Hi all. I have a timer working in a view on the Watch app, but I just can't get them working in widgets. Can you use timers in Home Screen & Lock Screen widgets? I can't find anything that says you can't...
Take this code:
struct ScratchPadView: View {
@State var backgroundGradient: LinearGradient = gradientOne
let gradientTimer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
var body: some View {
let date: Date = getDateFromString("20220828 10:00")
ZStack {
backgroundGradient
.onReceive(gradientTimer) { _ in
self.backgroundGradient = (date >= Date()) ? gradientOne : gradientTwo
}
}
}
}
All this is supposed to do is change the gradient in the background from gradientOne to gradientTwo when the current date is after the date supplied. Doesn't work. The date can come and go and the gradient never changes from what it was initially set up to use: gradientOne.
Like I say, this works fine in a Watch app View, but just doesn't work in a widget.
Is the only alternative to provide a timeline entry for that date so the widget refreshes and notices that the date has now passed?
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Let's say you have a Text.init(Date().advanced(by: 5), style: .timer). It's set to countdown to a date 5 seconds from now (just for simplicity's sake).
It goes like this:
Countdown starts, and shows 0:05.
After 1 second it shows 0:04.
After 2 seconds it shows 0:03.
After 3 seconds it shows 0:02.
After 4 seconds it shows 0:01.
After 5 seconds it shows 0:00. Countdown done.
After 6 seconds it should show 0:01, right? It doesn't; it shows 0:00.
After 7 seconds it shows 0:01, even though only 6 seconds have passed.
It's almost as though the timer is being restarted once it hits zero, but that isn't right. There aren't "two seconds at 0:00" (that's not how time works...).
Anyone seeing this, or is just me?
I have a content blocker working fine, but have noticed some websites are putting a class in the main body tag, and removing it when the user taps to accept/decline cookies.
For example:
<body class="homepage ContentPage language-en modal-open no-overflow">
...
<div id="cookieNotice">...</div>
My content blocker can remove the cookieNotice div completely using: div[id="cookieNotice"], but the page doesn't scroll because the body tag includes modal-open no-overflow.
Can a content blocker remove values/classes from a tag? If so, what would the XPath look like? Thanks.
I have a countdown/up timer in a widget, and I want to format the timer to something more readable than the default that Text.init(myDate, style: .timer) provides.
The default outputs a timer for just the hours in the date range. So, for example, a timer of 1 week, 5 hours, 12 minutes and 45 seconds will appear as 173:12:45 (which is 7 * 24 + 5 = 173) - not very user-friendly.
An ideal output would be 1 week 05:12:45. Is there any way of doing that?
I've tried a number of different ways using TimeInterval, DateInterval, and modding (%) values - like modding the hours count by 168 to get a number of weeks - but they're pretty much useless when there are never a set number of days or weeks in a year due to leap years.
It would be great if you would provide actual code examples rather than saying to use a certain API, as I could very easily go down a rabbit hole like I have with TimeInterval and DateInterval. Thanks!
I have an iOS app that's written in Objective-C, uses Core Data, and has a number of SwiftUI targets (Widgets, Watch app). I'd like to convert the main app to SwiftUI and keep access to the data in the Core Data stack, but move to SwiftData immediately. Since I'm doing a lot of rewriting, it makes sense to leap ahead rather than have to rewrite it in a year or two. Effort isn't an issue; I'm a tenacious SOB ;)
But I have no idea how to do this, and can't find any examples on the net of this particular scenario. All I can find is how to start using SwiftData instead of Core Data in an app that's already written in Swift.
So, how do I go about the migration without losing data?
I guess I'll need to add a new Swift/SwiftUI target for the main app, but then how do I migrate the Core Data store over? In ObjC there's a lot of messing with stacks and the actual location of the model in the filesystem, but I doubt this is necessary in the new way of doing things?
Any help would be appreciated. Thanks!
