I'm trying out Apple's Document Browser I am trying to find what UTTypeIdentifier com.apple.coreaudio-​format conforms to for the UTTypeConformsTo item in Info.plist of said project. I was able to find com.apple.coreaudio-​format, but I am having trouble finding the UTTypeConformsTo value for that. Anyone can guide me or give me a hint?

I am preparing to submit an app for the very first time.Why is the default version number 1.0? Doesn't that 0 get truncated? Would it be better if I changed the version number to 1? Would it make a difference?

Anyone know how to use the Share Extension for iOS that either shows an alert or shows nothing at all when another app shares with your app? Am I allowed to use a UIAlertController?

I have this error: [AXRuntimeCommon] AX Lookup problem - errorCode:1100 error:Permission denied portName:'com.apple.iphone.axserver' PID:963 It is preceded by lots of this message, if it matters: [Assert] +[UIInputViewSetPlacementInvisible placementWithPlacement:]: Should not be called with an invisible placement I thought it was because I didn't include a key in Info.plist, but I put keys in there that I thought might be needed. I am using CloudKit sharing and silent push notifications for CloudKit subscriptions, and the Apple documentation says when I set the capabilities for background fetch and remote notifications, the keys would be put in Info.plist by Xcode. Does this have anything to do with the fact that when my app is run for the first time it asks the user for permission to send notifications. If it's a silent notification that I'm using, I thought the documentation meant the user is not notified at all? I have searched on the internet and on stack overflow and in Apple developer forums for a solution. Any help will be appreciated.

If I want to compare characters in iOS using the character code, how do I decide whether to compare the characters by their utf8 or utf16 or ascii code values? I specifically would like to remove all characters from a CNPhoneNumber.stringValue that other than digits.

I'm getting message "This operation can fail if the version of the OS on the device is incompatible with the installed version of Xcode. You may also need to restart your mac and device in order to correctly detect compatibility." when I try to run an Xcode iOS project on my iPhone 8. I'm using Xcode 13.2.1 and iOS 15.4 on my iPhone 8. This post in this forums gives the solution to restart the iOS device and I did that and also restarted the mac. My Mac has macOS Monterey 12.3. My Xcode, Mac, and iPhone 8 all have the most recent updates. That post gives an answer for the same problem but with iOS 15.2. I have recently changed settings in my iPhone 8 in Accessibility. Could that affect anything?

