Hard to believe something this old doesn't work, but it appears so. I set the top to 10 and the bottom to 0, but it uses 10 for both. Am I doing something wrong, or is it a bug? sv.edgeInsets = .init(top: 10, left: 10, bottom: 0, right: 0) Screenshot: Full code example below. (This is the ViewController.swift file after creating a new Xcode project with "Interface" of "Storyboard". No other changes to the project template.) class ViewController: NSViewController {     override func viewDidLoad() {         super.viewDidLoad()         let sv = NSStackView()         sv.translatesAutoresizingMaskIntoConstraints = false         let v1 = ColoredBlock(.red, width: 20)         let v2 = ColoredBlock(.green, width: 20)         let v3 = ColoredBlock(.blue)         sv.addArrangedSubview(v1)         sv.addArrangedSubview(v2)         sv.addArrangedSubview(v3)         sv.spacing = 0         sv.edgeInsets = .init(top: 10, left: 10, bottom: 0, right: 0)         // sv.setContentHuggingPriority(.required, for: .vertical)         view.addSubview(sv)         pinToFourEdges(view, sv)     } } class ColoredBlock: NSView {     let intrinsicHeight: CGFloat     let intrinsicWidth: CGFloat     init(_ color: NSColor, width: CGFloat = NSView.noIntrinsicMetric, height: CGFloat = NSView.noIntrinsicMetric) {         intrinsicWidth = width         intrinsicHeight = height         super.init(frame: .zero)         self.wantsLayer = true         if let layer = self.layer {             layer.backgroundColor = color.cgColor         }     }     required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }     override var intrinsicContentSize: NSSize {         return NSSize(width: intrinsicWidth, height: intrinsicHeight)     } } public func pinToFourEdges(_ view1: NSView, _ view2: NSView) {     view1.topAnchor.constraint(equalTo: view2.topAnchor).isActive = true     view1.bottomAnchor.constraint(equalTo: view2.bottomAnchor).isActive = true     view1.leftAnchor.constraint(equalTo: view2.leftAnchor).isActive = true     view1.rightAnchor.constraint(equalTo: view2.rightAnchor).isActive = true }

Does anyone use the new hierarchical data List (ie, OutlineGroup) with a model where the tree data changes? I'm on Big Sur beta. I have code like this: List([treeRoot], children: \.children) { item in ... Say the treeRoot (observed object) gets a new child. The view tries to re-render and fails: 2020-09-21 ... [General] NSOutlineView error inserting child indexes <_NSCachedIndexSet: 0x600000760000>[number of indexes: 1 (in 1 ranges), indexes: (3)] in parent 0x0 (which has 1 children).

Here's a simple demo. I run it on macOS 12.1, compiled with Xcode 13.2. struct ContentView: View {     var body: some View {         VStack {             Text("ee")             Text("eé") Text("e\u{E9}") // "e with acute"             Text("ee\u{301}") // "combining acute"         }.font(.custom("Avenir", fixedSize: 18))          .padding(20)     } } In the 4rd one, the "e" is rendered in the wrong size/font. Screenshot: Other fonts do not have the problem. For example, "Avenir Next" and "Helvetica". Is there a way (in code) to tell which fonts can handle combining chars? Is this a bug? I notice the same thing happens when I use Core Text to draw the strings at a low level. So it's not just SwiftUI. In TextEdit, if have Avenir font, type "option-e" + "e" I get a nice letter. Maybe TextEdit is doing what Xcode did in the second line, and using the "e with acute" unicode character.