My app lets you create a list of items and pick one as the main item. For Home Screen widgets there are two bits of text you can use in the panel that appears when you want to add the widget:
public var body: some WidgetConfiguration {
IntentConfiguration(kind: "myWidgetKind", intent: DynamicSelectionIntent.self, provider: Provider()) { entry in
MyWidgetEntryView(entry: entry)
}
.configurationDisplayName("Title")
.description("Description")
So, for a Home Screen widget the panel displays the title and description, and the preview shows the main item. Once you've added the widget you can edit it and pick a different item, so the title is "Display an Item" and the description is quite general, telling you what the widget can display.
The title and description are also displayed in the panel when you want to add a Lock Screen widget:
For the inline Lock Screen widget, you see "Title".
For rectangular and circular widgets below the clock, you see the usual Home Screen panel, so both "Title" and "Description".
There's no way of editing the item that sits behind the Lock Screen widget once you've added it, so the general text needs to be more specific and refer to the main item.
How do you give different title and description text when you're adding a Lock Screen widget?
In the first image you can see my app at the top of the list, and Apple's Weather app widget. Both are showing the SF Symbol rendered correctly.
In the second image the inline widget chosen is Apple's Weather app. The SF Symbol is correctly shown.
In the third image my app's inline widget has been chosen, but the image is not rendered correctly; it's just a block.
Is there something I have to do to my image to have it rendered correctly?
I have an app with Home Screen widgets, and new Lock Screen widgets, and I'm trying to get my complications to work on the Watch.
The widgets are running off dynamic intents, taking a list of items from user defaults and providing that list for the user to choose when they add a Home Screen or Lock Screen widget. This works fine.
In the "Complications and widgets: Reloaded" video from WWDC2022 at about 7:00 the guy tells you to duplicate the widget extension, rename it, and set it to run on watchOS. I ended up with these targets:
Main App (embeds Widget, Intents Handler and Watch App)
Widget
Intents Handler
Watch App (embeds Complications)
Complications (new, copy of Widget)
At about 8:30 he adds the supported families for the Watch to his EmojiRangersWidget WidgetConfiguration, so it looks like the code for the accessory widgets is used for both Lock Screen widgets and complications?
Should I be putting all my complications views in the Widget target, something like this?
@main
struct WidgetEntry: Widget
{
public var body: some WidgetConfiguration {
IntentConfiguration(kind: kWidgetKind,
intent: DynamicItemSelectionIntent.self,
provider: Provider()
) { entry in
WidgetEntryView(entry: entry)
}
.configurationDisplayName("abc")
.description("def")
#if os(watchOS)
.supportedFamilies([.accessoryCircular, .accessoryInline, .accessoryRectangular, .accessoryCorner])
#else
.supportedFamilies([.accessoryCircular, .accessoryInline, .accessoryRectangular, .systemSmall, .systemMedium])
#endif
}
}
struct WidgetEntryView: View
{
var entry: Provider.Entry
@Environment(\.widgetFamily) var family
@ViewBuilder
var body: some View {
#if os(watchOS)
switch family {
case .accessoryCircular, .accessoryCorner, .accessoryInline, .accessoryRectangular:
ComplicationView(item: entry.item)
@unknown default:
UnknownComplicationView(item: entry.item)
}
#else
switch family {
case .accessoryCircular, .accessoryInline, .accessoryRectangular:
LockScreenWidgetView(item: entry.item)
case .systemSmall:
SmallWidgetView(item: entry.item)
case .systemMedium, .systemLarge, .systemExtraLarge:
MediumWidgetView(item: entry.item)
@unknown default:
UnknownWidgetView(item: entry.item)
}
#endif
}
}
I've previously been told by an Apple engineer on these forums: "The complication code should be in the watch app target. That's where watchOS 7 and 8 will look for complications, and where watchOS 9 will look for old ClockKit complications for migration to their WidgetKit counterparts." I'm no longer supporting watchOS 7/8, but does this mean that watchOS 7/8 will look for old complications in there to migrate to the new stuff into the Widget target? I asked a couple of follow-up questions but they never got answered ¯\_(ツ)_/¯
Apple make this stuff so unnecessarily complex, even though their videos make it look so easy. How many times have we all paused their videos to see exactly what code they're writing and where they're putting it? There's practically zero help out there - these forums are full of questions and few answers. Xcode should have much better documentation and help to guide you through this. It takes so long to get anything done because there just isn't the information we need.
