Adopt desktop-class editing interactions

2:42 - Adding items into text edit menus

func textView(
    _ textView: UITextView, 
    editMenuForTextIn range: NSRange, 
    suggestedActions: [UIMenuElement]) -> UIMenu?

4:03 - Adding actions into a text view's menu

func textView(
    _ textView: UITextView,
    editMenuForTextIn range: NSRange,
    suggestedActions: [UIMenuElement]
) -> UIMenu? {
    var additionalActions: [UIMenuElement] = []
    if range.length > 0 {
        let highlightAction = UIAction(title: "Highlight", ...)
        additionalActions.append(highlightAction)
    }
    let insertPhotoAction = UIAction(title: "Insert Photo", ...)
    additionalActions.append(insertPhotoAction)
    return UIMenu(children: suggestedActions + additionalActions)
}

5:24 - Presenting an edit menu with a custom gesture

let editMenuInteraction = UIEditMenuInteraction(delegate: self)
view.addInteraction(editMenuInteraction)

let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(didTap(_:)))
tapRecognizer.allowedTouchTypes = [UITouch.TouchType.direct.rawValue as NSNumber]
view.addGestureRecognizer(tapRecognizer)

@objc func didTap(_ recognizer: UITapGestureRecognizer) {
    let location = recognizer.location(in: self.view)
    if self.hasSelectedObjectView(at: location) {
        let configuration = UIEditMenuConfiguration(identifier: nil, sourcePoint: location)
        editMenuInteraction.presentEditMenu(with: configuration)
    }
}

7:13 - Implementing UIEditMenuInteractionDelegate

func editMenuInteraction(
    _ interaction: UIEditMenuInteraction,
    targetRectFor configuration: UIEditMenuConfiguration
) -> CGRect {
    guard let selectedView = objectView(at: configuration.sourcePoint) else { return .null }
    return selectedView.frame
}

func editMenuInteraction(
    _ interaction: UIEditMenuInteraction,
    menuFor configuration: UIEditMenuConfiguration,
    suggestedActions: [UIMenuElement]
) -> UIMenu? {
    let duplicateAction = UIAction(title: "Duplicate") { ... }
    return UIMenu(children: suggestedActions + [duplicateAction])
}

10:34 - Using the "keeps menu presented" attribute

UIAction(title: "Increase",
         image: UIImage(systemName: "increase.indent"),
         attributes: .keepsMenuPresented) { ... }

UIAction(title: "Decrease",
         image: UIImage(systemName: "decrease.indent"),
         attributes: .keepsMenuPresented) { ... }

12:46 - Find with system views

open var findInteraction: UIFindInteraction? { get }
textView.isFindInteractionEnabled = true

17:22 - Installing a UIFindInteraction on a custom view

let customDocument = MyDocument(string: "")
lazy var customView = MyTextView(document: customDocument)

lazy var findInteraction = UIFindInteraction(sessionDelegate: self)

override var canBecomeFirstResponder: Bool { true }

override func viewDidLoad() {
    customView.addInteraction(findInteraction)
}

func findInteraction(_ interaction: UIFindInteraction, sessionFor view: UIView) -> UIFindSession? {
    return UITextSearchingFindSession(searchableObject: customDocument)
}