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My iNet works fine but Numbers.app, Pages.app etc. not downloading.
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I use as many cpu's as I can get with DispatchQueue. How do I test the Mac for cpu count in my code?
This is the second issue in my post "ProgressBar with DispatchQueue", delegation.
I have used delegates with menu items but not program vars.
In the previous post my ViewController has a progress bar but I would like the progress.DoubleValue var to be updated in a remote function, i.e., a function not declared within the ViewController class. (If I moved the function into the ViewController it would double in size.)
How do I create and implement such a delegate? Please give example code. Thanks.
The model increments through a range of dates converted to Double and scaled, ranging from 0 to 1.0
I wish to show a determinate progress bar.
As I understand it, the ProgressView() must be declared in the ContentView and its progress var must be declared as a @State var
The ContentView declares the model vars as @EnvironmentObjects
If I declare:
@State private var = model.progressValue
I get the error:"Cannot use instance member 'model' within property initializer; property initializers run before 'self' is available"
btw the model class declares:
@Published var progressValue : Double
The model func (to increment through dates) is launched by a button in the ContentView.
idk how to get the incremented progressValue from the model to the ContentView State var.
Attached is an entire project (4 files) that mirrors my actual project including the failure to save to file.
Am I:
missing some syntax in this code?
failing to config a defaults file?
not set the necessary parameters in " "Build Settings" or "Build Rules etc.?
I was writing to JSON files, but now that I must append to files directly, and JSON doesn't do that easily, I am trying to write using native macOS tools.
WELL, IT SEEMS I CAN'T SEND YOU THE CODE, TOO MANY CHARS. I CAN'T ATTACH ANY FILE EITHER. WHY OFFER IT IF IT IS NOT ALLOWED?
ANYWAY, CAN YOU GLEAN ANYTHING FROM THIS... Thanks.
My debugger area:
2022-05-28 12:03:11.827372-0500 exampleClassInClassSecureCoding[1508:29981] Metal API Validation Enabled
2022-05-28 12:03:11.940123-0500 exampleClassInClassSecureCoding[1508:29981] *** NSForwarding: warning: object 0x600003cf7090 of class 'exampleClassInClassSecureCoding.classOne' does not implement methodSignatureForSelector: -- trouble ahead
Unrecognized selector -[exampleClassInClassSecureCoding.classOne replacementObjectForKeyedArchiver:]
2022-05-28 12:03:11.940416-0500 exampleClassInClassSecureCoding[1508:29981] Unrecognized selector -[exampleClassInClassSecureCoding.classOne replacementObjectForKeyedArchiver:]
Unrecognized selector -[exampleClassInClassSecureCoding.classOne replacementObjectForKeyedArchiver:]
Performing @selector(didPressButton:) from sender _TtC7SwiftUIP33_9FEBA96B0BC70E1682E82D239F242E7319SwiftUIAppKitButton 0x7ff08ab06480
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My app generates piecemeal near terabyte data distributed over one hundred files. Due to RAM and internal HD limitations I must store to an external HD in piecemeal fashion. That is to say, append fresh records directly to an existing file without reading-in the whole file, appending, and writing it out again.
Ultimately (when data generation ceases) I will check each file to ensure uniqueness of member data structures.
Is Core Data the tool I should use?
If not, how do I append directly to disk-files without first reading it in?
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I print a lot of SIMD3 vectors to the debugger area in Xcode. Some vector-elements have prefixed signs and some values are longer than others. I would like the printed vectors to align as they did in my old days of Fortran.
The SIMD3 members are scalars which can't be cast as Double ( I know how to format output for Double) or even as NSNumber.
Something akin to a NumberFormatter for vectors would be the objective, but I don't see how to do it. Scalars are wierd and (helpful) documentation sparse.
Post not yet marked as solved
it may not deliver what you expect. For example:
if you are using NASA/JPL/Standish equations of heliocentric planetary motion, it requires:
"3. Modulus the mean anomaly (M) so that -180deg<=M<=+180deg and then obtain the eccentric anomaly, E, from the solution of Kepler's equation..."
If you attempt to use the Swift "Modulo operator, %" you'll get the Xcode directive to use truncatingRemainder instead.
Which IS better than % because of this note in "The Swift Programming Language (Swift 5.3)":
"“NOTE
The remainder operator (%) is also known as a modulo operator in other languages. However, its behavior in Swift for negative numbers means that, strictly speaking, it’s a remainder rather than a modulo operation.”
