I want a solution to keep tracking the user once he started in driving state until parking.
I tried many solutions like use significant location changes, and silent push notifications and background tasks, but no one of them worked as expected.
I need when user started in driving the app be active until the user parked his car.
I'm using CoreMotion and CoreLocation.
The challenge is when the app is not active like killed or suspended.
So, how to do this? is this possible or not?
Dive into the world of programming languages used for app development.
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Is the title possible ? I tried [[thread valueForKey:@"_private"] valueForKey:@"tid"] but the tid was not kvc compliant. private apis are alright because this is just for testing remote process thread creation. I already have a working method but it has hardcoded assembly so you can't do anything else.
this question is mainly for Quinn (figured he may know something about this)
Hello,
I have a test variable here which works fine:
var quotes: [(quote: String, order: Int)] = [
("I live you the more ...", 1),
("There is nothing permanent ...", 2),
("You cannot shake hands ...", 3),
("Lord, make me an instrument...", 4)
]
and I have a test function which successfully pulls data from a mysql database via a web service and displays it via the "print" function:
func getPrice(){
if let url = URL(string:"https://www.TEST.com/test_connection.php"){
URLSession.shared.dataTask(with: url) { (data, response, error) in
if let data = data{
if let json = try? JSONDecoder().decode([[String:String]].self, from: data){
json.forEach { row in
print(row["quote"]!)
print(row["order"]!)
}
}
else{
}
}
else{
print("wrong :-(")
}
}.resume()
}
}
Please can you tell me how to re-write the quotes variable/array so that it returns the results that are found in the getPrice() function?
I'm experiencing a persistent issue with CloudKit sharing in my iOS application. When attempting to present a UICloudSharingController, I receive the error message "Unknown client: ChoreOrganizer" in the console.
App Configuration Details:
App Name: ChoreOrganizer
Bundle ID: com.ProgressByBits.ChoreOrganizer
CloudKit Container ID: iCloud.com.ProgressByBits.ChoreOrganizer
Core Data Model Name: ChoreOrganizer.xcdatamodeld
Core Data Entity: Chore
Error Details:
The error "Unknown client: ChoreOrganizer" occurs when I present the UICloudSharingController
This happens only on the first attempt to share; subsequent attempts during the same app session don't show the error but sharing still doesn't work
All my code executes successfully without errors until UICloudSharingController is presented
Implementation Details:
I'm using NSPersistentCloudKitContainer for Core Data synchronization and UICloudSharingController for sharing. My implementation creates a custom CloudKit zone, saves both a record and a CKShare in that zone, and then presents the sharing controller.
Here's the relevant code:
@MainActor
func presentSharing(from viewController: UIViewController) async throws {
// Create CloudKit container
let container = CKContainer(identifier: containerIdentifier)
let database = container.privateCloudDatabase
// Define custom zone ID
let zoneID = CKRecordZone.ID(zoneName: "SharedChores", ownerName: CKCurrentUserDefaultName)
do {
// Check if zone exists, create if necessary
do {
_ = try await database.recordZone(for: zoneID)
} catch {
let newZone = CKRecordZone(zoneID: zoneID)
_ = try await database.save(newZone)
}
// Create record in custom zone
let recordID = CKRecord.ID(recordName: "SharedChoresRoot", zoneID: zoneID)
let rootRecord = CKRecord(recordType: "ChoreRoot", recordID: recordID)
rootRecord["name"] = "Shared Chores Root" as CKRecordValue
// Create share
let share = CKShare(rootRecord: rootRecord)
share[CKShare.SystemFieldKey.title] = "Shared Tasks" as CKRecordValue
// Save both record and share in same operation
let recordsToSave: [CKRecord] = [rootRecord, share]
_ = try await database.modifyRecords(saving: recordsToSave, deleting: [])
// Present sharing controller
let sharingController = UICloudSharingController(share: share, container: container)
sharingController.delegate = shareDelegate
// Configure popover
if let popover = sharingController.popoverPresentationController {
popover.sourceView = viewController.view
popover.sourceRect = CGRect(
