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Delve into the world of built-in app and system services available to developers. Discuss leveraging these services to enhance your app's functionality and user experience.
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I'm currently experimenting with the latest Xcode beta 15.3 (15E5194e) and attempting to integrate FinanceKit](https://developer.apple.com/documentation/financekit) into my project. However, I've encountered a persistent issue where the app crashes upon attempting to read or request authorization, accompanied by the following error message:
FinanceKit/FinanceStore+FinancialDataAuthorization.swift:52: Fatal error: Process is not entitled
Upon investigation, I've found no evident entitlements for FinanceKit, despite exploring options like Apple Wallet. Furthermore, I thoroughly examined the info.plist for relevant privacy values but found nothing pertinent.
Here's the code snippet that triggers the fatal error, whether it's the request or read function:
I don't see anything in entitlements for FinanceKit (I tried Apple Wallet and that didn't make a difference). Additionally, I checked for relevant privacy values for the info.plist but again didn't see anything relevant.
Here is the code to reproduce the error (note calling either function will result in the same fatal error):
import FinanceKit
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
requestFinancePermission()
// readFinancePermission()
}
private func requestFinancePermission() {
Task {
do {
let status = try await FinanceStore.shared.requestAuthorization()
} catch {
print("Error: \(error)")
}
}
}
private func readFinancePermission() {
Task {
do {
let status = try await FinanceStore.shared.authorizationStatus()
} catch {
print("Error: \(error)")
}
}
}
}
I'm seeking clarification on whether FinanceKit is currently usable or if there are additional steps needed for proper integration. Any insights or suggestions would be greatly appreciated. Thank you!
I just noticed something really odd with WeatherKit.
If the temperate at midnight of the FOLLOWING day is colder than all temps in the day you want weather for then WeatherKit will report that as the low temperature for the day even though it's a different day.
Here it's reporting the lowest temp for Feb 6 is 22F. But that's a temp from Feb 7. I'm displaying lowTemperature and lowTemperatureTime from DayWeather as well as the HourWeather in these examples.
I wasn't sure if this was working as designed or a bug. I can provide raw data from this example.
----daily formatted start
weather for Feb 6
High 41°
high at Feb 6 at 2 PM
Low 22°
low at Feb 7 at 12 AM
----daily formatted end
Feb 6 at 12 AM 34°
Feb 6 at 1 AM 35°
Feb 6 at 2 AM 36°
Feb 6 at 3 AM 36°
Feb 6 at 4 AM 36°
Feb 6 at 5 AM 34°
Feb 6 at 6 AM 33°
Feb 6 at 7 AM 33°
Feb 6 at 8 AM 33°
Feb 6 at 9 AM 33°
Feb 6 at 10 AM 35°
Feb 6 at 11 AM 36°
Feb 6 at 12 PM 38°
Feb 6 at 1 PM 40°
Feb 6 at 2 PM 41°
Feb 6 at 3 PM 40°
Feb 6 at 4 PM 39°
Feb 6 at 5 PM 37°
Feb 6 at 6 PM 36°
Feb 6 at 7 PM 33°
Feb 6 at 8 PM 31°
Feb 6 at 9 PM 29°
Feb 6 at 10 PM 27°
Feb 6 at 11 PM 24°
Feb 7 at 12 AM 22°
Hi there,
I’m currently working on an app designed for doctors to respond to life-threatening situations in hospitals. The goal is for critical alerts to trigger an alarm, regardless of whether the app is in the foreground or background. The critical alerts entitlement is already set up, but there’s a limitation: I can only attach a 30-second audio file to the notification, as I can’t run code to loop the sound when the app is swiped away.
Does anyone have suggestions on how I might approach this problem?
Thanks so much in advance!
Topic:
App & System Services
SubTopic:
Notifications
I’m facing an issue with iOS that I hope someone can help with. I developed an app a few years ago that records GPS tracks. Up until recently, everything worked fine—even when the app was running in the background, the recording continued without problems.
However, since releasing an update compiled after the iOS 18 release, users have reported that background tracking no longer works. I’ve reviewed the iOS documentation but haven’t found any relevant changes or solutions. Before the newly compiled release the app was working well on iOS 18 devices as well.