... all talking about customer care numbers.
Maybe Apple should make these Dev Forums just for signed-in Developers? If a Developer spams, they can be blocked. But if just anyone can register and post, they can spam, get banned, then start a new account.
Or, Apple should implement some way of blocking the spam before it gets posted.
I really don't understand what these spammers think they're getting out of doing this? Who is going to look through the forums and think, "Oh, a customer care number for something I've never heard of? I should phone that immediately!" Really does prove that spammers are dumb.
I recently raised this post explaining how I couldn't seem to get watchOS 9 complications to work, and I've figured out a partial fix.
The original post details the issues with complications - and some are still valid - but this fix applies to both my complications and Home Screen / Lock Screen widgets.
I was following the various WWDC 2020/2022 videos and the Emoji Rangers sample code, adding bits here and there, and assuming they were completely valid. Sadly, this bit of code in the widget's dynamic intents IntentTimelineProvider getTimeline really just banjaxed everything:
// Create entries for one day, 15 minutes apart
let currentDate = Date()
for minuteOffset in stride(from: 0, to: 60 * 60 * 24, by: 15) {
let entryDate = Calendar.current.date(byAdding: .minute, value: minuteOffset, to: currentDate)!
entries.append(EventEntry(date: entryDate, event: event))
}
If I remove that, and generate a different timeline with specific dates and times (for example: now, in 10 mins, in 2 hours, in a day, etc.) the complications appear correctly, as do Home Screen and Lock Screen widgets.
The outstanding issues with complications are:
The previews all use the same data, but getSnapshot() is supposed to return the data specific to that event from the configuration, i.e. if let theId = configuration.event?.identifier. "Christmas" is correct, but "Gallery Opening" is using Christmas's data.
Once I've selected the event I want to use in a complication the edit screen shows it as totally blank, not even a placeholder:
I hope this little fix works for you guys. And, if you know how to fix the above issues, let me know.
(iOS 16.1 beta 1, Xcode 14.1 beta 1)
I have a settings screen in my ObjC iOS app and in the SwiftUI Watch app.
When you change something in the Watch app's screen and click the Save button it sends a dictionary of the new values to the iOS app. The iOS app receives it and updates its settings in the defaults, and also updates the Settings screen in the iOS app if it's on-screen when you made the changes on the Watch. I post a notification to update the Settings screen, and this works fine.
I now need to handle it the other way round, i.e. you make changes in the iOS app, it sends a dictionary to the Watch, the Watch receives it and applies the settings, then updates the Watch app's Settings screen if it was open when the settings changed.
I added the setting values in the Watch app to my model data, and the settings do correctly update when they're changed by the iOS app. However, the controls within the Settings screen on the Watch don't update because they're tied to @State vars, not the modelData vars.
Here's some pseudocode to explain that:
var newMode: Int = modelData.mode // Get the initial value from the modelData
struct SettingsView: View {
@State private var mode = newMode
var body: some View {
Text("\(modelData.mode)") // This updates when settings are changed in the iOS app
Text("\(mode)") // This doesn't update
Text("\(newMode)") // This doesn't update
Picker("Mode", selection: $mode) {
Text("0")).tag(0)
Text("1")).tag(1)
Text("2")).tag(2)
}
.pickerStyle(.navigationLink)
.onChange(of: mode) { value in
updateMode(value)
}
...
}
func updateMode(_ value: Int) {
newMode = value
}
In the two Text() lines that don't update it's understandable because they aren't tied to anything external to the screen, but even if I add an extra .onChange like this it doesn't update the value in the UI:
.onChange(of: modelData.mode) { value in
mode = value
newMode = mode
}
The idea of the Settings screen is to allow the user to make changes, and either save their changes and apply them, or cancel and revert to the original settings.
I don't want to update the settings unless the user specifically presses the "Save" button, and I really don't want to remove the "Save" button and simply apply the changes each time a change is made as I'd be sending a dictionary of data to the iOS app each time - I have a stepper in there, which would send it every time the value changed, which could be tens of times.