Excerpt From
The Swift Programming Language (Swift 5.3)
Apple Inc.
https://books.apple.com/us/book/the-swift-programming-language-swift-5-5/id881256329
This material may be protected by copyright.
But you should try truncatingRemainder in your playground!
Let: 0deg = 12 O'clock, 180/-180deg = 6 O'clock, -90deg = 9 O'clock and +90deg = 3 O'clock
Now run this on your playground:
let M = -181.25
var M180 = M
while M180 > 180.0 { M180 -= 360.0 }
while M180 < -180.0 { M180 += 360.0 }
print("M = \(M)\t\tM180 = \(M180)\t\tM.truncatingRemainder(dividingBy: 180.0) = \(M.truncatingRemainder(dividingBy: 180.0))\t\tM.truncatingRemainder(dividingBy: 360.0) = \(M.truncatingRemainder(dividingBy: 360.0))")
and you'll get this result:
M = -181.25
M180 = 178.75
M.truncatingRemainder(dividingBy: 180.0) = -1.25
M.truncatingRemainder(dividingBy: 360.0) = -181.25
Thus, truncatingRemainder(dividingBy: 180.0) puts your planet 180deg away from where it should be, while M180 keeps the planets moving without quantum leaps.
took a bit of experimenting...
import AVKit // macOS & iOS
class ViewController_myShow: NSViewController {
@IBOutlet var myMOV: AVPlayerView!
10.
override func viewDidLoad() {
super.viewDidLoad()
let playerView = AVPlayerView()
20.
21. playerView.translatesAutoresizingMaskIntoConstraints = false
22.
23. view.addSubview(playerView)
24.
25.
26.
27. playerView.leadingAnchor.constraint (equalTo: view.safeAreaLayoutGuide.leadingAnchor ).isActive = true
28.
29. playerView.trailingAnchor.constraint (equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
30.
31. playerView.topAnchor.constraint (equalTo: view.safeAreaLayoutGuide.topAnchor ).isActive = true
32.
33. playerView.bottomAnchor.constraint (equalTo: view.safeAreaLayoutGuide.bottomAnchor ).isActive = true
34.
35.
36.
37. playerView.controlsStyle = .floating
38.
39. playerView.showsFrameSteppingButtons = true
40.
41. playerView.showsFullScreenToggleButton = true
42.
43.
44.
45. guard let path = Bundle.main.url(forResource: "myMovie", withExtension: "mov") else { return }
46.
47.
48.
49. let player = AVPlayer(url: path)
50.
51. playerView.player = player
52.
53. playerView.player?.play()
54.
55. }
56.
57. }
The StoryBoard:AttributesInspector:AVPlayerView settings don't work for me... exactly. I had to set StoryBoard:AttributesInspector:AVPlayerView:ControlsStyle:none then include lines 37-41 in my code.
The default is StoryBoard:AttributesInspector:AVPlayerView:ControlsStyle:inline which appears on screen but does nothing, i.e., no control.
Line 21 is also required to be false.
The .mov file can be File:AddFilesTo 'd or copied to Assets.xcassets
see also:
Developer Forum:
"can't get extremely simple macOS video player to work..."
https://developer.apple.com/documentation/avfoundation/media_playback_and_selection/creating_a_basic_video_player_macos
			
I have searched but cannot find an example of this.
In my example I use playground to nest for-loops in a function called from within DispatchQueue.
I find many roadblocks:
//import AppKit // playground doesn't recognize AppKit?!
import Dispatch
import Foundation
var comboCount:NSKeyValueObservation?
//class viewContr: NSViewController {
@IBOutlet weak var progressBar: NSProgressIndicator!
// deinit { comboCount?.invalidate() }
@IBAction func calcStuff() {
DispatchQueue.global(qos: .userInitiated).async {
let combos = possibleCombos()
DispatchQueue.main.async {
for word in combos {
word.print0b8()
}
}
}
}
//}
func possibleCombos() -> [Int8] {
var combos = [Int8]()
for a in [0, 1] {
for b in [0, 1] {
for c in [0, 1] {
for d in [0, 1] {
combos.append(Int8(d | (c << 1) | (b << 2) | (a << 3)) )
comboCount = combos.count/16 as! NSKeyValueObservation
// known total combos = 16
// How do I pass combos.count out to a progress bar?
