Hi team, is there a native way to detect if a change has been made to biometrics using FaceID or TouchID? Thanks in advance.

Hi everyone, I'm developing a Capacitor plugin to display an RTSP video stream using MobileVLCKit on iOS. The Android side works perfectly, but I can’t get the iOS plugin to work — it seems my Swift file is not being detected or recognized, even though I’ve followed the official steps. What works: I followed the Capacitor Plugin Development Guide. I implemented the Android version of the plugin in Java inside the android/ folder. Everything works perfectly from Angular: the plugin is recognized and calls execute correctly. The issue on iOS: I implemented the iOS part in Swift, using the official MobileVLCKit documentation. I initially placed my RtspVlcPlugin.swift file in the plugin’s iOS folder, as the docs suggest. Then I moved it directly into the main app’s ios/App/App/ folder next to AppDelegate.swift and tried manual registration. The problem: Even though I manually register the plugin with: if let bridge = self.window?.rootViewController as? CAPBridgeViewController { bridge.bridge?.registerPluginInstance(RtspVlcPlugin()) print("✅ Plugin RtspVlcPlugin registered manually.") } It prints the registration message just fine. BUT from Angular, the plugin is not recognized: Capacitor.Plugins.RtspVlcPlugin has no methods, and I get this error: "code":"UNIMPLEMENTED" I also tried declaring @objc(RtspVlcPlugin) and extending CAPPlugin. I’ve verified RtspVlcPlugin.swift is added to the target and compiled. The Swift file doesn’t seem to register or expose any methods to Angular. I even tried adding the code without using a plugin at all — just creating a Swift class and using it via the AppDelegate, but it still doesn't expose any callable methods. My Swift code (RtspVlcPlugin.swift): import Capacitor import MobileVLCKit @objc(RtspVlcPlugin) public class RtspVlcPlugin: CAPPlugin, VLCMediaPlayerDelegate { var mediaPlayer: VLCMediaPlayer? var containerView: UIView? var spinner: UIActivityIndicatorView? @objc func iniciar(_ call: CAPPluginCall) { guard let urlStr = call.getString("url"), let x = call.getDouble("x"), let y = call.getDouble("y"), let w = call.getDouble("width"), let h = call.getDouble("height"), let url = URL(string: urlStr) else { call.reject("Missing parameters") return } DispatchQueue.main.async { self.containerView?.removeFromSuperview() let cont = UIView(frame: CGRect(x: x, y: y, width: w, height: h)) cont.backgroundColor = .black cont.layer.cornerRadius = 16 cont.clipsToBounds = true let sp = UIActivityIndicatorView(style: .large) sp.center = CGPoint(x: w/2, y: h/2) sp.color = .white sp.startAnimating() cont.addSubview(sp) self.spinner = sp self.containerView = cont self.bridge?.viewController?.view.addSubview(cont) let player = VLCMediaPlayer() player.delegate = self player.drawable = cont player.media = VLCMedia(url: url) self.mediaPlayer = player player.play() call.resolve() } } @objc func cerrar(_ call: CAPPluginCall) { DispatchQueue.main.async { self.mediaPlayer?.stop() self.mediaPlayer = nil self.spinner?.stopAnimating() self.spinner?.removeFromSuperview() self.spinner = nil self.containerView?.removeFromSuperview() self.containerView = nil call.resolve() } } public func mediaPlayerStateChanged(_ aNotification: Notification!) { guard let player = mediaPlayer, player.state == .playing, let sp = spinner else { return } DispatchQueue.main.async { sp.stopAnimating() sp.removeFromSuperview() self.spinner = nil } } } In the Angular project, I’m using the plugin by manually registering it with registerPlugin from @capacitor/core. Specifically, in the service where I need it, I do the following: import { registerPlugin } from '@capacitor/core'; const RtspVlcPlugin: any = registerPlugin('RtspVlcPlugin'); After this, I try to call the methods defined in the iOS plugin, like RtspVlcPlugin.iniciar({ ... }), but I get an UNIMPLEMENTED error, which suggests that the plugin is not exposing its methods properly to the Angular/Capacitor environment. That makes me believe the problem lies in how the Swift file is integrated or registered, rather than how it is used from Angular. I’d appreciate any guidance on how to properly expose a Swift-based Capacitor plugin’s methods so that they are accessible from Angular. Is there any additional registration step or metadata I might be missing on the iOS side?

