I’ve been having a heckuva time getting macOS (Catalina) to let my app open the associated -wal and -shm files. Googling for answers, it seems macOS should already know about these, but if not, I can create NSIsRelatedItemType additions. But that didn't seem to work for me: Is there something more I need to do? If I put the main SQLite file to open inside the app's container, then SQLite can open the associated files just fine. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleDevelopmentRegion</key> <string>$(DEVELOPMENT_LANGUAGE)</string> <key>CFBundleDocumentTypes</key> <array> <dict> <key>CFBundleTypeName</key> <string>SQLiteDocument</string> <key>CFBundleTypeRole</key> <string>Editor</string> <key>LSHandlerRank</key> <string>Default</string> <key>LSItemContentTypes</key> <array> <string>org.sqlite.sqlite3</string> </array> <key>NSDocumentClass</key> <string>$(PRODUCT_MODULE_NAME).Document</string> </dict> &#9;&#9;<dict> &#9;&#9;&#9;&#9;<key>CFBundleTypeExtensions</key> &#9;&#9;&#9;&#9;<array> &#9;&#9;&#9;&#9;&#9;&#9;<string>sqlite-shm</string> &#9;&#9;&#9;&#9;&#9;&#9;<string>sqlite-wal</string> &#9;&#9;&#9;&#9;&#9;&#9;<string>sqlite-journal</string> &#9;&#9;&#9;&#9;</array> &#9;&#9;&#9;&#9;<key>CFBundleTypeName</key> &#9;&#9;&#9;&#9;<string>Support Type</string> &#9;&#9;&#9;&#9;<key>CFBundleTypeRole</key> &#9;&#9;&#9;&#9;<string>Editor</string> &#9;&#9;&#9;&#9;<key>NSIsRelatedItemType</key> &#9;&#9;&#9;&#9;<true/> &#9;&#9;</dict> </array> <key>CFBundleExecutable</key> <string>$(EXECUTABLE_NAME)</string> <key>CFBundleIconFile</key> <string></string> <key>CFBundleIdentifier</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundleName</key> <string>$(PRODUCT_NAME)</string> <key>CFBundlePackageType</key> <string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string> <key>CFBundleShortVersionString</key> <string>1.0</string> <key>CFBundleVersion</key> <string>1</string> <key>LSMinimumSystemVersion</key> <string>$(MACOSX_DEPLOYMENT_TARGET)</string> <key>NSMainStoryboardFile</key> <string>Main</string> <key>NSPrincipalClass</key> <string>NSApplication</string> <key>UTExportedTypeDeclarations</key> <array> <dict> <key>UTTypeConformsTo</key> <array> <string>public.database</string> <string>public.data</string> </array> <key>UTTypeDescription</key> <string>SQLite3</string> <key>UTTypeIcons</key> <dict/> <key>UTTypeIdentifier</key> <string>org.sqlite.sqlite3</string> <key>UTTypeTagSpecification</key> <dict> <key>public.filename-extension</key> <array> <string>sqlite</string> </array> </dict> </dict> </array> <key>UTImportedTypeDeclarations</key> <array> <dict> <key>UTTypeConformsTo</key> <array> <string>public.database</string> <string>public.data</string> </array> <key>UTTypeDescription</key> <string>SQLite3</string> <key>UTTypeIcons</key> <dict/> <key>UTTypeIdentifier</key> <string>org.sqlite.sqlite3</string> <key>UTTypeTagSpecification</key> <dict> <key>public.filename-extension</key> <array> <string>sqlite</string> </array> </dict> </dict> </array> </dict> </plist>

I'm developing a little USB device for use with macOS, and the name includes the non-ASCII character ū: LATIN SMALL LETTER U WITH MACRON Unicode: U+016B, UTF-8: C5 AB My source file is UTF-8 encoded, but as I understand it, USB uses UTF-16LE encoding for all its strings. GCC (which I'm using to compile the code for the device) doesn't implement the \u unicode point escape. So I tried "productname\xc5\xab", which causes USB Prober to report the Product String as "productname\u016b". Is that just USB Prober not properly rendering the string? Or am I still not encoding it correctly?

