When I try to re-open the storyboard I was just editing in the current production version of Xcode it says"The document Main.storyboard could not be opened. The operation couldn't be completed. (com.apple.InterfaceBuilder error -1)"What in the world do I do to fix that? I *really* don't want to go back to my last git commit for that file because there have been quite extensive changes with pretty complex autolayout settings.

On a view controller shown as part of a UINavigationController's stack, how do I tell if the Back button was pressed? The previously suggested answer from ages ago, to check isBeingDismissed(), seems to always return a false value.

In Apple's documentation it says this:"This method, though convenient, is inefficient if used multiple times in succession. Achieve better performance by chaining filters without asking for the outputs of individual filters."That confuses me though because I don't know how to link them together without getting the output. For example, this is my method to apply a TiltShift filter, based on the instructions from Apple's docs. When I perform the gradient filter, I have to take the outputImage of that to pass into the next filter. What's the right way to be doing this? override public var outputImage: CIImage? { guard let inputImage = inputImage else { return nil } let clamped = inputImage.clampedToExtent() let blurredImage = clamped.applyingGaussianBlur(sigma: inputRadius) var gradientParameters = [ "inputPoint0": CIVector(x: 0, y: 0.75 * inputImage.extent.height), "inputColor0": CIColor(red: 0, green: 1, blue: 0, alpha: 1), "inputPoint1": CIVector(x: 0, y: 0.5 * inputImage.extent.height), "inputColor1": CIColor(red: 0, green: 1, blue: 0, alpha: 0) ]; guard let gradientImage = ciImage(from: "CILinearGradient", parameters: gradientParameters) else { return nil } gradientParameters["inputPoint0"] = CIVector(x: 0, y: 0.25 * inputImage.extent.height) guard let backgroundGradientImage = ciImage(from: "CILinearGradient", parameters: gradientParameters) else { return nil } let maskParameters = [ kCIInputImageKey: gradientImage, kCIInputBackgroundImageKey: backgroundGradientImage ] guard let maskImage = ciImage(from: "CIAdditionCompositing", parameters: maskParameters) else { return nil } let combinedParameters = [ kCIInputImageKey: blurredImage, kCIInputBackgroundImageKey: clamped, kCIInputMaskImageKey: maskImage ] return ciImage(from: "CIBlendWithMask", parameters: combinedParameters) } private func ciImage(from filterName: String, parameters: [String: Any]) -> CIImage? { guard let filtered = CIFilter(name: filterName, parameters: parameters) else { return nil } return filtered.outputImage }

I'm trying to have a navigation link that is triggered programatically. If I use the following code, on iOS, then the second NavigationLink is not put into the UI, as expected. On watchOS, however, there's a visible button with no text. How can I accomplish this on watchOS? var body: some View {   NavigationView {     VStack {       NavigationLink("No login required", destination: UnprotectedView())       NavigationLink(destination: ProtectedView(), isActive: $isActive) {         EmptyView()       }       Button("Login required", action: pushIfAuthenticated)     }     .navigationBarTitle("Choose")   } }

I'm trying to write a method to take a string and break it up into an array where each element of the array is the next 10 characters. So a string that's 32 characters long would end up with 3 array elements containing the first 30 characters, and then the 4th array element would have the last 2 characters. I was trying to use substringWithRange for this but as soon as I advance past the str.endIndex it throws an exception, and I can't figure out how to work around that. I know it's just a silly syntax thing, but I'm stuck.

I'm trying to wrap my head around Combine still, and so in my class that handles web requests I've written this method:static func downloadNumbersPublisher(datesByType: [LottoType: (start: Date, end: Date)]) -> URLSession.DataTaskPublisher { guard let url = downloadUrl(using: datesByType) else { return } var request = URLRequest(url: url) request.addValue("gzip", forHTTPHeaderField: "Accept-Encoding") let session = URLSession(configuration: .ephemeral) return session.dataTaskPublisher(for: request) }What I'm not clear on though is what I actually return on line 2, the guard statement.

How do I get errors from the simulator when something is wrong with the pkpass file? I have a 'good' version of my pass.json that drags into the simulator without issues. I have a different version that does nothing, so clearly something is wrong with the JSON, but I can't find what.In the simulator I've done Debug -> Open System Log but when I drag in the bad pkpass file, nothing is displayed.

Apple's docs show using NSString.localizedUserNotificationString for local push notifications in Swift. Why not just use the normal NSLocalizedString() methods? Is there something special about the former method?

Everything I see from googling says that time travel is gone now on the Apple Watch. However, if I create a brand new watchOS project with complications, there's still a getTimelineEntries(for:after:limit:withHandler) method. So if it exists, how do I use it now, since the setting seems to be gone from the watch app, and if it doesn't, why does the default template still include it?

In the WWDC2020 "Keep your complications up to date" session, Mike shows that you have to create an App ID that ends with ".watchkitapp.complication" in order to support PushKit. Any time I try to add ".complication" to the end of my App ID, it gives an error: An App ID with Identifier 'com.x.y.watchkitapp.complication' is not available. Please enter a different string.

My standalone watchOS app is trying to read from the calendar via EventKit. It seems to only see local calendars though, not any of my iCloud calendars. Do I have to do something special to be able to view the iCloud based calendars?

I'm trying to implement WidgetKit on my watchOS 9.1 app. When I'm editing the watch face, I see the widget looking as I would expect it to be. However, when I then go to the Home Screen, the data is redacted. What's causing that to happen? I don't do anything luminance or security related in the widget's view: struct AccessoryRectangularView: View {   let tide: Tide      var body: some View {     HStack {       VStack(alignment: .leading) {         Text("Height: \(tide.heightString())")           .font(.headline)           .widgetAccentable()         Text("As of: \(tide.date, style: .time)")           .font(.caption)       }              tide.image()     }   } }

When sharing a watch face that includes complications, the CLKComplicationDataSource method gets called. When switching to WidgetKit, is there an equivalent method that gets called?

I see that if I go to the CloudKit web services pages that they're in an archived area. I've got (really old) PHP code that processes data and then uploads it to a public container. Should I be changing to something different?

When my SwiftUI based watch app responds to an WKSnapshotRefreshBackgroundTask, how do I change the navigation stack? Before using SwiftUI we'd just do this: if let root = WKExtension().shared.rootInterfaceController { 		root.pushController(withName: "Controller1", context: nil) 		root.pushController(withName: "Controller2", context: nil) } And now I'd have the screen I wanted. Not sure how to accomplish that same thing with SwiftUI