Some users have reported that switching to the location permission from "When Using the App" to "Always" solved the issue. This is not the case for all users.
Has anyone else encountered this issue? Any recommendations or insights on how to resolve it would be greatly appreciated.
Below you can see the code used for the location tracking. Before the issue happened the app was compiled with XCode 15.4. Now I am using XCode 16.2
locationManager.activityType = CLActivityType.fitness
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = 3
locationManager.allowsBackgroundLocationUpdates = true
locationManager.pausesLocationUpdatesAutomatically = false
if #available(iOS 11.0, *) {
locationManager.showsBackgroundLocationIndicator = true
}
locationManager.startUpdatingLocation()
if #available(iOS 17.0, *) {
// Create a CLBackgroundActivitySession object
backgroundActivitySession = CLBackgroundActivitySession()
}
Thanks in advance for your help!
Topic:
App & System Services
SubTopic:
Maps & Location
Tags:
Core Location
Maps and Location
Background Tasks
Hello. My newly released app includes a 1 day free trial. I've done this by creating a non-consumable in-app purchase priced at 0. I consider the free trial active if there's a transaction (from Transaction.currentEntitlements) for that product such that transaction.originalPurchaseDate is less than 24 hours ago. This works fine locally in the simulator and also in TestFlight, however it does not seem to work in the actual app from the App Store. The user can "purchase" it fine; they see the purchase sheet with the product name and the $0.00 price, and when they double press the side button it all seems to work. However, the app then behaves as if it didn't work. The free trial product is no longer available though.
One thing is that I didn't follow the naming convention “XX-day Trial”. Could that be the problem? If so, is that meant to be for the product reference name?
Topic:
App & System Services
SubTopic:
StoreKit
Hi all, I'm trying to write a little utility app that can detect when my bluetooth mouse is connected and turn natural scrolling off. I started by creating a Swift Package with swift package init --type excecutable and then wrote the following code in main.swift:
import CoreHID
let manager = HIDDeviceManager()
let notifications = await manager.monitorNotifications(
matchingCriteria: [.init(primaryUsage: .genericDesktop(.mouse))]
)
for try await notification in notifications {
switch notification {
case .deviceMatched(let device):
print("Matched:", device.deviceID)
let client = HIDDeviceClient(deviceReference: device)
print(await client?.manufacturer ?? "Unknown")
case .deviceRemoved(let device):
print("Removed:", device.description)
let client = HIDDeviceClient(deviceReference: device)
print(await client?.manufacturer ?? "Unknown")
@unknown default:
print("Unknown: \(notification)")
}
}
This program successfully detects my bluetooth mouse and correctly prints "Logitech", but when it gets to a second device, it crashes with the error message I put in the title: EXC_BREAKPOINT (code=1, subcode=0x1f9e0e13c).
If I run the program without my bluetooth mouse connected, it just crashes immediately so I can only assume this second device is the trackpad.
I added some log statements in addition to the prints so I could check unified logging in Console but nothing really stood out. No code signing errors, no permission denials, nada.
My environment:
MacBook Air 13-inch, M3, 2024
MacOS 15.1 (24B83)
Xcode Version 16.0 (16A242d)
swift-tools-version: 6.0
$ swift --version
swift-driver version: 1.115 Apple Swift version 6.0 (swiftlang-6.0.0.9.10 clang-1600.0.26.2)
Target: arm64-apple-macosx15.0
Has anyone seen this before or have ideas on how to investigate further?
