I want to load images from my bundle, which works fine when running the main app. However this does not work when running UI Tests. I read that the test bundle is not the main bundle when running tests. I try loading the bundle via this snippet:
let bundle = Bundle(for: Frames_HoerspielUITests.self)
This is my test class wrapped these the canImport statements so it can be added to the main app target and used for getting the correct bundle:
#if canImport(XCTest)
import XCTest
final class Frames_HoerspielUITests: XCTestCase {
override func setUpWithError() throws {
continueAfterFailure = false
}
override func tearDownWithError() throws { }
@MainActor
func testExample() throws {
let app = XCUIApplication()
app.launch()
}
@MainActor
func testLaunchPerformance() throws {
measure(metrics: [XCTApplicationLaunchMetric()]) {
XCUIApplication().launch()
}
}
}
#else
final class Frames_HoerspielUITests { }
#endif
However while this works when running the main app, it still fails in the UI tests. It is a SwiftUI only app. and I can't add the images to the asset catalog because they are referenced from another location.
Any ideas? Thank you
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AsyncStream { continuation in
Task {
let response = await getResponse()
continuation.yield(response)
continuation.finish()
}
}
In this WWDC video https://developer.apple.com/videos/play/wwdc2025/231/ at 8:20 the presenter mentions that if the "Task gets cancelled, the Task inside the function will automatically get cancelled too". The documentation does not mention anything like this.
From my own testing on iOS 18.5, this is not true.
Hello
I want to implement customisation to swift argumentparser, Here are following changes want to do it in my cli
changing default footer present in help command output
currently help command output coming like this
OVERVIEW: clisample
USAGE: clisample <subcommand>
OPTIONS:
--version show the version.
-h, --help show the help.
SUBCOMMANDS:
logs (default) Export logs for clisample processes.
See 'clisample --help' for more information.'
so instead of
See 'clisample --help' for more information.'
I want my own string
For more details, run 'clisample help <subcommand>'
customise error string getting from validation error
Error: Missing value for '-t <time>'
Help: -t <time> Time window (e.g. 10h, 30m, 2d).
Usage: clisample logs --time <time>
See 'clisample logs --help' for more information.
so I want error output with example and customised footer, like this
Error: Missing value for '-t <time>'
Help: -t <time> Time window (e.g. 10h, 30m, 2d).
Usage: clisample logs --time <time>
Example: clisample logs -t 5m
For more details, run 'clisample help <subcommand>'
Is this changes possible from anyway?
I am currently studying the Accelerate library by referring to Apple documentation.
Here is the link to the referenced document:
https://developer.apple.com/documentation/accelerate/veclib/vforce
When I executed the sample code provided at the bottom of the document, I found a case where the results were different.
let n = 10_000
let x = (0..<n).map { _ in
Float.random(in: 1 ... 10_000)
}
let y = x.map {
return sqrt($0)
}
and
let y = [Float](unsafeUninitializedCapacity: n) { buffer, initializedCount in
vForce.sqrt(x,
result: &buffer)
initializedCount = n
}
The code below is provided to observe the issue described above.
import Accelerate
Task {
let n = 1//10_000
let x = (0..<n).map { _ in
Float(6737.015)//Float.random(in: 1 ... 10_000)
}
let y = x.map {
return sqrt($0)
}
try? await Task.sleep(nanoseconds: 1_000_000_000)
let z = [Float](unsafeUninitializedCapacity: n) { buffer, initializedCount in
vForce.sqrt(x, result: &buffer)
initializedCount = n
}
}
For a value of 6737.015 when calculating the square root:
Using the sqrt(_:) function gives the result 82.07932,
While using the vForce.sqrt(_:result:) function gives the result 82.07933.
Using a calculator, the value comes out as 82.07932139, which shows that the result from vForce is incorrect.
Could you explain the reason behind this difference?
My company wants to be insure that if my Objective-C to Swift conversions fail in anyway, that the app can revert to using the older Objective-C code. By using a remotely controllable flag, the app can switch which code runs as, both are compiled into the app.
Essentially, I create a protocol that describes the original class, then both classes (with a "s" or "o" appended to them) conform to the protocol.
Protocol: Object
Objective-C class: oObject
Swift class: sObject
That said, I hit one issue that I just can't seem reason out. I create a Objective-C function that returns the appropriate class:
Class<Object> classObject(void) {
if (myFlag) {
return [sObject class];
} else {
return [oObject class];
}
}
Swift deals with this really well - I can create an initialized object using:
let object = classObject().init()
but I cannot find a way to do this in Objective-C:
Object *object = [[classSalesForceData() alloc] init];
fails with "No known class method for selector 'alloc'"
Is there a way to do this?
