I have a UIViewController that initially does not display any scrollable content, but later on I add a child view controller that does scroll - a UIHostingController whose rootView is a GeometryReader containing a ScrollView. The problem is when you scroll the UINavigationBar remains transparent I’m sure because it couldn’t find a scroll view in the view hierarchy. There is an API to specify which scroll view to use but that’s a UIScrollView. How can I tell it about my SwiftUI scroll view? viewController.setContentScrollView(scrollView, for: .bottom)

I have an app that edits photos in your library. When I call try CIContext().writeHEIFRepresentation(of: editedImage, to: fileURL, format: .RGBA8, colorSpace: originalImage.colorSpace!) The following is logged to the console: writeImageAtIndex:1012: ⭕️ ERROR: 'App' is trying to save an opaque image (5712x4284) with 'AlphaLast'. This would unnecessarily increase the file size and will double (!!!) the required memory when decoding the image --> ignoring alpha. What does that mean and how can I resolve it? Xcode Version 16.0 (16A242d) iOS 18.1 (22B82)

Given an Apple Music trackId is it possible to query the user’s media library to see if they’ve added it to their library? Something like: let predicate = MPMediaPropertyPredicate(value: "1440818675", forProperty: MPMediaItemPropertyPersistentID) let query = MPMediaQuery(filterPredicates: Set([predicate])) let songs = query.items let isInLibrary = !songs.isEmpty

In iOS 17 when you search Spotlight for Notes you can see it has an App Shortcut titled New Note that simply opens the Notes app and starts composing a new note. When you open the Shortcuts app, create a new shortcut, search for and tap Notes, notice the New Note action is ONLY included at the top - it's not in the list of actions underneath. There is another intent in the list titled Create Note which will create a new note using the content you specify without opening the Notes app. I want to achieve this same thing in my app - an App Shortcut to open the app and start creating a new item, and a shortcut action to create a new item without opening the app. How can this be done? So far I have created two AppIntents, NewItem and CreateItem. My AppShortcutsProvider only includes NewItem. This works great when searching for my app in Spotlight. But when I open Shortcuts and go to add an action from my app to a shortcut, it includes Add Item at the top as an App Shortcut but also in the actions list underneath. Create Item is included in the list as well which is confusing. I don't want Add Item to be an available action because it's fairly useless to open the app and start creating an item, instead they should use Create Item to create an item in the background. Do I need to instead create a single shortcut that behaves differently in Spotlight vs Shortcuts, is that possible?

iOS 14 users can change the default email app. What effect, if any, does this have on MFMailComposeViewController? Currently if canSendMail() returns false I instruct the user to set up an account in the Mail app. Maybe the wording needs to be different?