For years I've poked at a little personal project, an electronic schematic capture app. It's basically a specialized version of something like Illustrator or Omnigraffle, in that you create graphical objects from primitives, instantiate them onto the canvas, and connect them with polylines. I'm very new to SwiftUI, but I'm wondering if it makes sense to build a new custom view to handle drawing this canvas as a "native" SwiftUI view. I know it's possible to wrap NSViews in SwiftUI, but if SwiftUI can handle it, I'd like to just reimplement it. There are a number of requirements that complicate things: This view lives inside a scroll view (or at least, it has bounds that usually extend beyond the window). The view contains custom graphics and text. Some graphical elements span large portions of the canvas (e.g. the poly lines connecting components). The number of individual elements can be quite high (performance concerns). Quadtrees are often used to help with this. It zooms Marquee-selection Mouse down, drag, and up changes the model in significant and varied ways. Hovering can change appearance of some items. Can SwiftUI handle all this? I tried to find an example or documentation, but was not having much luck. Almost everything is iOS-focused, so precise and nuanced mouse handling is uncommon.

I have some code calling this method: mutating func readOffset() UInt64 { let offset: UInt64 debugLog("readOffset") switch (self.formatVersion) { case .v42: let offset32: UInt32 = self.reader.get() offset = UInt64(offset32) case .v43: offset = self.reader.get() } return offset } If I put a breakpoint on the switch statement, Xcode never stops there, and if the debugLog() call is commented out, I can't even step into the function at the call site; it just runs to the next breakpoint in my code, wherever that happens to be. If I put the breakpoint on debugLog(), it stops at the breakpoint. If I put breakpoints at the self.reader.get() calls, it stops at those breakpoints AND I can step into it. This is a unit test targeting macOS, and optimization is -Onone. Xcode 12.4 (12D4e) on Catalina 10.15.7 (19H524).

I’m writing an app that, among other things, displays very large images (e.g. 106,694 x 53,347 pixels). These are GeoTIFF images, in this case containing digital elevation data for a whole planet. I will eventually need to be able to draw polygons on the displayed image. There was a time when one would use CATiledLayer, but I wonder what is best today. I started this app in Swift/Cocoa, but I'm toying with the idea of starting over in SwiftUI (my biggest hesitation is that I have yet to upgrade to Big Sur). The image data I have is in strips, with an integral number of image rows per strip. Strips are not guaranteed to be contiguous in the file. Pixel formats vary, but in the motivating use case are 16 bits per pixel, with the values signifying meters. As a first approximation, I can simply display these values in a 16 bpp grayscale image. Is the right thing to do to set up a CoreImage pipeline? As I understand it that should give me some automatic memory management, right? I’m hoping to find out the best approach before I spend a lot of time going down the wrong path.

Is there documentation describing the semantics of a Metal CIKernel function? I have image data where each pixel is a signed 16-bit integer. I need to convert that into any number of color values, starting with a simple shift from signed to unsigned (e.g. the data in one image ranges from about -8,000 to +20,000, and I want to simply add 8,000 to each pixel's value). I've got a basic filter working, but it treats the pixel values as floating point, I think. I've tried using both sample_t and sample_h types in my kernel, and simple arithmetic: extern "C" coreimage::sample_h heightShader(coreimage::sample_h inS, coreimage::destination inDest) { coreimage::sample_h r = inS + 0.1; return r; } This has an effect, but I don't really know what's in inS. Is it a vector of four float16? What are the minimum and maximum values? They seem to be clamped to 1.0 (and perhaps -1.0). Well, I’ve told CI that my input image is CIFormat.L16, which is 16-bit luminance, so I imagine it's interpreting the bits as unsigned? Anyway, where is this documented, if anywhere (the correspondence between input image pixel format and the actual values that get passed to a filter kernel)? Is there a type that lets me work on the integer values? This document - https://developer.apple.com/metal/MetalCIKLReference6.pdf implies that I can only work with floating-point values. But it doesn't tell me how they're mapped. Any help would be appreciated. Thanks.

In my macOS SwiftUI app I have a list of "layers" on the left. Clicking on a layer focuses it on the right for acting upon. Each link has a little eye icon that's used to toggle visibility of that layer in the view to the right. I'd like to be able to click on that eye button without selecting the layer or activating it. Is that possible?

I've got the following code that updates a @Published var messages: OrderedSetMessage property: swift public func add(messages inMsgs: [IncomingMessage]) { for msg in inMsgs { let msg = Message(fromIncoming: msg, user: user) self.messages.append(msg) } self.messages.sort() } In my SwiftUI view, however, .onChanged(self.stream.messages) gets called three times each time a single message is added. I tried operating on a local copy of self.messages, and then just setting self.messages = local, but that didn't change anything. Maybe the issue is on the SwftUI side? In any case, how are published updates to a property coalesced?