Topic:
App & System Services
SubTopic:
Core OS
Hello, we have noticed a crash in BigSur 11.7.10, 20G1427 libdispatch:
Crashed Thread: 1 Dispatch queue: com.apple.network.connections
Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Illegal instruction: 4
Termination Reason: Namespace SIGNAL, Code 0x4
Terminating Process: exc handler [94088]
Application Specific Information:
BUG IN CLIENT OF LIBDISPATCH: Release of a suspended object
Thread 0:
0 libsystem_kernel.dylib 0x00007fff20488aea __sigsuspend_nocancel + 10
1 libdispatch.dylib 0x00007fff2031f4e1 _dispatch_sigsuspend + 36
2 libdispatch.dylib 0x00007fff2031f4bd _dispatch_sig_thread + 53
Thread 1 Crashed:: Dispatch queue: com.apple.network.connections
0 libdispatch.dylib 0x00007fff2033cc35 _dispatch_queue_xref_dispose.cold.1 + 24
1 libdispatch.dylib 0x00007fff20313808 _dispatch_queue_xref_dispose + 50
2 libdispatch.dylib 0x00007fff2030e2eb -[OS_dispatch_source _xref_dispose] + 17
3 libnetwork.dylib 0x00007fff24255999 __nw_queue_context_create_source_block_invoke + 41
4 libdispatch.dylib 0x00007fff2030d623 _dispatch_call_block_and_release + 12
5 libdispatch.dylib 0x00007fff2030e806 _dispatch_client_callout + 8
6 libdispatch.dylib 0x00007fff203111b0 _dispatch_continuation_pop + 423
7 libdispatch.dylib 0x00007fff203211f4 _dispatch_source_invoke + 1181
8 libdispatch.dylib 0x00007fff20316318 _dispatch_workloop_invoke + 1784
9 libdispatch.dylib 0x00007fff2031ec0d _dispatch_workloop_worker_thread + 811
10 libsystem_pthread.dylib 0x00007fff204b545d _pthread_wqthread + 314
11 libsystem_pthread.dylib 0x00007fff204b442f start_wqthread + 15
I have seen similar crashes in the forum, but none from com.apple.network.connections queue.
Should we raise a ticket or is this something that was fixed in newer OS versions?
Thanks!
Jakub
I'm developing a watchOS app for Watch Ultra 2 that implements water detection using CMSubmersionManager.
I would like to make it appear in the Auto-Launch settings menu, but my app is not appearing in the settings (Settings > General > Auto-Launch > When Submerged > Selected App)....
What additional steps should I take to make this work?
Environment
Device: Watch Ultra 2
watchOS: 11.2
Xcode: 16.0
Implementation
I have implemented the following as per documentation:
Added the Shallow Depth and Pressure capability and Entitlement.
Added the "Shallow Depth and Pressure" capability
Confirmed entitlement "com.apple.developer.submerged-shallow-depth-and-pressure" was automatically added
Note: I initially thought I should use "com.apple.developer.submerged-depth-and-pressure" (without "-shallow") since I'm targeting a maximum depth of 6 meters, but this resulted in compilation errors.
ref: https://developer.apple.com/forums/thread/740083
ref: https://developer.apple.com/forums/thread/735296
Added NSMotionUsageDescription and WKBackgroundModes
<key>NSMotionUsageDescription</key>
<string>Required for water detection</string>
<key>WKBackgroundModes</key>
<array>
<string>underwater-depth</string>
</array>
According to the documentation:
"It also adds your app to the list of apps that the system can autolaunch when the wearer submerges the watch."
What additional steps are needed to make the app appear in Auto-Launch settings? Has anyone successfully implemented this feature?
This is the functionality I am trying to achieve with libxpc:
There's one xpc server and two xpc clients. When the xpc server receives a particular dictionary item from clientB, the server needs to send a response to both clientA and clientB.
This is the approach I am currently using:
First, clientA creates a dictionary item that indicates that this item is from clientA. Now, clientA sends this dictionary to server. When server receives this item, it stores the connection instance with clientA in a global variable. Next, when clientB sends a particular dictionary item, server uses this global variable where it perviously stored clientA's connection instance to send a response back to clientA, alongside clientB.
Only one edge case I can see is that when clientA closes this connection instance, server will be trying to send a response to an invalidated connection.
Question:
Is this approach recommended? Any edge cases I should be aware of? Is there any better way to achieve this functionality?
Topic:
App & System Services
SubTopic:
Processes & Concurrency
Tags:
Inter-process communication
XPC
The simple test case is this:
@max[git:master]$ /usr/bin/ssh max ls /Volumes
Macintosh HD
TM2
me
me9
@max[git:master]$
and
@max[git:master]$ /usr/bin/ssh max /bin/bash -c "ls /Volumes"
Applications
Calibre Library
Desktop
...
The latter is NOT doing an ls of /Volumes/ but of my $HOME directory.
