Support Full Keyboard Access in your iOS app

// Accessibility custom actions

let addAction = UIAccessibilityCustomAction(
    name: gameLocString("add"), image: UIImage(systemName: "plus.square")) { _ in
            self.addCard()
            return true
        }
        
let pinAction = UIAccessibilityCustomAction(
    name: gameLocString("pin"), image: UIImage(systemName: "pin.fill")) { _ in
            self.pinCard()
            return true
        }
        
cardView.accessibilityCustomActions = [addAction, pinAction]

// Keyboard shortcuts

// In AppDelegate.swift
override func buildMenu(with builder: UIMenuBuilder) {
    super.buildMenu(with: builder)
    guard builder.system == .main else {
        return
    }
        
    let pinCommand = UIKeyCommand(title: gameLocString("pin"), image: UIImage(systemName:
        "pin.fill"), action:#selector(GameViewController.pinFocusedCard), input: "P",
        discoverabilityTitle:gameLocString("pin.card"))      
    let addCommand = UIKeyCommand(title: gameLocString("add"), image: UIImage(systemName: 
        "plus.square"), action: #selector(GameViewController.addFocusedCard), input: "A",
        discoverabilityTitle: gameLocString("add.card"))
    let identifier = UIMenu.Identifier("gameplay_menu")
    let menu = UIMenu.init(title: gameLocString("gameplay"), image:  UIImage(systemName
        "rectangle.grid.3x2"), identifier: identifier, children: [addCommand, pinCommand]);
        
    builder.insertSibling(menu, afterMenu: .view)
}

// Keyboard shortcuts

// In GameViewController.swift
override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    if action == #selector(addFocusedCard) || action == #selector(pinFocusedCard) {
        return self.focusedCard != .none
    }
    return super.canPerformAction(action, withSender: sender)
}

itemView.isAccessibilityElement = true
itemView.accessibilityLabel = gameLocString(for: item)

itemView.accessibilityRespondsToUserInteraction = false

self.accessibilityUserInputLabels = [
    gameLocString("settings"),
    gameLocString("prefs"),
    gameLocString("preferences"),
    gameLocString("gear")];

// Accessibility path

let rect = circleLevelButton.convert(levelButton.bounds, to: nil)

circleLevelButton.accessibilityPath = UIBezierPath(ovalIn: rect)


// If your button is in a scroll view, it’s generally better to
// override accessibilityPath and/or accessibilityFrame
extension CircleButton {
    open override var accessibilityPath: UIBezierPath? {
        get {
            let rect = self.convert(self.bounds, to: nil)
            return UIBezierPath(ovalIn: rect)
        }
        set {
            // no-op
        }
    }
}