As in the locked question here - https://developer.apple.com/forums/thread/674534, I'm constantly running into this error: Compiling failed: 'main' attribute cannot be used in a module that contains top-level code Once it starts, it's not clear how to stop it. No changes were made to my AppDelegate (It's a mostly-UIKit app that I'm adding some SwiftUI views to). It compiles just fine with a regular build, but the SwiftUI preview can't build it. This is proving to be a real hindrance. I can sometimes clear the condition by cleaning build and test results, and relaunching Xcode. But not always. I filed FB9104575 and included the diagnostics.

I just created a new macOS app project in Xcode 13 beta. SwiftUI, unit tests, no Core Data. I just noticed that it does not add the traditional "Products/MyApp.app" group and file, and I can't figure out how to add those via the UI. At least one solution online edits the pbxproj file directly; I'd rather not do that. Is there any sanctioned way to add this? Is not having it a bug?

I recently created a new app record in AppStoreConnect. The app is still in development and testing, so we use this for TestFlight builds. The app has a complete app icon internally, and shows up in the Simulator and devices correctly. But in AppStoreConnect, it shows the generic app icon placeholder. I contacted Apple support about this, and they told me I needed to include the app icon in the app. I told them I already do, and showed them the screenshots. They basically said sorry, not my problem, try the dev forums. So here I am.

In this talk , at 12:00, the speaker refers to code associated with this talk. But I can't find it anywhere. Is it available?

How do I handle URLs in a SwiftUI app? The only thing I can find is to put onOpenURL in my App's WindowGroup view content, but that makes a new window for every URL that gets handled.

I've developed a specialized web server in Swift using Vapor. I want to set it up to run reliably on macOS using a LaunchDaemon. It should start at boot and be restarted if it crashes. I'm having trouble finding a good guide to the latest flavor of launchctl, and how to use system domains. This is my plist: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Debug</key> <true/> <key>Label</key> <string>com.latencyzero.FurnaceController</string> <key>Program</key> <string>/Users/rmann/Desktop/Run</string> <key>ProgramArguments</key> <array> <string>serve</string> <string>--hostname</string> <string>0.0.0.0</string> <string>--port</string> <string>80</string> </array> <key>KeepAlive</key> <true/> <key>Listeners</key> <dict> <key>SockServiceName</key> <string>http</string> <key>SockType</key> <string>tcp</string> <key>SockFamily</key> <string>IPv4</string> </dict> </dict> </plist> And I'm trying to invoke it like this: $ sudo enable system/com.latencyzero.FurnaceController But nothing happens. If I try kickstart, I get an error: $ sudo launchctl kickstart -p system/com.latencyzero.FurnaceController Could not find service "com.latencyzero.FurnaceController" in domain for system $ sudo launchctl kickstart -p uid/501/com.latencyzero.FurnaceController Unrecognized target specifier. Usage: launchctl kickstart [-k] [-p] <service-target>         -k      Terminates the service if it is already running.         -p      Prints the PID of the service that was started.         -s      Starts the service suspended so that a debugger may attach. <service-target> takes a form of <domain-target>/<service-id>. Please refer to `man launchctl` for explanation of the <domain-target> specifiers. Bootstrap also doesn't work as I'd expect: $ sudo launchctl bootstrap system/com.latencyzero.FurnaceController Usage: launchctl bootstrap <domain-target> [service-path, service-path2, ...] <service-target> takes a form of <domain-target>/<service-id>. Please refer to `man launchctl` for explanation of the <domain-target> specifiers. The plist is in /Library/LaunchDaemons/com.latencyzero.FurnaceController.plist I'd rather not have to launch this in a user domain, as I'm handing this app off to my client, and the fewer customization needed, the better.

I've got a Game @StateObject in my app that's passed to my main ContentView. I'm trying to figure out how best create a SCNSceneRendererDelegate instance that has a reference to the Game state, and then pass that to the SceneView inside my ContentView. I'm trying to do it like this, but obviously this doesn't work because self isn't available at init time: struct ContentView : View { let game : Game var scene = SCNScene(named: "art.scnassets/ship.scn") var cameraNode : SCNNode? { self.scene?.rootNode.childNode(withName: "camera", recursively: false) } var rendererDelegate = RendererDelegate(game: self.game) // Cannot find 'self' in scope var body: some View { SceneView(scene: self.scene, pointOfView: self.cameraNode, delegate: self.rendererDelegate) } } The intent is that in my renderer delegate, I'll update my game's simulation state. Because my game state is an ObservableObject, everything else (I have a bunch of SwiftUI) should update.