The intent property doesn't even show when I initialize an instance of NSExtensionContent, as in the following code: let extensionContext = NSExtensionContext() extensionContext.intent I get an error saying: Value of type 'NSExtensionContext' has no member 'intent' Why is this? The documentation doesn't say it is deprecated. Even when something is deprecated, it still shows in Xcode.

I tried running the following code and it raises the following error every time: DispatchQueue.main.sync { } Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) I found this post on stackoverflow that says to never run synchronous code on the main queue: DispatchQueue crashing with main.sync in Swift I had assumed that because the sync { } method is there that means there is some context that it can be used. Is there absolutely no use for executing synchronous code on the main queue?

Does an operation that is synchronous have to be run on a separate thread? I think so, otherwise it would deadlock right from the beginning, if it’s run on and called from the main thread. What about if it’s run on and called from a thread other than the main thread? Will it deadlock? This question arose when I was reading the following content at Documentation/Foundation/Task Management/Operation Asynchronous Versus Synchronous Operations When you add an operation to an operation queue, the queue ignores the value of the isAsynchronous property and always calls the start() method from a separate thread. Therefore, if you always run operations by adding them to an operation queue, there is no reason to make them asynchronous.

Anyone have any recommendations on how to resize a screen video of an iPhone from 750x1334 to 1080x1920 as required by App Store Connect? Or any alternative solutions?

In this documentation for completeRequest(returningItems:completionHandler:), there is a box shaded yellow that says: Important If the system calls your block with an expired value of true, you must immediately suspend your app extension. If you fail to do this, the system terminates your extension’s process. How does my app or my Share Extension know when the system calls the block spoken of?

Where is Apple's documentation of NSConcreteAttributedString? I need to get the String from NSExtensionItem.attributedContentText property, which is of type NSConcreteAttributedString.

Where is the “Use standard social compose interface” checkbox "in the Xcode target-adding pane" that the documentation for Share App Extension references in the "NOTE" grayed section under the "Use the Xcode Share Template"? I am sure it's not where it says it is.

What criteria does Apple use to determine whether a vCard sent for example as an email attachment has a duplicate? I would think there has to be more in common between the duplicates than just the given name and the family name? Does Apple say whether the given name, family name, and address enough similarities to consider two contacts duplicates of each other?

I'm looking for the Swift tutorial that had always been used since I started learning Swift for the first time about 5 years ago. I can't remember the name. It was an app that reviewed restaurants, as I remember. I need a sample of key-value-coding. I recall that tutorial used key-value-coding.

Is there a logical disjunction operator or function in Swift? Even better, is there a logical disjunction that works with optional variables instead of boolean variables that returns an object when true, and returns nil when false? A logical disjunction evaluates two boolean variables, and if at least one of them is true, then the return value is true. If neither variables is true, then the return value is false.

I would like my app to allow the Messages app to allow content shared with the user of the Messages app in iOS to automatically appear in my app when my app is selected in iOS Settings->Messages->Shared with You. I can't find information saying I can do this. The Share app extension doesn't enable this. Please someone say they know how to do this?

I signed out of iCloud in the iPhone 8 Simulator, and it has shown the screen saying "Removing iCloud data..." showing that it's working for a few hours now. When it did this before, I shut down the Simulator and when I opened the Simulator again, it shows that it never logged out of iCloud.

What is createdUserRecordName record type metadata used for? I can't find any information on it. I see it in CloudKit dashboard for every record type.

What would happen if I add an index to a record type in development that isn't there in production, then I deploy the development into production?

Where can I find a list of those characters that can be put in front of the ""character in a string literal, such as "n", thus the following would print a new line? I don't know what those characters are called. I thought they were called "escape characters" or "format specifiers". print("\n", terminator: "")