So, the problem is that although the modelData.mode value is correctly changed by the receipt of new data from the iOS app, the Settings controls on the Watch do not update because they aren't tied to it. How do I get that to work? Is there a way of updating the newMode value and where it's displayed in the UI when the modelData changes?
This should be simple, but it's proving immensely difficult and annoying.
I have three targets in the project:
an iOS app written in Objective-C
a Watch App written in Swift/SwiftUI
a Widget Extension with my widgets and complications in, written in Swift/SwiftUI
I want to access the Core Data that's got all my app's data in it from the Widget Extension and Watch App. How do I do this? Every internet search result assumes all your targets are in Swift, and it's really not feasible for me to rewrite the entire app.
All three targets have the same App Group set up, and I can access UserDefaults in each target.
I have a CoreData.swift class in a shared folder, and it's a member of both the Watch App and Widget Extension targets. It has this in it:
lazy var persistentContainer: NSPersistentContainer = {
let storeURL = URL.storeURL(for: kAppGroup, databaseName: kCoreDataModel)
let storeDescription = NSPersistentStoreDescription(url: storeURL)
let container = NSPersistentContainer(name: kCoreDataModel)
container.persistentStoreDescriptions = [storeDescription]
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
fatalError("CoreData: Failed to initialise Managed Object Model from url: \(storeURL), with error: \(error), \(error.userInfo)")
}
})
return container
}()
and the storeURL extension is:
public extension URL {
static func storeURL(for appGroup: String, databaseName: String) -> URL {
guard let fileContainer = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup) else {
fatalError("CoreData: Shared file container could not be created.")
}
return fileContainer.appendingPathComponent("\(kCoreDataModel).sqlite")
}
}
To be clear, the main iOS app (in Objective-C) has created the Core Data model etc., and it all works fine. I just want to be able to access the data in that model from the other targets. (I only need read access.)
When I deploy to a device the stack looks like this:
NSURL *dataModelFolderURL = [[[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:kAppGroup] URLByAppendingPathComponent:kCoreDataFolder];
Is: /private/var/mobile/Containers/Shared/AppGroup/9F329A90-C897-4AA2-87DF-D98A9E85356A/data-model
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:kCoreDataModel withExtension:@"momd"];
Is: file:///private/var/containers/Bundle/Application/CA9E3697-C4C6-48CB-89EA-CC441A6F81AF/MyApp.app/TheDataModel.momd/
// Wait until we have the store, or fetches will sometimes return no data
[self performSelectorOnMainThread:@selector(getStore) withObject:nil waitUntilDone:YES];
storeURL = file:///private/var/mobile/Containers/Shared/AppGroup/9F329A90-C897-4AA2-87DF-D98A9E85356A/data-model/TheDataModel
I've tried getting the Swift targets to look in a bunch of different paths, but nothing works. When I try to get a count of objects in the Core Data I always get zero results.
The second of those outputs is from the bundle. I guess that's because the data model is held within the iOS app's structure? Does that make any difference? Should it be held somewhere else? If so, what should it be?
(Minor rant: There really should be an option in Xcode that says, "This core data is shared here, here and here, and all you need to do is type CoreData.getSomeData() and you're done", but no, we have to write boilerplate code for everything.)
Anyway... any help is appreciated.
I've had to rewrite my app to get widgets working properly, and I've got this project structure:
Main iOS app:
Bundle identifier = com.me.myapp
Contains:
Widget Extension:
Bundle identifier = com.me.myapp.widgets
Targets iOS 17
Provides widgets to iOS
Watch app:
Bundle identifier = com.me.myapp.watchapp
Contains:
Complications Extension (a Widget Extension):
Bundle identifier = com.me.myapp.watchapp.complications
Targets watchOS 10
Provides widgets to watchOS
On the Signing & Capabilities tab in Xcode 15, all four targets have:
Provisioning Profile: Xcode Managed Profile
Signing Certificate: Apple Development: My team
App Groups: all use the same one: group.com.me.myapp
I can build and deploy to a physical iPhone and Apple Watch, but the Watch app doesn't seem to be able to access the shared Core Data, which should be in the shared app group container.
