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WWDC24 · 21 min · App Services / SwiftUI & UI Frameworks

What’s new in UIKit

Explore everything new in UIKit, including tab and document launch experiences, transitions, and text and input changes. We’ll also discuss better-than-ever interoperability between UIKit and SwiftUI animations and gestures, as well as general improvements throughout UIKit.

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Code shown on screen · 8 snippets

Using SwiftUI to animate UIViews with gestures swift · at 0:01 ↗ 
switch gesture.state {
case .changed:
    UIView.animate(.interactiveSpring) {
        bead.center = gesture.translation
    }

case .ended:
    UIView.animate(.spring) {
        bead.center = endOfBracelet
    }
}
Setting failure requirements between gestures swift · at 0:02 ↗ 
// Inner SwiftUI double tap gesture

Circle()
    .gesture(doubleTap, name: "SwiftUIDoubleTap")


// Outer UIKit single tap gesture

func gestureRecognizer(
    _ gestureRecognizer: UIGestureRecognizer, 
    shouldRequireFailureOf other: UIGestureRecognizer
) -> Bool {
    other.name == "SwiftUIDoubleTap"
}
Responding to horizontalSizeClass trait swift · at 0:03 ↗ 
class MyView: UIView {
    override func layoutSubviews() {
        super.layoutSubviews()
        
        if traitCollection.horizontalSizeClass == .compact {
            // apply compact layout
        } else {
            // apply regular layout
        }
    }
}
Using the new automatic content and background configurations swift · at 0:04 ↗ 
func configurations(for location: FileLocation) ->
    (UIListContentConfiguration, UIBackgroundConfiguration) {

    var contentConfiguration = UIListContentConfiguration.cell()
    let backgroundConfiguration = UIBackgroundConfiguration.listCell()

    contentConfiguration.text = location.title
    contentConfiguration.image = location.thumbnailImage

    return (contentConfiguration, backgroundConfiguration)
}
Using UIUpdateLink swift · at 0:05 ↗ 
let updateLink = UIUpdateLink(
    view: view,
    actionTarget: self,
    selector: #selector(update)
)
updateLink.requiresContinuousUpdates = true
updateLink.isEnabled = true

@objc func update(updateLink: UIUpdateLink,
                  updateInfo: UIUpdateInfo) {
    view.center.y = sin(updateInfo.modelTime)
        * 100 + view.bounds.midY
}
An example of providing UICanvasFeedbackGenerator with additional context swift · at 0:06 ↗ 
@ViewLoading var feedbackGenerator: UICanvasFeedbackGenerator

override func viewDidLoad() {
    super.viewDidLoad()
    feedbackGenerator = UICanvasFeedbackGenerator(view: view)
}

func dragAligned(_ sender: UIPanGestureRecognizer) {
    feedbackGenerator.alignmentOccurred(at: sender.location(in: view))
}
Using new attributes for highlight swift · at 0:07 ↗ 
var attributes = [NSAttributedString.Key: Any]()

// Highlight style
attributes[.textHighlightStyle] = 
NSAttributedString.TextHighlightStyle.default

// Highlight color scheme
attributes[.textHighlightColorScheme] =
NSAttributedString.TextHighlightColorScheme.default
Customizing formatting panel swift · at 0:08 ↗ 
textView.textFormattingConfiguration = .init(groups: [
    .group([
        .component(.fontAttributes, .mini),
        .component(.fontPicker, .regular),
        .component(.textColor, .mini)
    ]),
    .group([
        .component(.fontPointSize, .mini),
        .component(.listStyles, .regular),
        .component(.highlight, .mini)
    ])
])

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