x: viewController.view.bounds.midX,
y: viewController.view.bounds.midY,
width: 1, height: 1
)
popover.permittedArrowDirections = []
}
viewController.present(sharingController, animated: true)
} catch {
throw error
}
}
Steps I've already tried:
Verified correct bundle ID and container ID match in all places (code, entitlements file, Developer Portal)
Added NSUbiquitousContainers configuration to Info.plist
Ensured proper entitlements in the app
Created and configured proper provisioning profiles
Tried both default zone and custom zone for sharing
Various ways of saving the record and share (separate operations, same operation)
Cleaned build folder, deleted derived data, reinstalled the app
Tried on both simulator and physical device
Confirmed CloudKit container exists in CloudKit Dashboard with correct schema
Verified iCloud is properly signed in on test devices
Console Output:
1. Starting sharing process
2. Created CKContainer with ID: iCloud.com.ProgressByBits.ChoreOrganizer
3. Using zone: SharedChores
4. Checking if zone exists
5. Zone exists
7. Created record with ID: <CKRecordID: 0x3033ebd80; recordName=SharedChoresRoot, zoneID=SharedChores:__defaultOwner__>
8. Created share with ID: <CKRecordID: 0x3033ea920; recordName=Share-C4701F43-7591-4436-BBF4-6FA8AF3DF532, zoneID=SharedChores:__defaultOwner__>
9. About to save record and share
10. Records saved successfully
11. Creating UICloudSharingController
12. About to present UICloudSharingController
13. UICloudSharingController presented
Unknown client: ChoreOrganizer
Additional Information:
When accessing the CloudKit Dashboard, I can see that data is being properly synced to the cloud, indicating that the basic CloudKit integration is working. The issue appears to be specific to the sharing functionality.
I would greatly appreciate any insights or solutions to resolve this persistent "Unknown client" error. Thank you for your assistance.
public static func fetch(in context: NSManagedObjectContext, configurationBlock: (NSFetchRequest) -> () = { _ in }) -> [Self] {
let request = NSFetchRequest(entityName: Self.entityName)
configurationBlock(request)
return try! context.fetch(request)
}
context.fetch(request), 'fetch' function has error. Thread 24: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
NSPredicate(format: "SELF MATCHES %@", "^[0-9A-Z]+$").evaluate(with: "126𝒥ℰℬℬ𝒢𝒦𝒮33")
Returns true, and I don't know why. 𝒥ℰℬℬ𝒢𝒦𝒮 is not between 0-9 and A-Z, and why it returns true? How to avoid similar problem like this when using NSPredicate?
I have configured DateFormatter in the following way:
let df = DateFormatter()
df.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"
df.locale = .init(identifier: "en")
df.timeZone = .init(secondsFromGMT: 0)
in some user devices instead of ISO8601 style it returns date like 09/25/2024 12:00:34
Tried to change date format from settings, changed calendar and I think that checked everything that can cause the problem, but nothing helped to reproduce this issue, but actually this issue exists and consumers complain about not working date picker.
Is there any information what can cause such problem? May be there is some bug in iOS itself?
I found a similar problem here https://developer.apple.com/forums/thread/764777 and I could solve my problem by wrapping the call to requestAutomaticPassPresentationSuppression in a call to DispatchQueue.global().async.
But my question is if this is really how things should work. Even with strict concurrency warnings in Swift 6 I don't get any warnings. Just a runtime crash.
How are we supposed to find these problems? Couldn't the compiler assist with a warning/error.
Why does the compiler make the assumptions it does about the method that is declared like this:
@available(iOS 9.0, *)
open class func requestAutomaticPassPresentationSuppression(responseHandler: @escaping (PKAutomaticPassPresentationSuppressionResult) -> Void) -> PKSuppressionRequestToken
Now that we have migrated to Swift 6 our code base contains a bunch of unknown places where it will crash as above.
After ther Mac application is launched:
Log error: CGSWindowShmemCreateWithPort failed on port 0
and when the application quit:
No error handler for XPC error: Connection invalid
Appear with Xcode 15.4 but not with 12.4
As repported by Steve4442 in "Can someone explain this message" https://Forums.Developer.Apple.com/Forums/Thread/727803
.