I'm wondering how SwiftUI updates work in connection with ObservableObjects. If a SwiftUI View depends on an `ObservableObject`, the object's `objectWillChange` publisher fires, and SwiftUI learns about the change, before the change happens. At this point, SwiftUI can't re-render a View, right? Because the new properties aren't there yet. So what does SwiftUI do? Does it schedule the change for later? That doesn't make sense either - how can it know when the object will be ready to be used in a new rendering of the UI? ~ Rob

I have a UIScrollView, and its subview inside needs to respond to some touchesMoved events without scrolling. I've got it mostly working, but with one sticking point that confuses the user: if I touch and quickly move my finger, then the UIScrollView takes the gesture as a scroll, and never calls the touchesBegan, touchesMoved, etc., of its subview. However, if I touch, then pause for a bit, then drag, then things work as intended: the subview gets touchesBegan, touchesMoved, etc., and things are handled without any scrolling. On my UIScrollView, I've set: delaysContentTouches = false canCancelContentTouches = true And I've overrode touchesShouldCancel(in view: UIView). But that does not get called in the case when I quickly drag my finger. Is there something else I need to do?

My app crashes and Xcode shows no stack trace. It just pops up some line of assembly language in __pthread_kill, and shows this in the console: [error] precondition failure: invalid value type for attribute: 230424 (saw PreferenceKeys, expected ViewList) AttributeGraph precondition failure: invalid value type for attribute: 230424 (saw PreferenceKeys, expected ViewList). Seems like a bug in SwiftUI. Any ideas? This is on macOS 11.

I can't debug my metal shaders anymore. The GPU button just says this: I have a lot of metal code so I'm not sure what triggered it. The "?" button does nothing. Any pointers on where to look? Are there certain APIs that do this?

I've been working on an iOS app with UIDocuments. They were saving fine. Now all of a sudden, after unrelated changes, nothing will save. Here is the error printed in Xcode console: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL URLByAppendingPathExtension:]: component, components, or pathExtension cannot be nil.' log.debug("save to:\(self.document.fileURL)") document.save(to: document.fileURL, for: .forOverwriting) { success in ... } The log message there prints a valid URL.

I'm surprised this simple code still doesn't work on iOS 13.3 / Xcode 11.3. On my iPhone SE it's almost all off screen.It's just two pieces of text, side by side, and two pickers, side by side. Anyone know a workaround? struct ContentView: View { @State var choice: Int = 10 @State var choice2: Int = 10 var body: some View { return VStack { HStack { Text("Some text here") Spacer() Text("Foo baz") } HStack { Picker(selection: self.$choice, label: Text("C1")) { ForEach(0..&lt;10) { n in Text("\(n) a").tag(n) } } Picker(selection: self.$choice2, label: Text("C2")) { ForEach(0..&lt;10) { n in Text("\(n) b").tag(n) } } } } } }