This is a recent change. I've had a script that is > 10 years old that just started failing.
Here's another look:
@max[git:master]$ /usr/bin/ssh max /bin/bash -c "cd /Volumes && pwd"
/Users/layer
@max[git:master]$ echo $?
0
@max[git:master]$
It's weird that it just silently ignores the cd.
This is on
ProductVersion: 15.3
BuildVersion: 24D60
Hello. I have a MacOS application to be distributed in a .pkg that is signed and notarized.
For the application to work, it needs some settings defined by us (non-secret strings that differ per client). My thought has been to use a .mobileconfig to send these settings using the com.apple.ManagedClient.preferences PayloadType. I can see these settings land correctly into the /Library/Managed Preferences directory (in the correct domain) when distributed using Apple Business Essentials as the MDM. However, I cannot read the settings using NSUserDefaults OR CFPreferences in objective-c (i've tried with my app unsigned and signed, but not signed ant notarized so far). I've seen some posts here and there about managed preferences being deprecated, so I'm not sure if this is my issue or if i'm simply reading the preferences incorrectly. I'll admit the conflict of some of these posts has me a bit confused about how the preferences subsystem works / whether it should be used at all. I'm on MacOS 15.3.
Two questions:
Does anything stand out as to why I wouldn't be able to read these properties?
Is there a better method I should be using to allow sending config via MDM to set application settings?
Thanks in advance!
Topic:
App & System Services
SubTopic:
General
I am using the Call Range Blocker App (App URL: https://apps.apple.com/in/app/call-ranger-spam-call-blocker/id1154832936) to block unwanted calls, so my phone doesn’t ring. However, despite being blocked, these calls still appear as unanswered calls in the call history, which is very frustrating.
When users block a number, they expect to block all communication from that number, including call logs. When I contacted the app developer, I was informed that after iOS 18, blocked calls are still showing up as unanswered calls in the call history.
I kindly request that Apple’s iOS development team look into this issue and address it in the next update. It is quite annoying to see blocked calls appear in the recent call history, and users would prefer not to have them show up at all.
Thank you
John
Hi, I am trying to understand how this mechanism integrates with shortcuts (and i guess siri + apple intelligence in near future) and other apps.
Basic setup is an AppEntity that implements 'transferable' and is returning a DataRepresentation of 'text'.
got an AppIntent returns a one of the 'entitities' and I'm simply trying to pass the result to initially email or another app using shortcuts. even with canned 'hello world' string being marshalled into DataRepresentation(.text) I am not seeing anything in usual system targets like email, messages, notes. It opens the app ok, but no text is present. (note: if I use an incorrect DataRepresentation type with email it'll flat out fail saying 'not correct 'text' type)
What exactly do I need to do here and is there any example code I can look at?
thanks
Hi! I've been developing iOS and macOS apps for many years, but now I am looking to dive into smth i have never touched before, namely privileged helpers, and i am struggling hard trying to find my footing.
Here’s my use case: I have a CLI tool that requires elevated privileges. I want to create a menu bar app that can interact with this tool, but I’m struggling to find solid documentation or examples of how to accomplish this using SMAppService. I might just be missing something obvious.
If anyone could point me toward relevant documentation, examples, articles, tutorials, or even a WWDC session that covers running privileged helpers with SMAppService, I would greatly appreciate it.
Thanks in advance!
Hi,
We are working on an app that communicates over a UDP connection on the local network. In our testing, we have a Python UDP client running on the same network, which responds when we send a message to a broadcast IP (255.255.255.255). This setup works as expected on an iOS 15 device.
However, when we test the same scenario on an iOS 18 device, the UDP communication doesn't seem to reach the Python UDP client. We've verified that the UDP client and the iOS device are on the same network, and the Python client is responding correctly.
Has Apple introduced any restrictions or changes regarding UDP broadcast behavior in iOS 18? Is broadcasting to 255.255.255.255 still supported, or has this functionality been limited in recent iOS versions?
Can i, personally, create .pkpass for other companies using my apple developer ID?
In order to create .pkpass, I need to create passTypIdentifier and teamIdentifier using apple developer ID
Is it okay to create those two identifiers and create coupons or membership cards for other companies?
