How do I check to see if a CKDatabaseSubscription has already been "saved" in CloudKit for a specific user? The Apple sample CloudKitShare actually has code to create database subscriptions each time the app is launched. If it is already there, the code ignores it.

I remember getting a message while running my iOS app on an iOS device that said I have to turn Developer mode on in my iOS device and I found the setting and turned on developer mode. I'm looking for that setting again so I can turn it off on iPhone I use, so that my app can check if Developer mode is on, and if it's not on, certain features are disabled, particularly one that deletes data on the device. That is intended to delete test data. I don't want actual data on my iPhone to be deleted. I need this precaution. When I looked at Developer Settings in Settings app on my iPhone 8 using iOS 15.6.1, there doesn't seem to be any way of turning off developer mode. Is there something I can check on my device that I can use to let my app know that I don't want certain features to be available on my app for that specific device?

What is one key-value pair of a dictionary called? Or what is the best word for it to call a variable? "Pair" seems to be the simplest and most intuitive. Is there a better name for a variable for such? I'm wondering if there is a technical term defined for swift.

Has anyone ever heard about any requests for swift to implement a "guard catch" statement? It would be like a do catch statement that allows code execution to continue like a guard statement does, and would provide an Error object to be used with a return statement or any of the key words a guard statement allows when the guard condition fails. It would look like this: guard do { . . . } catch { . . . return error }

Is the owner and the the app the only ones that can change the value of CKShare.publicPermission using UICloudSharingController? I mean, can a participant change the the value of CKShare.publicPermission using UICloudSharingController if the permission property of that participant is readWrite and the participant has access to the presented UICloudSharingController and its availablePermissions property includes allowReadWrite? What exactly does UICloudSharingController.PermissionOptions.allowReadWrite grant read and write access to? Does that mean the current user can change the CKShare.publicPermission property? I don't think the user can change the values of the permission properties of participants if he/she changes CKShare.publicPermission. The way participants are affected is that they may lose access to the CKShare, but their permission property can only be set by the owner. Am I right about this?

Has anyone noticed that with the latest iOS (16.1.2), UICloudSharingController doesn't restrict who can have access to the share when you set the availablePermissions to include .allowReadOnly and exclude .allowReadWrite. It behaves as I expect in the previous versions of iOS. Anyone know anything that would help me with this problem?

Does a database subscription send a notification when the current user of the device accept a CloudKit share?

Have any of you ever tried using a UITextView in stead of UITextField to do what UITextField does and does not do? I think it would make coding easier to since the two classes are similar but has to be treated a little differently by the code.

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 got this SSML from w3. org. AVSpeechUtterance(ssmlRepresentation:) is not complying with the contour. It doesn't change hz. <?xml version="1.0"?> <speak version="1.1" xmlns="http://www.w3.org/2001/10/synthesis" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3.org/2001/10/synthesis http://www.w3.org/TR/speech-synthesis11/synthesis.xsd" xml:lang="en-US"> <prosody contour="(0%,+20Hz) (10%,+30%) (40%,+10Hz)"> good morning </prosody> </speak> override func viewDidLoad() { super.viewDidLoad() guard let localUtterance = AVSpeechUtterance(ssmlRepresentation: self.speechSML) else { print("SML did not work.") return } self.utterance = localUtterance self.utterance.voice = self.voiceNoelle } self.synthesizer.speak(self.utterance)

How many CBService objects is a CBCharacteristic object allowed to belong to?

I ran out of disk space and I think I've come to the point that I need to delete files used by Xcode. Can I delete Simulator altogether? It doesn't look like I can run the latest Xcode without iOS 18 installed with it on my Mac Pro. Is there any way I can exclude iOS 18 support using the current Xcode? Would it be a good option to uninstall the latest Xcode and use a previous version of Xcode instead, since I'm not developing for iOS 18? Since I've been working on only macOS apps, is it possible for me to delete anything that has to do with developing for iOS?

I am writing an iOS app using Swift and Xcode 13.1. I am using the Contacts Framework, and I read that each app has a default contacts container, and the default container in an app can be different than the default container in another app, and there is not a default container for the entire device. What determines which is the default container for the app made by an Xcode project? I didn't set the default container for my app and somehow the contacts container for a Google account became the default contacts container for my app. How do I use code to set the default contacts container for my app? How do I find out which is the default container of Apple's Contacts app that comes with iOS? I would like to set my app's default contacts container to the same default container of Apple's Contacts app, if that is the contacts container that is saved on iCloud. If not, I would like to set my app's default contacts container to the contacts container that is saved in iCloud. I assume that only one contacts container is saved on iCloud.

Is there a way to use CallKit on the current service the device is subscribing to, such as ATT? I want to create an app that will block all emergency bypass, since I can’t programmatically turn emergency bypass off.

Hi. Is there a way to programmatically allow my iOS app to prevent all calls from making a sound or causing the iPhone to vibrate, other than unselecting Emergency Bypass from each contact? If not, is there any way to temporarily or permanently unselect Emergency Bypass on any given Contact? If not, is there any way of programmatically shutting off the iPhone?