My project builds after a clean, but then fails to build. I can't understand these error messages. I have a macOS app target ("MyArchives") and a library target ("HelpPG") in the project. The app uses the library. Logically, there is no cycle. The library is an attempt to wrap PostgreSQL's libpq with some Swift stuff. It works when it runs after the clean build. I don't know what it's talking about with "headers before sources". That is already the case for the library target. There are no headers in the app target (which is all Swift). For readability, strings were substituted: [DEBUG] = /Users/me/Library/Developer/Xcode/DerivedData/MyArchives-flyvnqgqeolefjeztyopfnoaqmaj/Build/Products/Debug [UUID1] = bb030422ec80ba11076c24bcbd7fcd674d61e6313e2915ec58f3544977cb99a4 [UUID2] = bb030422ec80ba11076c24bcbd7fcd67db6f662ae7c65be0e231d735b4905dc3 Showing All Messages Cycle in dependencies between targets 'MyArchives' and 'HelpPG'; building could produce unreliable results. This usually can be resolved by moving the target's Headers build phase before Compile Sources. Cycle path: MyArchives → HelpPG → MyArchives Cycle details: → Target 'MyArchives' has copy command from '[DEBUG]/libHelpPG.dylib' to '[DEBUG]/MyArchives.app/Contents/Frameworks/libHelpPG.dylib' → Target 'HelpPG' has link command with output '[DEBUG]/libHelpPG.dylib' ○ Target 'HelpPG' has copy command from '/usr/local/pgsql/lib/libpq.5.13.dylib' to '[DEBUG]/libpq.5.13.dylib' ○ Target 'HelpPG' has link command with output '[DEBUG]/libHelpPG.dylib' Raw dependency cycle trace: target: -> node: <all> -> command: <all> -> node: [DEBUG]/MyArchives.app/Contents/Frameworks/libHelpPG.dylib -> command: target-MyArchives-[UUID1]-:Debug:PBXCp [DEBUG]/libHelpPG.dylib [DEBUG]/MyArchives.app/Contents/Frameworks/libHelpPG.dylib -> node: [DEBUG]/libHelpPG.dylib/ -> directoryTreeSignature: ~ -> directoryContents: [DEBUG]/libHelpPG.dylib -> node: [DEBUG]/libHelpPG.dylib -> CYCLE POINT -> command: target-HelpPG-[UUID2]-:Debug:Ld [DEBUG]/libHelpPG.dylib normal -> node: [DEBUG]/libpq.5.13.dylib -> command: target-HelpPG-[UUID2]-:Debug:PBXCp /usr/local/pgsql/lib/libpq.5.13.dylib [DEBUG]/libpq.5.13.dylib -> node: <target-HelpPG-[UUID2]--phase1-compile-sources> -> command: Gate target-HelpPG-[UUID2]--phase1-compile-sources -> node: <Linked Binary [DEBUG]/libHelpPG.dylib> -> command: target-HelpPG-[UUID2]-:Debug:Ld [DEBUG]/libHelpPG.dylib normal

I'd like to use the new localization screenshots and test plans feature to take screenshots in different languages, for the app store. I end up with images that are half one screen and half another, like it's some kind of timing issue. My test code is below. Is it missing something that would give it the right timing on the screenshots?I wrote a UI test and set "Localization Screenshots" to "On" in the test plan's settings. The UI test walks through a few screens and the resulting test report has a few image files attached labeled "Localization screenshot". Some images are are split so that the left side is one view controller and the right side is another, like it captured a push navigation transition. Another image has two overlaid screens, each half faded.I'm running in the simulator. My test code looks like: func testTakeScreenshots() { let app = XCUIApplication() app.launch() // At workouts page app.tables["workouts"].cells.element(boundBy: 0).tap() // At first workout app.navigationBars.buttons["edit"].tap() // At workout edit screen, click first exercise app.tables.cells.element(boundBy: 0).tap() ... }

It's a simple question. I'm just trying to understand how these things fit together. Core Text doesn't seem to get updated much, but maybe that's because it's low level and doesn't need it. I assume it's still the recommended way to do low-level text things not handled by TextKit. ?

This appears to severely limit the usefulness of hierarchical lists in SwiftUI. I want to use the new hierarchical list/outline to display a filesystem tree. For data to pass to OutlineGroup, I created a class named FileSystemNode, and gave it a computed children property. When the getter is first called, it will read its directory contents to return a list (if it is a directory). Problem is, when the OutlineGroup is first displayed, even though it is collapsed on-screen to a single node, it calls children and recurses over the entire filesystem. Is there a way to stop this? If not, I hope it gets fixed before release. (This is on macOS Big Sur beta)

I expected the initializer NLLanguage(rawValue: "...") to return nil if I gave it junk, but it doesn't. It accepts any string. I'm loading values from a database so I'd like to know if I'm getting one that is valid, like "en", "es", etc., as opposed to an error. Is there anyway to check that? I'm using it to set NLLanguageRecognizer.languageConstraints, so I guess by "valid" I mean all the languages that work with that property. The struct has a bunch of static constants: struct NLLanguage { static let english = ... static let spanish = ... ... } If those all work with NLLanguageRecognizer I guess I can paste them all into a dictionary.

If I go to the Xcode documentation viewer and type simd_float3x3 in the search field, nothing comes up. I swear these things used to have documentation. Where is it? Is it a bug? (Xcode 13.4.1)