The code don't use "windowNumbersWithOptions"
Can I ignore this log message ?
❌ Could not find email_ai.py in the app bundle. Available files: []
The error above is what I’m encountering.
I’ve placed the referenced file both in the project directory and inside the app. However, every time I remove and reinsert the file into the folder within the app, it prompts me to designate the targets—I select all, but this doesn’t resolve the issue.
I’m unsure how to properly reference the file so that it is recognised and included in the bundle. Any guidance would be greatly appreciated.
this is my build phase:
#!/bin/sh
set -x # Prints each command before running it (for debugging)
pwd # Shows the current working directory
echo "$SRCROOT" # Shows what Xcode thinks is the project root
ls -l "$SRCROOT/EmailAssistant/EmailAssistant/PythonScripts" # Lists files in the script folder
export PYTHONPATH="/Users/caesar/.pyenv/versions/3.11.6/bin"
/Users/caesar/.pyenv/versions/3.11.6/bin/python3 "$SRCROOT/EmailAssistant/EmailAssistant/PythonScripts/email_ai.py"
echo "Script completed."
For my app I've created a Dictionary that I want to persist using AppStorage
In order to be able to do this, I added RawRepresentable conformance for my specific type of Dictionary. (see code below)
typealias ScriptPickers = [Language: Bool]
extension ScriptPickers: @retroactive RawRepresentable where Key == Language, Value == Bool {
public init?(rawValue: String) {
guard let data = rawValue.data(using: .utf8),
let result = try? JSONDecoder().decode(ScriptPickers.self, from: data)
else {
return nil
}
self = result
}
public var rawValue: String {
guard let data = try? JSONEncoder().encode(self), // data is Data type
let result = String(data: data, encoding: .utf8) // coerce NSData to String
else {
return "{}" // empty Dictionary represented as String
}
return result
}
}
public enum Language: String, Codable, {
case en = "en"
case fr = "fr"
case ja = "ja"
case ko = "ko"
case hr = "hr"
case de = "de"
}
This all works fine in my app, however trying to run any tests, the build fails with the following:
Conflicting conformance of 'Dictionary<Key, Value>' to protocol 'RawRepresentable'; there cannot be more than one conformance, even with different conditional bounds
But then when I comment out my RawRepresentable implementation, I get the following error when attempting to run tests:
Value of type 'ScriptPickers' (aka 'Dictionary<Language, Bool>') has no member 'rawValue'
I hope Joseph Heller is out there somewhere chuckling at my predicament
any/all ideas greatly appreciated
I notice that Swift Data type's hashValue collision when first 80 byte of data and data length are same because of the Implementation only use first 80 bytes to compute the hash.
https://web.archive.org/web/20120605052030/https://opensource.apple.com/source/CF/CF-635.21/CFData.c
also, even if hash collision on the situation like this, I can check data is really equal or not by ==
does there any reason for this implementation(only use 80 byte of data to make hashValue)?
test code is under below
let dataArray: [UInt8] = [
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
]
var dataArray1: [UInt8] = dataArray
var dataArray2: [UInt8] = dataArray
dataArray1.append(contentsOf: [0x00, 0x00, 0x00, 0x00])
dataArray2.append(contentsOf: [0xff, 0xff, 0xff, 0xff])
let data1 = Data(dataArray1)
let data2 = Data(dataArray2) // Only last 4 byte differs
print(data1.hashValue)
print(data2.hashValue)
print(data1.hashValue == data2.hashValue) // true
print(data1 == data2) // false
Hi the below array and code to output a list item works fine:
var quotes = [
[
"quote": "I live you the more ...",
"order": "1"
],
[
"quote": "There is nothing permanent ...",
"order": "2"
],
[
"quote": "You cannot shake hands ...",
"order": "3"
],
[
"quote": "Lord, make me an instrument...",
"order": "4"
]
]
cell.textLabel?.text = quotes[indexPath.row]["quote"]
However if I change the "order" values to be numbers rather than text like below then for the above line I get an error message in Xcode "No exact matches in call to subscript". Please could someone tell me how to make it work with the numbers stored as numbers? (I'm wondering if creating an any array type and using the .text function has caused a conflict but I can't find how to resolve)
[
"quote": "I live you the more ...",
"order": 1
],
[
"quote": "There is nothing permanent ...",
"order": 2
],
[
"quote": "You cannot shake hands ...",
"order": 3
],
[
"quote": "Lord, make me an instrument...",
"order": 4
]
]
Thank you for any pointers :-)
The following code works when compiling for macOS:
print(NSMutableDictionary().isEqual(to: NSMutableDictionary()))
but produces a compiler error when compiling for iOS:
'NSMutableDictionary' is not convertible to '[AnyHashable : Any]'
NSDictionary.isEqual(to:) has the same signature on macOS and iOS. Why does this happen? Can I use NSDictionary.isEqual(_:) instead?