I just wonder if it is against the law or developer guide.
Topic:
App & System Services
SubTopic:
Apple Pay
I'm trying to use Image Events instead of Photoshop to manipulate a bunch of images.
I need to extend the canvas and have the padding be white. I've tried
pad theImage to dimensions {545, 545} with pad color {65535, 65535, 65535}
But that does nothing. If I remove the 'with pad colour...' part, it works but the pad defaults to black. I've looked everywhere, but there doesn't seem to be a solution.
Is there one?
My code makes an iPhone use the CBCentralManager to talk to devices peripherals over core bluetooth.
After attempting a connect to a peripheral device, I get a didConnect callback on CBCentralManagerDelegate.
After this I initiate discovery of services using:
peripheral.discoverServices([CBUUID(nsuuid: serviceUUID)])
Since I am only interested in discovering my service of interest and not the others to speed up time to the actual sending of data.
This also gives me the didDiscoverServices callback without error prints in which I do the following:
guard let services = peripheral.services, !services.isEmpty else {
print("Empty services")
centralManager.cancelPeripheralConnection(peripheral)
return
}
And for next steps
if let serviceOfInterest = services.first(where: {$0.uuid == CBUUID(nsuuid: serviceUUID)}) { //double check for service we want
initiateDiscoverCharacteristics(peripheral: peripheral, service: serviceOfInterest)
}
Below is what initiateDiscoverCharacteristics() does. I basically only tries to discover certain characteristics of the selected service:
peripheral.discoverCharacteristics(
[CBUUID(nsuuid: readUUID),
CBUUID(nsuuid: writeUUID)],
for: serviceOfInterest)
For this also we get the didDiscoverCharacteristicsFor callback without error prints.
Here in this callback however we were not doing the serviceOfInterest check to see that we are getting the callback for the service we expect, since our understanding was that we will get didDiscoverCharacteristicsFor callback for the characteristics on the serviceOfInterest because that is what peripheral.discoverCharacteristics() was initiated for.
When we go ahead to write some data/subscribe for notify/read data we have 2 guard statements for services and characteristics of a particular service.
The first guard below passes:
if(peripheral.services == nil) {
print("services yet to be discovered \(peripheral.identifier.uuidString)")
return
}
However the second guard below fails:
let serviceOfInterest = peripheral.services?.first(where: {$0.uuid == CBUUID(nsuuid: serviceUUID})
if((serviceOfInterest?.characteristics == nil) || (serviceOfInterest?.characteristics == [])) {
print("characteristics yet to be discovered \(peripheral.identifier.uuidString)")
return
}
First of all, does the iPhone go ahead and discover other characteristics and services separately even when we explicitly mention the service and the characteristics it should discover?
Now if you say yes and that it maybe the reason of our bug because we didn't do a check for serviceOfInterest in didDiscoverCharacteristicsFor callback, then I have another question.
Why don't we get a second/third print in didDiscoverCharacteristicsFor callback signifying that more characteristics were discovered?
The peripheral device just disconnects after a set timeout (peripheral device used in our testing does this if we are not communicating with it for a certain amount of time).
This issue is extremely rare. We have seen it only twice in our customer base. Both the instances were on the same iPhone 15 Pro. Once a few months back and once recently. Currently, this iPhone is having iOS version 18.1.1 running on it.
I made an application in Script Editor and it works as expected. But the app seems to be getting automatically deleted at random times. For example, I made it a few days ago, tested it successfully, then went back today to look for it and it was gone. Tested this multiple times.
I bit more detail about my process:
I wrote the app in Script editor, exported it as an Application with run-only checked and no code signing
after manipulating a few things (.plist file, .icns file), I then remove extended attributes and code-sign using terminal. I have an Apple developer account that I use to code-sign:
xattr -cr <path_to_app>
codesign -s <my_developer_account> <path_to_app_bundle>
then I copy the app into my Applications folder and test it successfully
a day or more later, the app is gone (and I haven't even opened it again)
Ventura 13.1, Mac Book Pro 2021
Battery health reduced to 89 from 98 within 2 months on iPhone 15 Pro and Cycle Count is just 314.
Is it the software update doing this?