David
PS: my workaround is to return an allocated object:
Object *createObject(void) {
if (myFlag) {
return [sObject alloc];
} else {
return [oObject alloc];
}
}
Module compiled with Swift 6.0.3 cannot be imported by the Swift 6.1 compiler: /private/var/tmp/_bazel_xx/8b7c61ad484d9da1bf94a11f12ae6ffd/rules_xcodeproj.noindex/build_output_base/execroot/main/CustomModules/BIYThred/CocoaLumberjack/framework/CocoaLumberjack.framework/Modules/CocoaLumberjack.swiftmodule/arm64-apple-ios.swiftmodule
I'm having trouble dealing with concurrency with the SFAuthorizationPluginView. Does anybody know how this can be solved?
https://developer.apple.com/documentation/securityinterface/sfauthorizationpluginview
The crux of it is:
If I inherit an object as part of an API, and the API is preconcurrency, and thus is nonisolated (but in reality is @MainActor), how do I return a @MainActor GUI element?
https://developer.apple.com/documentation/securityinterface/sfauthorizationpluginview/firstresponder()
The longer story:
I made my view class inherit SFAuthorizationPluginView.
The API is preconcurrency (but not marked as preconcurrency)
I started using concurrency in my plugin to retrieve data over XPC. (https://developer.apple.com/documentation/xpc/xpcsession + https://developer.apple.com/documentation/swift/withcheckedthrowingcontinuation(isolation:function:_:))
Once I retrieve the data over XPC, I need to post it on GUI, hence I've set my view class as @MainActor in order to do the thread switch.
Swift compiler keeps complaining:
override func firstResponder() -> NSResponder? {
return usernameField
}
"Main actor-isolated property 'usernameField' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode"
override func firstResponder() -> NSResponder? {
MainActor.assumeIsolated {
return usernameField
}
}
"Sending 'self' risks causing data races; this is an error in the Swift 6 language mode"
I think fundamentally, the API is forcing me to give away a @MainActor variable through a nonisolated function, and there is no way to shut up the compiler.
I've tried @preconcurrency and it has no effect as far as I can tell. I've also tried marking the function explicitly as nonisolated.
The rest of the API are less problematic, but returning a GUI variable is exceptionally difficult.
Hello,
It is mentioned in CryptoTokenKit documentation:
You use the CryptoTokenKit framework to easily access cryptographic tokens. Tokens are physical devices built in to the system, located on attached hardware (like a smart card), or accessible through a network connection.
However, it looks like there is lack of documentation with simple example, how to access network token.
I have a certificates in HSM (hardware secure module), which is accessible on network, and I'd like to access certificates on HSM on my Mac.
Does anybody know, where to start with implementation?
Thank you.
Greetings! I am actively working on porting x64 code to Apple Silicon now that the time is nigh and part of the fundamentals of our software is a coroutine library for handling cooperative multitasking of GUI operations on the main thread. I was hoping to get the locations of the stack pointer and frame pointer in jmp_buf so, after setjmp() can redirect them to the primary handling routines in our coroutine library that handles the cooperative scheduling (which replaced and ported the old classic MP routines) which worked for PowerPC, i386 and x64.
Any thoughts on where in the jmp_buf these might be located? I didn't see anything in the XNU open source.
Any advice would be much obliged instead of having to dive in and re-implement these routines in assembly myself!
Topic:
Programming Languages
SubTopic:
General
As a fun project, I'm wanting to model an electronic circuit.
Components inherit from a superclass (ElectronicComponent). Each subclass (e.g. Resistor) has certain methods to return properties (e.g. resistance), but may vary by the number of outlets (leads) they have, and what they are named.
Each outlet connects to a Junction.
In my code to assemble a circuit, while I'm able to manually hook up the outlets to the junctions, I'd like to be able to use code similar to the following…
class Lead: Hashable // implementation omitted
{
let id = UUID()
unowned let component: ElectronicComponent
weak var connection: Junction?
init(component: ElectronicComponent, to connection: Junction? = nil)
{
self.component = component
self.connection = connection
}
}
@dynamicMemberLookup
class ElectronicComponent
{
let id = UUID()
var connections: Set<Lead> = []
let label: String?
init(label: String)
{
self.label = label
}
subscript<T>(dynamicMember keyPath: KeyPath<ElectronicComponent, T>) -> T
{
self[keyPath: keyPath]
}
func connect(lead: KeyPath<ElectronicComponent, Lead>, to junction: Junction)
{
let lead = self[keyPath: lead]
lead.connection = junction
connections.insert(lead)
}
}
class Resistor: ElectronicComponent
{
var input, output: Lead?