I am encountering a strange issue. I have a class that manages a selection of generic items T in an Array. It's a work in progress, but I'l try to give a gist of the setup.
class FileManagerItemModel: NSObject, Identifiable, Codable, NSCopying, Transferable, NSItemProviderReading, NSItemProviderWriting {
var id: URL
static func == (lhs: FileManagerItemModel, rhs: FileManagerItemModel) -> Bool {
lhs.fileURL == rhs.fileURL
}
var fileURL: URL {
FileManagerItemModel.normalizedFileURL(type: type,
rootURL: rootURL,
filePath: filePath)
}
init(type: FileManagerItemType, rootURL: URL, fileURL: URL) {
self.type = type
self.rootURL = rootURL
self.filePath = FileManagerItemModel.filePathRelativeToRootURL(fileURL: fileURL, rootURL: rootURL) ?? "[unknown]"
self.id = FileManagerItemModel.normalizedFileURL(type: type,
rootURL: rootURL,
filePath: filePath)
}
}
The class that manages the selection of these FileManagerItemModels is like so:
@Observable
class MultiSelectDragDropCoordinator<T: Hashable>: ObservableObject, CustomDebugStringConvertible {
private(set) var multiSelectedItems: [T] = []
func addToSelection(_ item: T) {
if !multiSelectedItems.contains(where: { $0 == item }) {
multiSelectedItems.append(item)
}
}
...
}
My issue is that the check if !multiSelectedItems.contains(where: { $0 == item }) in func addToSelection fails. The if is always executed, even if multiSelectedItems contains the given item.
Now, my first thought would be to suspect the static func == check. But that check works fine and does what it should do. Equality is defined by the whole fileURL.
So, the if should have worked. And If I put a breakpoint in func addToSelection on the if, and type po multiSelectedItems.contains(where: { $0 == item }) in the debug console, it actually returns true if the item is in multiSelectedItems. And it properly return false if the item is not in multiSelectedItems.
Still, if I then continue stepping through the app after the breakpoint was hit and I confirmed that the contains should return true, the app still goes into the if, and adds a duplicate item.
I tried assigning to a variable, I tried using a function and returning the true/false. Nothing helps.
Does anyone have an idea on why the debugger shows one (the correct and expected) thing but the actual code still does something different?
Does anyone know if there will be a Swift 6 version of "The Swift Programming Language" book and if so, when it will be released for Apple Books?
Hi I'm new here - I'm trying to learn Swift and SwiftUI.
Tried on PluralSight and Udemy but they have been outdated and thus hard to follow.
So after finding Apples own guides I felt relieved and happy, but now I'm stuck again.
After they've updated Xcode to use #Preview instead of PreviewProvider it's hard to follow along on their tutorial.
Does anyone know of good resources to study SwiftUI? Or know if apple plan to update their tutorials any time soon?
I'm here now if anyone's interested or it's useful information: https://developer.apple.com/tutorials/app-dev-training/managing-state-and-life-cycle
Hello everyone,
There is one thing about Objective-C's memory management that confuses me, which is a returned object's lifetime from methods with names doesn't start with "alloc", "new", "copy", or "mutableCopy".
Take this as an example, when using NSBitmapImageRep's representationUsingType:properties: method, it returns an NSData object (reference: https://developer.apple.com/documentation/appkit/nsbitmapimagerep/representation(using:properties:)?language=objc).