Hi everyone, I’m working on a Capacitor app built with Angular, and I’m trying to call a Swift class directly from the root of the iOS project (next to AppDelegate.swift) without using a full Capacitor plugin structure. The Swift file is called RtspVlcPlugin.swift and looks like this: import Capacitor @objc(RtspVlcPlugin) public class RtspVlcPlugin: CAPPlugin { @objc func iniciar(_ call: CAPPluginCall) { call.resolve() } } In AppDelegate.swift I register it like this: if let bridge = self.window?.rootViewController as? CAPBridgeViewController { bridge.bridge?.registerPluginInstance(RtspVlcPlugin()) print("✅ RtspVlcPlugin registered.") } The registration message prints correctly in Xcode logs. But from Angular, when I try to call it like this: import { registerPlugin } from '@capacitor/core'; const RtspVlcPlugin: any = registerPlugin('RtspVlcPlugin'); RtspVlcPlugin.iniciar({ ... }); I get this error: {"code":"UNIMPLEMENTED"} So, even though the plugin is registered manually, it’s not exposing any methods to the Angular/Capacitor runtime. My question is: What is the correct way to access a manually created Swift class (in the root of the iOS project) from Angular via Capacitor? Thanks in advance!

Our app provides a calendar that integrates with the default calendar app. Specifically, we use iOS EventKit to perform CRUD operations on calendar data. Recently, we have received reports from users that all of their events have disappeared. However, after reviewing our implementation and logs, we have not been able to identify the cause. Some users have also reported that all data in their default calendar app has disappeared as well. Does anyone have any idea what might be causing this? To delete an event within our app, users must press the delete button and then confirm the deletion in a dialog. Additionally, it is not possible to delete more than two events at once. We've seen many people in the community discussing a bug where calendar events disappear after updating to iOS 18. If you have any information about when or why this happens, we'd appreciate it if you could share your insights.

I'd like to know if there is a new property we can use in the definition of a Swift Package in the new Xcode 26, where we can set the whole package to run on Main Actor, as we have it in our apps for Xcode 26.

I have my project running perfectly fine on Xcode 16. However, in Xcode 26 it doesn't build due to an error that I do not understand. I have three files that pertain to this error: // FriendListResponse.swift import Foundation struct FriendListResponse: Decodable { var friendships: [Friendship] var collections: [FriendCollection] } // Friendship.swift import Foundation struct Friendship: Decodable { var createdAt: String var friendId: Int var friendUserId: Int // user ID of the friend var friendUsername: String var id: Int var tagNames: [String] } // FriendCollection.swift struct FriendCollection: Decodable { var id: Int var permalink: String var tagNames: [String] var title: String } On the first file, FriendListResponse.swift, I am the simple error message "circular reference." I do not understand how these self-contained structs could create a circular reference. Although I have other data types in my project, none of them are even referenced in these files except for Friendship and FriendCollection. The FriendListResponse is a struct that is created from JSON values that are fetched from an API. This is the function that fetches the JSON: public static func listFriends(username: String) async throws -> [Friendship] { let data = try await sendGETRequest( url: "people/\(username)/friends/list.json" ) print(String(data: data, encoding: .utf8)!) let decoder = JSONDecoder() decoder.keyDecodingStrategy = .convertFromSnakeCase let wrapper = try decoder.decode(FriendListResponse.self, from: data) return wrapper.friendships } // Note: the function sendGETRequest is just // a function that I have created that takes a set // of parameters and returns a data object // using the HTTP GET protocol. I don't think // that it is related to this issue. However, if you // think that it is, I can share the code for that. This error has also happened in a few other cases within contained networks of my data structure. I do not know why this error is only appearing once I launch Xcode 26 beta with my project files. I would think that this error also would appear in Xcode 16.4. Any help would be greatly appreciated in my process to compile my project on Xcode 26!

Hi, I was testing the lockdown mode in iOS 16 and would like to know whether we can detect the lockdown mode status using any public API that Apple provides. I really appreciate any help you can provide.

Hi everyone, I'm developing an iOS app using the AppsFlyer SDK. I understand that starting with iOS 14.5, if a user denies the App Tracking Transparency (ATT) permission, we are not allowed to access the IDFA or perform cross-app tracking. However, I’d like to clarify which in-app events are still legally and technically safe to send when the user denies ATT permission. Specifically, I want to know: Is it acceptable to send events like onboarding_completed, paywall_viewed, subscription_started, subscribe, subscribe_price, or app_opened if they are not linked to IDFA or any form of user tracking? Would sending such internal behavioral events (used purely for SKAdNetwork performance tracking or in-app analytics) violate Apple’s privacy policy if no device identifiers are attached? Additionally, if these events are sent in fully anonymous form (i.e., not associated with IDFA, user ID, email, or any identifiable metadata), does Apple still consider this a privacy concern? In other words, can onboarding_completed, paywall_viewed, subsribe, subscribe_price, etc., be sent in anonymous format without violating ATT policies? Are there any official Apple guidelines or best practices that outline what types of events are considered compliant in the absence of ATT consent? My goal is to remain 100% compliant with Apple’s policies while still analyzing meaningful user behavior to improve the in-app experience. Any clarification or pointers to documentation would be greatly appreciated. Thanks in advance!