}
}
}
}
return combos
}
extension Int8 {func print0b8() {print("0b" + pad(string: String(self, radix: 2), toSize: 4))}}
func pad(string : String, toSize: Int) -> String {var padded = string;for _ in 0..<(toSize - string.count) {padded = "0" + padded};return padded}
Removing the @IB obstacles and the attempted declaration of a ViewController does produce output, but can't be used with a progress bar, e.g.,
import Dispatch
import Foundation
DispatchQueue.global(qos: .userInitiated).async {
let combos = possibleCombos()
DispatchQueue.main.async {
for word in combos {
word.print0b8()
}
}
}
func possibleCombos() -> [Int8] {
var combos = [Int8]()
for a in [0, 1] {
for b in [0, 1] {
for c in [0, 1] {
for d in [0, 1] {
combos.append(Int8(d | (c << 1) | (b << 2) | (a << 3)) )
// known total combos = 16
// How do I pass combos.count out to a progress bar?
}
}
}
}
return combos
}
extension Int8 {func print0b8() {print("0b" + pad(string: String(self, radix: 2), toSize: 4))}}
func pad(string : String, toSize: Int) -> String {var padded = string;for _ in 0..<(toSize - string.count) {padded = "0" + padded};return padded}
In my actual App, i.e., not this playground, I have a ProgressBar in my storyboard and an IBoutlet declared in my view controller. I just can't find how to pass a value out of "possibleCombos()" and into the NSProgressIndicator.
What I have read suggests a delegate but reading about delegates hasn't helped. I need an example.
Thanks.
Code to draw a graph of data. Each abscissa has an ordinate range to be displayed as a line segment.
All data, i.e., scaled points are verified to be within the declared analysisView.bounds. strokeColors are verified within the range 0..1
BTW, no I don't need animation for this static data, but CALayer seemed to require more coding, and I found fewer code examples for it.
The code below has two problems:
1) it doesn't draw into the window
the weird behavior of min/max
The first is why I am posting. What am I missing?
import AppKit
class AnalysisViewController: NSViewController {
@IBOutlet var analysisView: NSView!
var ranges = [ClosedRange<Double>]()
var ordinateMinimum = CGFloat()
var ordinateMaximum = CGFloat()
var ordinateScale = CGFloat()
let abscissaMinimum:CGFloat = 1
let abscissaMaximum:CGFloat = 92
let abscissaScale :CGFloat = 800/92
let shapeLayer = CAShapeLayer()
var points = [CGPoint]() // created just to verify (in debugger area) that points are within analysisView.bounds
func genrateGraph() {
// ranges.append(0...0) // inexplicably FAILS! @ ordinateMinimum/ordinateMaximum if replaces "if N == 1" below
// ranges.append(0.1...0.1) // non-zero range does not fail but becomes the min or max, therefore, not useful
for N in 1...92 {
if let element = loadFromJSON(N) {
if N == 1 { ranges.append( element.someFunction() ) } // ranges[0] is an unused placeholder
// if N == 1 { ranges.append(0...0) } // inexplicably FAILS! @ ordinateMinimum/ordinateMaximum if replacing above line
ranges.append( element.someFunction() )
}
else { ranges.append(0...0) } // some elements have no range data
}
ordinateMinimum = CGFloat(ranges.min(by: {$0 != 0...0 && $1 != 0...0 && $0.lowerBound < $1.lowerBound})!.lowerBound)
ordinateMaximum = CGFloat(ranges.max(by: {$0 != 0...0 && $1 != 0...0 && $0.upperBound < $1.upperBound})!.upperBound)
ordinateScale = analysisView.frame.height/(ordinateMaximum - ordinateMinimum)
for range in 1..<ranges.count {
shapeLayer.addSublayer(CALayer()) // sublayer each abscissa range so that .strokeColor can be assigned to each
// shapeLayer.frame = CGRect(x: 0, y: 0, width: analysisView.frame.width, height: analysisView.frame.height) // might be unneccessary
let path = CGMutablePath() // a new path for every sublayer, i.e., range that is displayed as line segment
points.append(CGPoint(x: CGFloat(range)*abscissaScale, y: CGFloat(ranges[range].lowerBound)*ordinateScale))
path.move(to: points.last! )
points.append(CGPoint(x: CGFloat(range)*abscissaScale, y: CGFloat(ranges[range].upperBound)*ordinateScale))
path.addLine(to: points.last! )
path.closeSubpath()
shapeLayer.path = path
// shapeLayer.strokeColor = CGColor.white
let r:CGFloat = 1.0/CGFloat(range)
let g:CGFloat = 0.3/CGFloat(range)
let b:CGFloat = 0.7/CGFloat(range)
// print("range: \(range)\tr: \(r)\tg: \(g)\tb: \(b)") // just to verify 0...1 values
shapeLayer.strokeColor = CGColor(srgbRed: r, green: g, blue: b, alpha: 1.0)
}
}
override func viewDidLoad() {
super.viewDidLoad()
view.wantsLayer = true // one of these (view or analysisView) must be unneccessary
view.frame = CGRect(x: 0, y: 0, width: 840, height: 640)
analysisView.wantsLayer = true
analysisView.frame = CGRect(x: 0, y: 0, width: 840, height: 640)
genrateGraph()
}
}
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How do I access a returned value from a Process(), in this case 'which'... var sips_path : String? //MARK: locate sips on local machine let which_sips = Process() which_sips.executableURL = URL(fileURLWithPath: "which") which_sips.arguments = ["sips"] do { sips_path = try which_sips.run() } catch let error as NSError { sips_path = "/usr/bin/sips"; print("Failed to execute which_sips", error) }line 8. gets compiler error "Cannot assign value of type '()' to type 'String?'" I believe, but cannot prove, 'which' returns a string. .run() throws and throws are for errors only, right? So where is the result of calling which?It seems I should use a closure to use $0 but it's already in one...line 9. intends to assign a default path.