When running the main iOS app, the store location is:
file:///private/var/mobile/Containers/Shared/AppGroup/189E5907-E6E4-4790-833F-06944E4FF5FF/data-model/TheDataModel
When running the widget extension, the store location is:
file:///private/var/mobile/Containers/Shared/AppGroup/189E5907-E6E4-4790-833F-06944E4FF5FF/data-model/TheDataModel
When I run the Watch app, the store location is different:
file:///private/var/mobile/Containers/Shared/AppGroup/55381E6D-410E-4322-93BA-64BD1933909E/data-model/TheDataModel
How do I get the Watch app to see the Core Data store from the main app? Do I have to replicate the store to that location every time something changes in the main app? Or do I have to go back to sending massive data sets as dictionaries/data via WatchConnectivity?
Hey all. I've been rewriting my Objective-C app in SwiftUI (it's going well, thanks!) and I'm hitting this issue that I thought I'd solved ages ago.
I have version 5.1 of my original ObjC app using version 11 of the Core Data model. I've created a new version 12, added a couple of new attributes, and created a mapping model from 11 to 12.
The fields I've added are booleans, and I've set them to have a default value of NO so that new entries will automatically get NO, but there are existing records that don't have that field at all, and I'd like them to also get NO (or YES, depending on something in the other fields, but I haven't figured out how to do that yet).
This is how Core Data is set up in the new Swift target:
public extension URL {
// Returns a URL for the given app group and database pointing to the sqlite database
static func storeURL(for appGroup: String, databaseName: String) -> URL {
guard let fileContainer = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup)?.appending(path: kCoreDataFolder) else {
logger.error("Shared file container could not be created.")
fatalError("CoreData: Shared file container could not be created.")
}
return fileContainer.appendingPathComponent("\(kCoreDataModel)")
}
}
// MARK: - Persistence Controller
struct CoreData {
static let shared = CoreData()
let container: NSPersistentContainer
init() {
let storeURL = URL.storeURL(for: kAppGroup, databaseName: kCoreDataModel)
let storeDescription = NSPersistentStoreDescription(url: storeURL)
container = NSPersistentContainer(name: kCoreDataModel)
container.persistentStoreDescriptions = [storeDescription]
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
logger.error("Failed to initialise Managed Object Model from url: \(storeURL), with error: \(error), \(error.userInfo)")
fatalError("CoreData: Failed to initialise Managed Object Model from url: \(storeURL), with error: \(error), \(error.userInfo)")
}
})
container.viewContext.automaticallyMergesChangesFromParent = true
}
When I run the old app on the Simulator it adds some demo data (using model v11), and the app functions properly. If I then install the new version - using v12 - it fails with a Core Data error because it couldn't migrate the data. (Apologies, I cannot get the exact error at the moment as I'm part-way through redoing some other stuff and the app won't build.)
I've read somewhere that "When we use the NSPersistentContainer class to create and manage the Core Data stack, we don't need to do any additional setup work, the lightweight migration is automatically activated for us." But if that's the case, why does my app crash? I'll try and get the exact error for you...
How do I implement lightweight migration in Swift? This page suggests creating a persistent coordinator and adding a couple of options, but I can't quite figure out how to do that with the code I already have, and each time I try it seems to beat the original store so I keep going back to the above code because it works.
According to this Apple page, if you make any money from your apps in the EU you have to provide your email address, phone number and address, and they will be displayed on your App Store page for all and sundry to see, use, and likely, abuse.
I don't want anyone and everyone to know those details; they are private. I thought Apple was all about privacy? I understand they have to adhere to the DSA, but Apple hasn't raised a single objection to this.
Apple has consistently said that not sharing a user's email address with a developer is a part of being in the App Store, i.e. Spotify can't contact someone who downloaded their app; but a user can now contact the developer?
I barely make any money from my apps - not even enough to cover the annual developer program fee - but I keep developing to stay current. I cannot afford a PO Box or business address and phone number to shield me from this, so I'm likely to remove my apps from the EU market.
You might think I'm being overly-cautious, or having a knee-jerk reaction, but these are my personal, private details, and they should not be available publicly just because I barely clear £1.50 a month from my apps.
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