Why did I get an error in playground in debug window for this code? print("// MARK: - Start execable code here...") do { let store = CNContactStore() if try await store.requestAccess(for: .contacts) { // Do something with Contacts. let phoneNumber = CNPhoneNumber(stringValue: "903-276-1046") let predicateForContactsMatchingPhoneNumber = CNContact.predicateForContacts(matching: phoneNumber) let contactFetchRequest = CNContactFetchRequest(keysToFetch: thoroughKeysToCompare) contactFetchRequest.predicate = predicateForContactsMatchingPhoneNumber contactFetchRequest.unifyResults = true var contactOfMe: CNContact! = nil try! store.enumerateContacts(with: contactFetchRequest) { contact, stop in contactOfMe = contact stop.pointee = true } let contact = Contact(cnContact: contactOfMe) for property in contact.enumerated() { print("- \(property)") } } else { // Handle if Contacts access is denied. fatalError() } } catch { // Handle any error. print("error requesting access: \(error.localizedDescription)") } Debug window: // MARK: - Start execable code here... Playground execution failed: error: Execution was interrupted, reason: shared-library-event. The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation. * thread #1, queue = 'com.apple.main-thread' frame #0: 0x00007ff80002f931 libobjc.A.dylib`_mapStrHash(_NXMapTable*, void const*) + 73 frame #1: 0x00007ff80002fc7f libobjc.A.dylib`_NXMapMember(_NXMapTable*, void const*, void**) + 35 frame #2: 0x00007ff80003b7ae libobjc.A.dylib`getProtocol(char const*) + 41 frame #3: 0x00007ff8000428e6 libobjc.A.dylib`class_conformsToProtocol + 337 frame #4: 0x00007ff80004ab4e libobjc.A.dylib`-[NSObject conformsToProtocol:] + 47 frame #5: 0x0000000109c27951 UIKitCore`_UIFocusItemContainerIsScrollableContainer + 74 frame #6: 0x0000000109c28e38 UIKitCore`-[_UIFocusEnvironmentContainerTuple initWithOwningEnvironment:itemContainer:] + 194 frame #7: 0x0000000109c28fed UIKitCore`+[_UIFocusEnvironmentContainerTuple tupleWithOwningEnvironment:itemContainer:] + 70 frame #8: 0x0000000109c4f41e UIKitCore`_UIFocusRegionContainerFromEnvironmentAndContainer + 44 frame #9: 0x0000000109c27ed3 UIKitCore`_UIFocusItemContainerAddChildItemsInContextWithArguments + 1162 frame #10: 0x000000010a99c439 UIKitCore`-[UIView _searchForFocusRegionsInContext:] + 962 frame #11: 0x0000000109c6b37f UIKitCore`-[_UIFocusMapSnapshot addRegionsInContainer:] + 4583 frame #12: 0x0000000109c69740 UIKitCore`-[_UIFocusMapSnapshot _capture] + 456 frame #13: 0x0000000109c67fc5 UIKitCore`-[_UIFocusMapSnapshot _initWithSnapshotter:mapArea:searchArea:] + 628 frame #14: 0x0000000109c6cce2 UIKitCore`-[_UIFocusMapSnapshotter captureSnapshot] + 227 frame #15: 0x0000000109c5f450 UIKitCore`-[_UIFocusMap _inferredDefaultFocusItemInEnvironment:] + 147 frame #16: 0x0000000109c2b1cf UIKitCore`-[_UIFocusEnvironmentPreferenceEnumerationContext _inferPreferencesForEnvironment:] + 157 frame #17: 0x0000000109c2abbc UIKitCore`-[_UIFocusEnvironmentPreferenceEnumerationContext _resolvePreferredFocusEnvironments] + 118 frame #18: 0x0000000109c2ab12 UIKitCore`-[_UIFocusEnvironmentPreferenceEnumerationContext prefersNothingFocused] + 31 frame #19: 0x0000000109c2beeb UIKitCore`_enumeratePreferredFocusEnvironments + 198 frame #20: 0x0000000109c2c061 UIKitCore`_enumeratePreferredFocusEnvironments + 572 frame #21: 0x0000000109c2c061 UIKitCore`_enumeratePreferredFocusEnvironments + 572 frame #22: 0x0000000109c2c061 UIKitCore`_enumeratePreferredFocusEnvironments + 572 frame #23: 0x0000000109c2bd11 UIKitCore`-[_UIFocusEnvironmentPreferenceEnumerator enumeratePreferencesForEnvironment:usingBlock:] + 230 frame #24: 0x0000000109c2c747 UIKitCore`-[_UIDeepestPreferredEnvironmentSearch deepestPreferredFocusableItemForEnvironment:withRequest:] + 817 frame #25: 0x0000000109c95837 UIKitCore`-[UIFocusUpdateContext _updateDestinationItemIfNeeded] + 265 frame #26: 0x0000000109c95627 UIKitCore`-[UIFocusUpdateContext _destinationItemInfo] + 22 frame #27: 0x0000000109c95535 UIKitCore`-[UIFocusUpdateContext nextFocusedItem] + 24 frame #28: 0x0000000109c71ea6 UIKitCore`-[UIFocusSystem updateFocusIfNeeded] + 1347 frame #29: 0x0000000109c7608c UIKitCore`__43-[UIFocusSystem _updateFocusUpdateThrottle]_block_invoke + 34 frame #30: 0x000000010a94b971 UIKitCore`-[_UIAfterCACommitBlock run] + 57 frame #31: 0x000000010a94be71 UIKitCore`-[_UIAfterCACommitQueue flush] + 191 frame #32: 0x000000010a3926eb UIKitCore`_runAfterCACommitDeferredBlocks + 782 frame #33: 0x000000010a380fa2 UIKitCore`_cleanUpAfterCAFlushAndRunDeferredBlocks + 96 frame #34: 0x000000010a3b6be1 UIKitCore`_afterCACommitHandler + 58 frame #35: 0x00007ff8003b1c12 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23 frame #36: 0x00007ff8003ac57f CoreFoundation`__CFRunLoopDoObservers + 515 frame #37: 0x00007ff8003acaa2 CoreFoundation`__CFRunLoopRun + 1121 frame #38: 0x00007ff8003ac264 CoreFoundation`CFRunLoopRunSpecific + 560 frame #39: 0x00007ff8003ad234 CoreFoundation`CFRunLoopRun + 40 frame #40: 0x00007ff83755a4e3 libswift_Concurrency.dylib`swift_task_asyncMainDrainQueueImpl() + 35 frame #41: 0x00007ff83755a4b4 libswift_Concurrency.dylib`swift_task_asyncMainDrainQueue + 52 frame #42: 0x00000001015d409f $__lldb_expr32`main at <unknown>:0 frame #43: 0x0000000100e25560 EnumeratedContactsCNContact`linkResources + 256 frame #44: 0x00007ff8003b2986 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12 frame #45: 0x00007ff8003b2148 CoreFoundation`__CFRunLoopDoBlocks + 399 frame #46: 0x00007ff8003ace09 CoreFoundation`__CFRunLoopRun + 1992 frame #47: 0x00007ff8003ac264 CoreFoundation`CFRunLoopRunSpecific + 560 frame #48: 0x00007ff809b4024e GraphicsServices`GSEventRunModal + 139 frame #49: 0x000000010a3827bf UIKitCore`-[UIApplication _run] + 994 frame #50: 0x000000010a3875de UIKitCore`UIApplicationMain + 123 * frame #51: 0x0000000100e256c5 EnumeratedContactsCNContact`main + 357 frame #52: 0x0000000100fbb384 dyld_sim`start_sim + 10 frame #53: 0x000000010943341f dyld`start + 1903```