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I have developed an app using SceneKit since Swift came out. Now SwiftUI is out and uses structs rather than classes. SceneKit is a cascade of classes. As a newbie, I am concerned that my code might be obsolete through depreciations soon after publication and I'd rather get ahead of the issues now. So, is SceneKit long-term viable? My first attempts at converting my custom classes to structs seems impossible without Apple leading the way. If I understand correctly, I can make a struct whose only member is an instance of a class, but the benefits of the struct, e.g., minimal memory, processing time, etc., are lost.
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I launch the following runSavePanel() from, e.g.,
@IBAction func JSONall(_ sender: NSButton) {
if !nsPanelActivatedThisSessionForSandbox {
nsPanelActivatedThisSessionForSandbox = true
runSavePanel() }
...
}
where var nsPanelActivatedThisSessionForSandbox = false
is declared as a global in the AppDelegate.swift file and is intended to prevent repeated user prompting as the program creates many files but needs sandbox acknowledgment at least once.
The problem behavior is that upon clicking the OK button, the app merrily creates the files in the chosen directory but the modal window stays open until the app is done creating files (around ten minutes). Here is my runSavePanel() and its (empty) delegate:
func runSavePanel() {
let defaults = UserDefaults.standard
let savePanel = NSSavePanel()
savePanel.canCreateDirectories = true
savePanel.canSelectHiddenExtension = false
savePanel.showsHiddenFiles = false
// savePanel.allowedFileTypes = ["JSON", "csv"] // deprecated
savePanel.directoryURL = defaults.url(forKey: "fileDirectoryPref")
let delegate = OpenSavePanelDelegate() // cannot consolidate with next line
savePanel.delegate = delegate
let result = savePanel.runModal()
if result == NSApplication.ModalResponse.OK {
if savePanel.url != nil {
do {
try savePanel.delegate!.panel!(savePanel, validate: savePanel.url!)
defaults.set(savePanel.url, forKey: "fileDirectoryPref")
// defaults.set(savePanel.url, forKey: "NSNavLastRootDirectory") // does not write
} catch {
print("\(result) ViewController Structures.swift:739 runSavePanel()")
}
}
}
}
class OpenSavePanelDelegate: NSObject, NSOpenSavePanelDelegate {
func panel(_ sender: Any, validate url: URL) throws {
/* In Swift, this method returns Void and is marked with the throws keyword to indicate that it throws an error in cases of failure.
You call this method in a try expression and handle any errors in the catch clauses of a do statement, as described in Error Handling in The Swift Programming Language and About Imported Cocoa Error Parameters.
*/
// throw CustomError.InvalidSelection
}
}
// enum CustomError: LocalizedError {
// case InvalidSelection
//
// var errorDescription: String? {
// get {
// return "\(CustomError.InvalidSelection)"
// }
// }
// }
Idk how to stop the double spacing when pasting my code. Sorry.
The delegate is a requirement but I don't know how to configure it. The app doesn't generate errors... or at least it allows the desired output.
Is the delegate supposed to terminate the modal window somehow?
My SceneView hides part of my NSStackView's TextFields. I don't see anything in the inspector for the z dimension. How can I ensure the StackView is on top, i.e., wholly visible?
I don't want to shove views around to "fit them in". They must overlap.
Indeed, I may wish to have all TextFields, etc. overlay the SceneView in the future, but that's a different subject.
I know this would be easy in SwiftUI, but...
G.U.T.explorer.