In the context of OperationQueue, specifically in the documentation for the waitUntilAllOperationsAreFinished(), addOperation(Operation), and addOperation(()-Void) functions, what does "receiver" refer to? Does it refer to the instance of OperationQueue that calls the function?

I'm looking at this Swift documentation on Literal Expression, particularly the #dsohandle literal. It's the last line in the table. I can't find any documentation by Apple for "dynamic shared object (DSO) handle", as it says in the very right-most column. When I do a search for "dynamic shared object", I find information for technology by other companies. Anyone have anything you can tell me about this?

Does Cocoa Touch provide a convenient way for apps to perform logging? Perhaps something similar to the print() command except it is kept after the app is installed?

Would someone explain something about this content I got from this URL to Apple documentation? Logging ”You view log messages using the Console app, log command-line tool, or Xcode debug console. You can also access log messages programmatically using the OSLogframework.” I’m not sure what Console app runs on. Is that an app on macOS? I’m not really sure what to ask really. I’m looking for a way to get debug data from people using my app who download it from the App Store, so they won’t be using TestFlight. I did a search on Google but didn’t find what I needed to know. I’m trying to connect to the App Store on my iPhone, but it’s not able to connect. That seems to happen often for some reason. I wonder if this is talking about the Console app that I’m wondering about? https://help.dayoneapp.com/en/articles/470117-using-ios-console

What is that feature called that shows a picture of the entire contents of the file on the right-hand side of the editor and shows it very small like it's zoomed out and shows the part of the file that is currently showing in the editor in a different shade in the picture? I am describing this to the best of my ability. I hope it comes across clearly.

How do I sort an array of dictionary objects based on the value of the dictionary? I understand I should use the sorted method of the array, but I don't understand the notation that uses $0.1 and $0.0. Where is the documentation on that?

Am I able to see what Logger logs from my app when it's running on a device belonging to an external tester if my app doesn't crash? Am I able to see the logs if my app does crash? I am using Swift with Xcode for iOS.

If Apple Documentation does not say whether a certain method is allowed to be run on a background thread other than the main UI thread, does that mean it can or cannot be run on a background thread?

What are guidelines for numbering the build number? Should it just start with 0 and increment by one each time I archive a project for distribution?

How do I copy to file system or play with AVAudioPlayer an MPMediaItem that I get from an MPMediaPickerController initialized with type audio? When I try, I get an error that says:The file “item.mp3” couldn’t be opened because URL type ipod-library isn’t supported.

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?

For iOS, is there any way to add words into the dictionary that voice dictation recognizes and to the dictionary that the bar on top of the keyboard uses, that shows suggestions for words? I would like to make an iOS app that uses Biblical words such as "thee" and "thou". Any ideas will be appreciated.

I have an iOS app already on the App Store. I just changed my business to an LLC. I would like to change the bundle identifier in the next version of the app to reflect my new website address. What would happen if I did this? I want to decide whether it would be worth the trouble.

I'm trying to enable my app to receive a notification each time the event store changes.The documentation for EKEventStore at https://developer.apple.com/reference/eventkit/ekeventstore shows the following:static let EKEventStoreChanged: NSNotification.NameWhat does that mean? How do I use that information?