If one offline device increments a counter (starting at 0) value by 5 and a second offline device decrements the counter by 2, what can I do so that the final counter value is 3 (once the devices come back online)?
I have read about operational transformations for conflict resolution. Is there any example code I can look at that implements it?
BP_Dev
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
The default font seems to be .AppleSystemUIFont based on UIFont.preferredFont(forTextStyle: .body).familyName. How can it be selected in a UIFontPickerViewController so that users can revert back to the original default font?
import SwiftUI
class FontPickerViewController: UIViewController, UIFontPickerViewControllerDelegate {
var isPickerPresented: Binding<Bool>?
var onFontPick: ((UIFontDescriptor) -> Void)?
override func loadView() {
super.loadView()
let button = UIButton(type: .system)
button.titleLabel?.font = UIFont.preferredFont(forTextStyle: .body)
button.setTitle("Choose font", for: .normal)
button.addTarget(self, action: #selector(showFontPicker), for: .touchUpInside)
button.sizeToFit()
button.backgroundColor = .clear
view = button
}
func fontPickerViewControllerDidPickFont(_ viewController: UIFontPickerViewController) {
dismiss(animated: true)
isPickerPresented?.wrappedValue = false
guard let fontDescriptor = viewController.selectedFontDescriptor else { return }
onFontPick?(fontDescriptor)
}
func fontPickerViewControllerDidCancel(_ viewController: UIFontPickerViewController) {
dismiss(animated: true)
isPickerPresented?.wrappedValue = false
}
@objc func showFontPicker() {
let configuration = UIFontPickerViewController.Configuration()
configuration.includeFaces = true
configuration.displayUsingSystemFont = false
let fontPicker = UIFontPickerViewController(configuration: configuration)
fontPicker.delegate = self
present(fontPicker, animated: true)
isPickerPresented?.wrappedValue = true
}
}
struct FontPickerViewControllerRepresentable: UIViewControllerRepresentable {
@Binding var isPickerPresented: Bool
var onFontPick: (UIFontDescriptor) -> Void
public func makeCoordinator() -> Coordinator {
return Coordinator(self, onFontPick: self.onFontPick)
}
public class Coordinator {
var parent: FontPickerViewControllerRepresentable
let picker = FontPickerViewController()
init(_ parent: FontPickerViewControllerRepresentable, onFontPick: @escaping (UIFontDescriptor) -> Void) {
self.parent = parent
picker.onFontPick = onFontPick
picker.isPickerPresented = parent._isPickerPresented
}
}
func makeUIViewController(context: Context) -> FontPickerViewController {
context.coordinator.picker
}
func updateUIViewController(_ uiViewController: FontPickerViewController, context: Context) {
if isPickerPresented {
context.coordinator.picker.showFontPicker()
} else {
}
}
@available(iOS 16.0, *)
func sizeThatFits(_ proposal: ProposedViewSize, uiViewController: FontPickerViewController, context: Context) -> CGSize? {
uiViewController.view.intrinsicContentSize
}
}
struct FontPicker: View {
@State var isPickerPresented = false
@State var selectedFont: UIFont?
var font: Font? {
if let selectedFont {
return Font(selectedFont)
}
return nil
}
var body: some View {
Button {
isPickerPresented = true
} label: {
HStack {
FontPickerViewControllerRepresentable(isPickerPresented: $isPickerPresented) { fontDescriptor in
let size = UIFont.preferredFont(forTextStyle: .body).pointSize
let font = UIFont(descriptor: fontDescriptor, size: size)
selectedFont = font
}
Spacer()
Text(selectedFont?.familyName ?? "Not Selected")
.font(font)
.foregroundColor(.secondary)
}
}
.onAppear {
print(UIFont.preferredFont(forTextStyle: .body))
}
}
}
}
struct Test3_Previews: PreviewProvider {
static var previews: some View {
Form {
FontPicker()
let defaultFont = UIFont.preferredFont(forTextStyle: .body)
Text(defaultFont.familyName)
Text(defaultFont.fontName)
}
}
}
If I create a swift package with 1000 strings in the Localizable.strings file for English, but I only end up using 10 of the strings in my app, will the other 990 strings be optimized away?
I am pretty sure that Localizable.strings files for languages not supported by the app are excluded, but I wanted to confirm whether Xcode is capable of detecting unused strings.
Does the Reminders app use Core Data with CloudKit behind the scenes? I would like to know what approach is used to allow for re-ordering items and how conflicts are handled when move operations are done from multiple offline devices.
I have a question regarding the "webcredentials" field in the "apple-app-site-association" file.
If there are multiple apps listed in webcredentials, do the credentials for one app need to work for the other apps?
I created an app without a web version and I am using the associated domain "webcredentials:website.com" to enable password autofill. I am wondering if I will be able to use the same associated domain for other apps in the future even if the credentials aren't shared between apps.
(I tried using a subpath "webcredentials:website.com/app1", but the subpath isn't used when looking at Settings -> Passwords)
Thank you,