macOS Yosemite 10.10.5; Xcode 6.4 In testing a vanilla Document app I tracked down what may be a bug in Cocoa. I expected that the app would not open an untitled file because applicationOpenUntitledFi

I have a UIImageView, which I load with the following function: func loadData() { guard let recipe = recipe, let fileN = recipe.photo, !fileN.isEmpty else { imageView.image = nil xableTrashButton() re

I’m in the deepest darkest jungles of ferocious downtown Africa at the moment (yeah, science) and if I‘m not smoking crack again, all of my business meetings are jacked up by an hour because something

I've been trying track the correct path from document to Control and back again. Document automatically loads WindowController.document I use didSet to loop down the ViewControllers and set there View

I have a little app that writes alias files to its App Support folder on a regular basis. The app is sandboxed, so that ends up in ~/Library/Containers/<apputi>/Data/Library/Application Support/<appna

This works: - (void)lookUppString:(NSPasteboard *)pboard userData:(NSString *)data error:(NSString * _Nullable *)error { NSLog(@“%s",__FUNCTION__); } But this does not: func lookUppString(_ pboard: NS

I have a Swift project called TestSwift: import Cocoa @NSApplicationMain class AppDelegate: NSObject, NSApplicationDelegate { @IBOutlet weak var window: NSWindow! func applicationDidFinishLaunching(_

macOS 13.5 I made a WkWebView and added navigationDelegate and uiDelegate and implemented (almost) all delegate methods, each containing a print(). 1. I never see any prints (running in Xcode) 2. the

This works: lazy var session = makeSession() func makeSession() -> URLSession { let sessionConfig = URLSessionConfiguration.ephemeral return URLSession( configuration: sessionConfig ) } First: is it p

WebView is sort of deprecated. “In apps that run in OS X 10.10 and later, use the WKWebView class instead of using WebView” But: how can I get the DOMDocument of a WkWebView? I navigate (using WebView

Applications on macOS respond to command-backquote and shift-command-backquote by bringing one of the application's non-frontmost windows to the front. I have these questions about how this works: 1.

I am working on an app which I would like to support 10.x for the next release. The problem I have is in a UITableViewDelegate: I have two actions which I'd like to implement for cells. In 10.x, I hav

I have a situation where I want a user tap on a UILabel to generate a segue. (Yes, it sounds a bit strange, but it makes sense in context.) Working with a storyboard, I add a Tap Gesture Recognizer, c

Is there a replacement for LSSharedFileListCreate, LSSharedFileListInsertItemURL &c that have been deprecated in the latest SDKs? Or is there another way to add something to the Finder's sidebar or to

Hi all, I’ve been trying to figure out what happened on an overnight run of the code that drives our scientific experiment, and I’m seeing logs that imply that a timer has been firing much more rapidl

Hi all, We’ve received a number of reports from users of a crash due to a SIGILL as follows: Exception Type: SIGILL Exception Codes: ILL_ILLOPC at 0x7fff32837454 Crashed Thread: 0 Thread 0 Crashed: 0

I have an App that needs to be upgraded (thanks App Store) and I want the new App to Open and migrate it’s old documents to the new versions document. With the new File Type and Extension. All good, I

Hi, I have a metronome app that is able to play audio in the background just fine. It even continues playing when the screens is locked. That is, until the screen goes dark after a few seconds. Playba

I have an app (macOS 13.4, Xcode Version 9.3 (9E145)) which was localised (Xcode did some magic for me). Now I made some changes. Is there a way to update the Localizable.string, MainMenu.strings, etc

I have an NSTextField (macOS 13.4, Xcode Version 9.3 (9E145)) which says: textColour Generic Gray colorspace 1 1 backGroundColour NSCalibratedWhiteColorSpace 0 0.4 This, I guess, means all white and a