235-Taking iPad Apps for Mac to the Next Level

Refinements for Mac

Menu Bar

• UIKeyCommand
• UICommand
• UIMenu
• UIMenuBuilder

Context Menus

• UIContextMenuInteraction
• UIAction
• UICommad

Sidebars

• UISplitViewController
  • minimumPrimaryColumnWidth
  • maximumPrimaryColumnWidth
  • primaryBackgroundStyle
• UITableView Style
  • UITableViewStyle.grouped
  • UITableviewStyle.insetGrouped

Hover

UIHoverGestureRecognizer

Mac Toolbars(AppKit)

• NSToolbar
• UIWindowScene.titlebar.toolbar

Touch Bar(AppKit)

• NSTouchBar
• UIResponder.touchBar
• UIViewController.childViewControllerForTouchBar
• UIViewController.setNeedsTouchBarUpdate

Demo

Tool Bar

Menu Bar

override func buildMenu(with builder: UIMenuBuilder) {
  guard builder.system == .main else { return }
        
  let logoutCommand = UIKeyCommand(title: "Sign Out",
                                   action: #selector(AppDelegate.logout),
                                   input: "L",
                                   modifierFlags: [.command, .alternate])
  let logoutMenu = UIMenu(title: "",
                          identifier: UIMenu.Identifier("com.xxx.logout"),
                          options: .displayInline,
                          children: [logoutCommand])
        
  builder.insertSibling(logoutMenu, beforeMenu: UIMenu.Identifier.quit)
  builder.remove(menu: UIMenu.Identifier.format)   
}
    
override func validate(_ command: UICommand) {
  if command.title == "Sign Out" {
    command.attributes = isLogined ? [] : [.disabled]
  }
}

Adding Menus and Shortcuts to the Menu Bar and User Interface (opens new window)

Application Lifecycle

• On macOS, keep all mac catalyst apps foreground and active almost all the time.

• Only enter the foreground inactive and background states during app termination and background launches.

• When user initiate app termination(⌘Q), the state change notifications will take you from foreground active through foreground inactive to the background.

• In background, the app will immediately appear as no longer running, but behind the scenes, we give background tasks a chance to finish.

• If the user tries to launch the app while it is still backgrounded, we simply return your app to the foreground active state.

• iOS has quite a few APIs that allow you to opt into some form of background launch for your app.

  • Background URL sessions
  • Silent push notifications
  • Notification actions
  • BackgroundTasks

• Mac catalyst apps are rarely suspended on macOS. It is always terminated immediately even if no memory pressure exists.

Distribution

Notarized App

Signed by Developer ID