How do I use Core Bluetooth in the simplest possible way to send a value of 0 to 1 from an iOS device to a bluetooth peripheral that does nothing but interpret the value sent to it as how strongly a vibrating component on the bluetooth peripheral should vibrate. A value of zero would mean the peripheral device doesn't vibrate at all, of course. The bluetooth peripheral would be the bluetooth ***** of course, and the iOS device would be the bluetooth master. The ***** device doesn't need to send anything at all to the master iOS device, except to link to the master. I don't know if that would allow the ***** bluetooth device to be any less expensive or smaller or simpler.

Is there a way to show what properties are in a vCard shared with a user in context of the current CNContact the same way in ContactViewController that iOS finds through Siri?

The documentation for hightlightProperty(withKey:identifier:) describes the parameter "key" as the "Key of the property to highlight." I believe that refers to the CNKeyDescriptor, such as CNContactGivenNameKey, which can cast from a type CNKeyDescriptor to String. The documentation for identifier is "the value to highlight". I believe an example of that would be "John" as the given name. Am I correct about all this? In any case, I'm not able to highlight an email property when I use CNContactEmailAddresses as the key, and an actual email address as the identifier. I have also tried using the identifier property of CNLabeledValue, which is how an email address is stored. I can't find anything on the internet to explain this. I didn't even find a similar question, except my own question asking this exact same question about two months ago. Anyone have any idea or a good answer for this?

I used the Date class such as "currentTime = Date()", but I get a date that is off by 5 hours exactly. How do I get the current time? Is there a time zone setting I have to set?

Why am I getting this error during code time in editor window of Xcode at every call to print function? Use of 'print' refers to instance method rather than global function 'print(_:separator:terminator:)' in module 'Swift'

I don't see any current posts about the warning that says "PosterBoard quit unexpectedly." on my Mac. Older posts say this is an error generated by Xcode Simulator. I tried one of those solutions but I still see this warning coming up. I am also not using Simulator. I'm using an actual device - an iPhone 13 Pro Max running iOS 16.6. When I click on Reopen in that alert box telling me that warning message, I get a warning in an alert box with a picture of the Finder icon on it, and it says "You can’t open the application “PosterBoard.app” because this application is not supported on this Mac.". Anyone else have this problem and know what do do about it? Like fix it or get around it?

Why am I getting an error message when I try to validate an archive that says, "No accounts with iTunes Connect access have been found for the team. iTunes Connect access is required for App Store distribution."?I have never gotten this error message before. What should I do?

Please say there is a way to programmatically delete playlists in Apple Music in iOS? I'll take any possible way or any hints whatsoever.