I sometimes use Xcode 14.2. Recently, I have an issue with simulators: on some SwiftUI project, the simulator list is empty. I created a new project. I see the complete list of simulators, but when running for a simulator, it fails with following diag; Same error with UIKit project. Details Unable to boot the Simulator. Domain: NSPOSIXErrorDomain Code: 60 Failure Reason: launchd failed to respond. User Info: { DVTErrorCreationDateKey = "2025-06-29 06:16:35 +0000"; IDERunOperationFailingWorker = "_IDEInstalliPhoneSimulatorWorker"; Session = "com.apple.CoreSimulator.SimDevice.134EC197-BA6B-45DF-B5B2-61A1D4F14863"; } -- Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding Domain: com.apple.SimLaunchHostService.RequestError Code: 4 -- Analytics Event: com.apple.dt.IDERunOperationWorkerFinished : { "device_model" = "iPhone15,2"; "device_osBuild" = "16.2 (20C52)"; "device_platform" = "com.apple.platform.iphonesimulator"; "launchSession_schemeCommand" = Run; "launchSession_state" = 1; "launchSession_targetArch" = "x86_64"; "operation_duration_ms" = 8341; "operation_errorCode" = 60; "operation_errorDomain" = NSPOSIXErrorDomain; "operation_errorWorker" = "_IDEInstalliPhoneSimulatorWorker"; "operation_name" = IDERunOperationWorkerGroup; "param_consoleMode" = 0; "param_debugger_attachToExtensions" = 0; "param_debugger_attachToXPC" = 1; "param_debugger_type" = 3; "param_destination_isProxy" = 0; "param_destination_platform" = "com.apple.platform.iphonesimulator"; "param_diag_MainThreadChecker_stopOnIssue" = 0; "param_diag_MallocStackLogging_enableDuringAttach" = 0; "param_diag_MallocStackLogging_enableForXPC" = 1; "param_diag_allowLocationSimulation" = 1; "param_diag_checker_tpc_enable" = 1; "param_diag_gpu_frameCapture_enable" = 0; "param_diag_gpu_shaderValidation_enable" = 0; "param_diag_gpu_validation_enable" = 0; "param_diag_memoryGraphOnResourceException" = 0; "param_diag_queueDebugging_enable" = 1; "param_diag_runtimeProfile_generate" = 0; "param_diag_sanitizer_asan_enable" = 0; "param_diag_sanitizer_tsan_enable" = 0; "param_diag_sanitizer_tsan_stopOnIssue" = 0; "param_diag_sanitizer_ubsan_stopOnIssue" = 0; "param_diag_showNonLocalizedStrings" = 0; "param_diag_viewDebugging_enabled" = 1; "param_diag_viewDebugging_insertDylibOnLaunch" = 1; "param_install_style" = 0; "param_launcher_UID" = 2; "param_launcher_allowDeviceSensorReplayData" = 0; "param_launcher_kind" = 0; "param_launcher_style" = 0; "param_launcher_substyle" = 0; "param_runnable_appExtensionHostRunMode" = 0; "param_runnable_productType" = "com.apple.product-type.application"; "param_runnable_type" = 2; "param_testing_launchedForTesting" = 0; "param_testing_suppressSimulatorApp" = 0; "param_testing_usingCLI" = 0; "sdk_canonicalName" = "iphonesimulator16.2"; "sdk_osVersion" = "16.2"; "sdk_variant" = iphonesimulator; } -- System Information macOS Version 12.7.1 (Build 21G920) Xcode 14.2 (21534) (Build 14C18) Timestamp: 2025-06-29T08:16:35+02:00 I filed a bug report: FB18475006

App design: macos, Xcode 16.4, Sequioa 15.5, it is sandboxed Uses: Pods->HotKey for a global hotkey which xcode says "binary compatibility can't be guaranteed" This app is on the Apple Store and supposedly apps on the Apple Store can't use global hotkeys. Someone internally, installed it from the store and the global hotkey works just fine. I'm concerned for two potential problems; I need to find a hotkey library or code that is known to work with a sandbox'd Apple Store app. Why is it working now when everything I have read says it shouldn't.