let resistance: Measurement<UnitElectricResistance>
init(_ label: String, resistance: Measurement<UnitElectricResistance>)
{
self.resistance = resistance
super.init(label: label)
}
}
let resistorA = Resistor("R1", resistance: .init(value: 100, unit: .ohms))
let junctionA = Junction(name: "A")
resistorA.connect(lead: \.outlet2, to: junctionA)
While I'm able to do this by implementing @dynamicMemberLookup in each subclass, I'd like to be able to do this in the superclass to save repeating the code.
subscript<T>(dynamicMember keyPath: KeyPath<ElectronicComponent, T>) -> T
{
self[keyPath: keyPath]
}
Unfortunately, the compiler is not allowing me to do this as the superclass doesn't know about the subclass properties, and at the call site, the subclass isn't seen as ElectronicComponent.
I've been doing trial and error with protocol conformance and other things, but hitting walls each time.
One possibility is replacing the set of outlets with a dictionary, and using Strings instead of key paths, but would prefer not to.
Another thing I haven't tried is creating and adopting a protocol with the method implemented in there. Another considered approach is using macros in the subclasses, but I'd like to see if there is a possibility of achieving the goal using my current approach, for learning as much as anything.
I want to build a Swift library package that uses modified build of OpenSSL and Curl.
I have already statically compiled both and verified I can use them in an Objective-C framework on my target platform (iOS & iOS Simulator). I'm using XCFramework files that contain the static library binaries and headers:
openssl.xcframework/
ios-arm64/
openssl.framework/
Headers/
[...]
openssl
ios-arm64_x86_64-simulator/
openssl.framework/
Headers/
[...]
openssl
Info.plist
I'm not sure how I'm supposed to set up my Swift package to import these libraries.
I can use .systemLibrary but that seems to use the embedded copies of libssl and libcurl on my system, and I can't figure out how to use the path: parameter to that.
I also tried using a .binaryTarget pointing to the XCFramework files, but that didn't seem to work as there is no module generated and I'm not sure how to make one myself.
At a basic high level, this is what I'm trying to accomplish:
where libcrypto & libssl come from the provided openssl.xcframework file, and libcurl from curl.xcframework
Hi Everyone,
I was able to create the String Catalog with all my strings getting automatic into the stringCatalog except the strings from my models where is not swiftUI and where all I have a class with a lot of info for my app.
Some classes are short and I was able to just make the strings localizable by adding on every line:
(String(localized: "Telefone"))
But I have one class which has Line: 1071 and Col: 1610 and every line I have 7 strings that needs to get localized. These 7 strings are repeated on every line.
So I was trying to create a localization for these 7 strings on this class without having to write (String(localized: "Telefone")) 7 times on every line.
is there a way?
Here is short version of my class:
import Foundation
class LensStructFilter: Identifiable {
var description: String
init(description: String) {
self.description = description
}
}
let lensEntriesFilter: [LensStructFilter] = [
LensStructFilter(description: "Focal: 24mm \nAbertura Máxima: F2.8 \nCobertura: FULL FRAME \nBocal: Nikon F \nFoco Mínimo: 0,30m \nDiâmetro Frontal: 52mm \nPeso: 275g \n\nFocal: 35mm \nAbertura Máxima: F2.0 \nCobertura: FULL FRAME \nBocal: Nikon F \nFoco Mínimo: 0,25m \nDiâmetro Frontal: 52mm \nPeso: 205g \n\nFocal: 50mm \nAbertura Máxima: F1.8 \nCobertura: FULL FRAME \nBocal: Nikon F \nFoco Mínimo: 0,45m \nDiâmetro Frontal: 52mm \nPeso: 185g \n\nFocal: 85mm \nAbertura Máxima: F1.8 \nCobertura: FULL FRAME \nBocal: Nikon F \nFoco Mínimo: 0,80m \nDiâmetro Frontal: 67mm \nPeso: 350g \n\nFocal: 105mm MACRO \nAbertura Máxima: F2.8 \nCobertura: FULL FRAME \nBocal: Nikon F \nFoco Mínimo: 0,31m \nDiâmetro Frontal: 62mm \nPeso: 720g"),
LensStructFilter(description: "Focal: 16-35mm \nAbertura Máxima: F2.8 \nCobertura: FULL FRAME \nBocal: EF \nFoco Mínimo: 0,28m \nDiâmetro Frontal (rosca): 82mm \nPeso: 790Kg"),
Thanks
We developing Native App with C++17 for iOS. We override global new and delete operators. This App deallocate all allocated memories correctly by Run on Xcode (Command + R), but exception occurs launch from xcrun or App icon on iPhone.
