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WWDC21 · 27 min · Essentials / SwiftUI & UI Frameworks

What’s new in Mac Catalyst

Discover the latest updates to Mac Catalyst and find out how you can make your app feel even more at home on macOS. Learn about a variety of new and enhanced UIKit APIs that let you customize your Mac Catalyst app to take advantage of behaviors unique to macOS. To get the most out of this session, we recommend a basic familiarity with Mac Catalyst. Check out “Introducing iPad Apps for Mac” from WWDC19 to acquaint yourself. For more on refining your Mac Catalyst app, watch “Optimize the interface of your Mac Catalyst app” from WWDC20.

Watch at developer.apple.com ↗

Transcript all transcripts

Code shown on screen · 22 snippets

Push Button swift · at 2:26 ↗ 
let button = UIButton(type: .system)
Toggle Button swift · at 2:29 ↗ 
let button = UIButton(type: .system)
button.changesSelectionAsPrimaryAction = true
Pull-down Menu swift · at 2:40 ↗ 
let button = UIButton(type: .system)
button.menu = UIMenu()
button.showsMenuAsPrimaryAction = true
Pop-up Button swift · at 2:48 ↗ 
let button = UIButton(type: .system)
button.menu = UIMenu()
button.showsMenuAsPrimaryAction = true
button.changesSelectionAsPrimaryAction = true
UIToolTipInteraction swift · at 3:50 ↗ 
let toolTipInteraction = UIToolTipInteraction(defaultToolTip: string)
view.addInteraction(tooltipInteraction)
UIControl ToopTip swift · at 4:06 ↗ 
control.toolTip = "Enable updates"
ToolTips: UILabel swift · at 4:44 ↗ 
label.showsExpansionTextWhenTruncated = true
Printing APIs xml · at 4:52 ↗ 
<key>UIApplicationSupportsPrintCommand</key>
</true>
Print Support swift · at 5:44 ↗ 
func printContent(_ sender: Any?) {
    let printInteractionController = UIPrintInteractionController.shared
    ...
}
Window Subtitle swift · at 6:01 ↗ 
scene.subtitle = "My subtitle"
Behavioral Style swift · at 7:34 ↗ 
let button = UIButton(configuration: config)
button.preferredBehavioralStyle = .pad
Window Tab Opt-Out xml · at 7:43 ↗ 
<key>UIApplicationSceneManifest</key>
	<dict>
		<key>UIApplicationSupportsMultipleScenes</key>
		<true/>
		<key>UIApplicationSupportsTabbedSceneCollection</key>
		<false/>
	</dict>
UIPointerShape swift · at 8:23 ↗ 
UIPointerShape.beam(preferredLength:0 axis: .horizontal)
UIPointerShape.beam(preferredLength:0 axis: .vertical)
Hidden Cursor swift · at 8:33 ↗ 
UIPointerStyle.hidden
Scene subtitles swift · at 13:25 ↗ 
let subtitle: String = "..."
let scene: UIScene = ...
scene.subtitle = subtitle
ToolTips swift · at 14:54 ↗ 
// ToolTip Interaction
let imageView: UIImageView = UIImageView(frame: .zero)
let interaction = UIToolTipInteraction(defaultToolTip: "...")
imageView.addInteraction(interaction)

// ToolTips - Label Expansion Text
let label: UILabel = UILabel()
label.text = "..."
label.showsExpansionTextWhenTruncated = true

// ToolTips — On UIControls
let switchControl = UISwitch()
switchControl.toolTip = "..."
Primary button swift · at 17:49 ↗ 
let submitButton = UIButton(type: .system)
submitButton.role = .primary
submitButton.setTitle("Submit", for: .normal)
Toggle button with menu swift · at 18:06 ↗ 
// Toggle button with menu
let toggleButton = UIButton(configuration: .filled(), primaryAction: nil)
toggleButton.configuration?.title = "Points Multiplier"
toggleButton.changesSelectionAsPrimaryAction = true
toggleButton.menu = ...

// Elsewhere...
toggleButton.configuration?.baseBackgroundColor = .systemRed
Plain, destructive button swift · at 19:09 ↗ 
let resetButton = UIButton(configuration: .plain(), primaryAction: nil)
resetButton.configuration?.title = "Reset"
resetButton.role = .destructive
resetButton.tintColor = .systemRed
Pop-up button swift · at 19:36 ↗ 
let popup = UIButton(type: .system)
popup.changesSelectionAsPrimaryAction = true
popup.showsMenuAsPrimaryAction = true
popup.menu = ...
iPad behavioral style toggle swift · at 21:01 ↗ 
let button = UIButton(configuration: .filled(), primaryAction: nil)
button.configuration?.image = UIImage(systemName: "leaf")
button.preferredBehavioralStyle = .pad
button.configuration?.preferredSymbolConfigurationForImage =   
    UIImage.SymbolConfiguration(pointSize: 60)
button.changesSelectionAsPrimaryAction = true
button.configurationUpdateHandler = colorUpdateHandler
Printing swift · at 24:21 ↗ 
override func printContent(_: Any?) {
    ...
}

override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    if action == #selector(self.printContent(_:)) {
        ...
    } else {
        return super.canPerformAction(action, withSender: sender)
    }
}

override func target(forAction action: Selector, withSender sender: Any?) -> Any? {
    switch action {
    case #selector(UIResponder.printContent(_:)):
        ...
    default:
        return super.target(forAction: action, withSender: sender)
    }
}

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