While testing this out, the NSData seemed to be an owned object (it doesn't get released until the end of the program).
From what I understand, this may be an auto-released object which is released at the end of an autorelease pool block.
Could someone explain this in more detail? What if I want to release that NSData object before the end of the autorelease pool block? How can I know which object is autoreleased, borrowed, or owned?
I've created a Julia interface for Apple Accelerate's libSparse, via calling the library functions as if they were C (@ccall). I'm interested in using this in the context of power systems, where the sparse matrix is the Jacobian or the ABA matrix from a sparse grid network. However, I'm puzzled by the performance.
I ran a sampling profiler on repeated in-place solves of Ax = b for a large sparse matrix A and random dense vectors b. (A is size 30k, positive definite so Cholesky factorization.) The 2 functions with the largest impact are _SparseConvertFromCoordinate_Double from libSparse.dylib, and BLASStateRelease from libBLAS.dylib. That strikes me as bizarre. This is an in-place solve: there should be minimal overheard from allocating/deallocating memory. Also, it seems strange that the library would repeatedly convert from coordinate form. Is this expected behavior?
Thinking it might be an artifact of the Julia-C interface, I wrote up a similar program in C/Objective-C. I didn't profile it, but timing the same operation (repeated in-place solves of Ax = b for random vectors b, with the same matrix A as in the Julia) gave the same duration. I've attached the C/Objective-C below.profiling-comparison.m.txt
If you're familiar with Julia, the following will give you the matrix I was working with:
using PowerSystems, PowerNetworkMatrices
sys = System("pglib_opf_case30000_goc.m")
A = PowerNetworkMatrices.ABA_Matrix(sys).data
where you can find the .m file here. (As a crude way to transfer A from Julia to C, I wrote the 3 arrays A.nzval, A.colptr, and A.rowval to .txt files as space-separated lists of numbers: the above C/objective-C reads in those files.) To duplicate my Julia profiling, do pkg> add AppleAccelerate#libSparse Profile--note the #libSparse part, these features aren't on the main branch--then run
using AppleAccelerate, Profile
# run previous code snippet to define A
M, N = 10000, size(A)[1]
bs = [rand(N) for _ in 1:M]
aa_fact = AAFactorization(A)
factor!(aa_fact)
solve!(aa_fact, bs[1]) # pre-compile before we profile.
Profile.init(n = 10^6, delay = 0.0003)
@profile (for i in 1:M; solve!(aa_fact, bs[i]); end;)
Profile.print(C = true, format = :flat, sortedby = :count)
decidePolicyFor delegate method:
import WebKit
@objc extension DocumentationVC
{
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void)
Being called just alright in swift 5 minimal concurrency.
Raising concurrency to complete with swift 5 or swift 6. Changing the code to avoid warnings:
@preconcurrency import WebKit
@objc extension DocumentationVC
{
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
The delegate method is not being called. Changing back to swift 5 concurrency minimal - it is called.
Looking at WKNavigationDelegate:
WK_SWIFT_UI_ACTOR
@protocol WKNavigationDelegate <NSObject>
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(WK_SWIFT_UI_ACTOR void (^)(WKNavigationActionPolicy))decisionHandler WK_SWIFT_ASYNC(3);
Changing the delegate method to:
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping @MainActor (WKNavigationActionPolicy) -> Void) {
And it is called across swift 5 concurrency minimal to complete to swift 6.
I thought, the meaning of @preconcurrency import WebKit was to keep the delegate without @MainActor before the (WKNavigationActionPolicy) still matching regardless the swift concurrency mode?
My point is - this can introduce hidden breaking changes? I didn't see this documented anyhow at: https://www.swift.org/migration/documentation/migrationguide/.
decidePolicyFor is an optional method - so if signature 'mismatches' - there will be no warning on not-implementing the delegate method.
How do we catch or diagnose irregularities like this? Is it something @preconcurrency import WebKit should be ensuring and it is not?
Is this delegate mismatch a bug on swift side or something we should be taking care of while migrating? If it is on us, how do we diagnose these potential mismatches?