I debugged the exception. Overriding new operation was called correctly, but overriding delete operation was not called. The default delete was called. I'm not sure why is that.
STEPS TO REPRODUCE
Build xcode project.
Run "xcrun devicectl device install app --device "
Run "xcrun devicectl device process launch --console --device "
PLATFORM AND VERSION
iOS
Development environment: Xcode 16.4, macOS macOS Sequoia 15.5
Run-time configuration: iOS 18.5
main.cpp I attached is sample code to reproduce this problem.
main.cpp
Topic:
Programming Languages
SubTopic:
General
Greetings,
func stepForward(_ input: Int) -> Int {
return input + 1
}
func stepBackward(_ input: Int) -> Int {
return input - 1
}
func chooseStepFunction(backward: Bool) -> (Int) -> Int {
return backward ? stepBackward : stepForward /* Error
type of expression is ambiguous without a type annotation */
}
Why am I getting this error. If I change the function to
func chooseStepFunction(backward: Bool) -> (Int) -> Int {
if backward {
return stepBackward
else {
return stepForward
}
}
Why is the previous chooseStepFunction giving me an error ?
Thx in advance
Hi,
I am exploring Closures and trying to understand how they works. Closure have a special key feature that they can capture the context of the variables/constants from surroundings, once captured we can still use them inside the closure even if the scope in which they are defined does not exist.
I want to understand the lifecycle of captured variable/constant i.e., where are these captured variables stored and when these get created and destroyed.
How is memory managed for captured variables or constants in a closure, depending on whether they are value types or reference types?
Topic:
Programming Languages
SubTopic:
Swift
Hello,
While watching WWDC25: Code-along: Elevate an app with Swift concurrency at timestamp 25:48, I noticed something in the slide/diagram that might be incorrect.
The diagram shows ExtractSticker twice, but based on the code context and spoken explanation, I think it was meant to be ExtractSticker and ExtractColor.
Reasoning:
The surrounding code and narration describe the use of async let and a Sendable Data object.
From the flow, one task extracts a sticker while the other extracts a color, so it seems like the diagram is inconsistent.
I do understand that with @concurrent, having two ExtractSticker operations on the same Data is technically possible (with two concurrent process executing their respective ExtractSticker) — but that would be a different meaning than what the talk was describing.
Since concurrency is already a subtle and error-prone topic, I thought it was worth pointing this out. If I’m mistaken, I’d love clarification. Otherwise, this could be a small correction to keep things aligned and clearer for everyone.
Minor point overall, but Swift 6’s concurrency model is doing a fantastic job at helping us write safer code—so thank you to the team for that!
(Attaching screenshots for reference)
I have a transformation function that takes in data, executes some instructions, and returns an output. This function is dynamic and not shipped with the binary. Currently, I’m executing it using JavaScriptCore.JSContext, which works well, but the function itself is written in JavaScript.
Is there a way to achieve something similar using Swift – such as executing a dynamic Swift script, either directly or through other means? I know this is possible on macOS, but I’m not sure about iOS. I’ve also heard that extensions might open up some possibilities here. Any insights or alternative approaches would be appreciated.
I filed the following issue on swiftlang/swift on GitHub (Aug 8th), and a followup the swift.org forums, but not getting any replies. As we near the release of Swift 6.2, I want to know if what I'm seeing below is expected, or if it's another case where the compiler needs a fix.
protocol P1: Equatable { }
struct S1: P1 { }
// Error: Conformance of 'S1' to protocol 'P1' crosses into main actor-isolated code an can cause data races
struct S1Workaround: @MainActor P1 { } // OK
// Another potential workaround if `Equatable` conformance can be moved to the conforming type.
protocol P2 { }
struct S2: Equatable, P2 { } // OK
There was a prior compiler bug fix which addressed inhereted protocols regarding @MainActor. For Equatable, one still has to use @MainActoreven when the default actor isolation is MainActor.
Also affects Hashable and any other protocol inheriting from Equatable.
I came across a code
let myFruitBasket = ["apple":"red", "banana": "yellow", "budbeeri": "dark voilet", "chikoo": "brown"]
Can we have range for keys and values of dictionary, it will be convenient
for keys
print(myFruitBasket.keys[1...3])
// banana, budbeeri, chikoo
same for values
print(myFruitsBasket.values[1...3])
// yellow, voilet, brown
I noticed that when I enter the fully immersive view and then click the X button below the window, the immersive space remains active, and the only way to dismiss it is to click the digital crown. On other apps (Disney+ for example), closing out of the main window while in immersive mode also closes out the immersive space. I tried applying an onDisappear modifier to the the Modules view with a dismissImmersiveSpace, but that doesn't appear to do anything.
Any help would be appreciated.