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?

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?

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.

Is there a way to get the list of contacts in a message or message chain in Messages app on iOS. At one time when I looked for a way to do this there was no available way without jailbreaking. Has anything changed? Is there a way to do this now?

I want my app to allow the user to search for certain words in a video file and the transcript of that video. I found a Transcript class. I don't remember which Framework it is in. Would someone point me in the right direction? What Framework and Classes should I use.

Is there a way for my app to know that a phone number has just been messaged to or a call to 911 just started? Or SOS has just been executed by the user?