TextKit 2” from WWDC21.

Watch at developer.apple.com ↗

Transcript all transcripts

Code shown on screen · 5 snippets

Check for NSTextLayoutManager first swift · at 13:21 ↗ 
if let textLayoutManager = textView.textLayoutManager {
    // TextKit 2 code goes here
}
else {
    let layoutManager = textView.layoutManager    
    // TextKit 1 code goes here
}
Counting number of lines of wrapped text in a text view with TextKit 2 swift · at 17:41 ↗ 
// Example: Updating glyph-based code 

var numberOfLines = 0
let textLayoutManager = textView.textLayoutManager

textLayoutManager.enumerateTextLayoutFragments(from:
                                               textLayoutManager.documentRange.location,
                                               options: [.ensuresLayout]) { layoutFragment in
        numberOfLines += layoutFragment.textLineFragments.count
}
Convert NSRange to NSTextRange swift · at 21:10 ↗ 
let textContentManager = textLayoutManager.textContentManager

let startLocation = textContentManager.location(textContentManager.documentRange.location, 
                                                offsetBy: nsRange.location)!

let endLocation = textContentManager.location(startLocation, 
                                              offsetBy: nsRange.length)

let nsTextRange = NSTextRange(location: startLocation, end: endLocation)
Convert NSTextRange to NSRange swift · at 21:40 ↗ 
let textContentManager = textLayoutManager.textContentManager

let location = textContentManager.offset(from: textContentManager.documentRange.location,
                                         to: nsTextRange!.location)

let length = textContentManager.offset(from: nsTextRange!.location,
                                       to: nsTextRange!.endLocation)

let nsRange = NSRange(location: location, length: length)
Convert UITextRange to NSTextRange swift · at 22:02 ↗ 
let offset = textView.offset(from: textview.beginningOfDocument, to: uiTextRange.start)

let startLocation = textContentManager.location(textContentManager.documentRange.location, 
                                                offsetBy: offset)!

let nsTextRange = NSTextRange(location: startLocation)