My experience with Swift 6 strict concurrency so far doesn't match my understanding of implicit MainActor isolation semantics. This is a cross-post from StackOverflow. I will link answers between both forums. TL;DR Build succeeds when testing a struct declared in the test module, but fails when the struct is moved to the main module: Main actor-isolated property … cannot be accessed from outside the actor. Steps to reproduce Open up Xcode 26 beta 2 on macOS 26 (probably also ok on current stables). Create a new Swift app with Swift testing, no storage. Call it WhatTheSwift. Set the Swift Language Version on all three targets to Swift 6. Update the default test file to be this: import Testing @testable import WhatTheSwift struct WhatTheSwiftTests { @Test func example() async throws { let thing = Thing(foo: "bar") #expect(thing.foo == "bar") } } struct Thing { let foo: String } That should build fine, and the tests should pass. Now, move the Thing declaration into its own Thing.swift file in the WhatTheSwift module, and try running the test again. You should see this: Observations Marking the test @MainActor allows the test to pass, suggesting the compiler actually wants to isolate Thing.foo to the main actor. My question Why? And why only when Thing is in a different module?

While editing the search text using the external keyboard (with VoiceOver on), if I try to navigate the to List using the keyboard, the focus jumps back to the search field immediately, preventing selection of list items. It's important to note that the voiceover navigation alone without a keyboard works as expected. It’s as if the List never gains focus—every attempt to move focus lands back on the search field. The code: struct ContentView: View { @State var searchText = "" let items = ["Apple", "Banana", "Cherry", "Date", "Elderberry", "Fig", "Grape"] var filteredItems: [String] { if searchText.isEmpty { return items } else { return items.filter { $0.localizedCaseInsensitiveContains(searchText) } } } var body: some View { if #available(iOS 16.0, *) { NavigationStack { List(filteredItems, id: \.self) { item in Text(item) } .navigationTitle("Fruits") .searchable(text: $searchText) } } else { NavigationView { List(filteredItems, id: \.self) { item in Text(item) } .navigationTitle("Fruits") .searchable(text: $searchText) } } } }

I’m updating my app’s alternate icons using UIApplication.shared.setAlternateIconName, and I noticed that in iOS 26, Xcode now supports the new .icon file format for App Icons. Is it possible to reference .icon files directly for alternate icons? Or does setAlternateIconName still only support traditional .png assets inside the AppIcon set? I couldn’t find any documentation confirming this either way, and I want to ensure compatibility with the new format while supporting alternate icons. Any clarification or Apple documentation link would be greatly appreciated!

I have this build error with Xcode 26 beta 2: var asset:AVURLAsset? func loadAsset() { let assetURL = URL.documentsDirectory .appendingPathComponent("sample.mov") asset = AVURLAsset(url: assetURL, options: [AVURLAssetPreferPreciseDurationAndTimingKey: true]) /*Error: Type of expression is ambiguous without a type annotation */ if let result = try? await asset?.load(.tracks, .isPlayable, .isComposable) { } } Is there an issue with try? in the new Swift compiler? Error: Type of expression is ambiguous without a type annotation

Hi all, I'm developing a standalone SwiftUI watchOS app (no iOS host or extension), targeting watchOS 11.5, and running into persistent connection issues with Xcode. Xcode rarely detects my Apple Watch (Series 7, watchOS 11.5) Sometimes it appears nested under the iPhone; most of the time, it doesn’t Errors include: "OS version is lower than the deployment target" (both are 11.5) "Unable to install... device not supported" "Connection error 4000", "Tunnel timeout error 1001" "Ensure Wi-Fi is enabled on both machines" (Wi-Fi is on and on the same network) Once in a while, the app does install, but mostly I’m blocked. What I’ve Tried Verified pairing and trust Cleaned builds, nuked Derived Data and caches Reset iPhone privacy settings Removed and re-added my Apple ID Used xcrun xctrace list devices (watch inconsistently appears) Despite this, the app only installs about 5% of the time. Testing (or even running) on real hardware is nearly impossible, and has become incredibly frustrating for me. Any help or insights would be much appreciated.

Hello Everyone, I am currently using macOS 15.5 and XCode 16.4. I am using the following code to send/receive multicast packets on multicast group ff02::1 and port 49153 using Apple NF's NWConnectionGroup. import Network import Foundation // Creating a mutlicast group endpoint let multicastIPv6GroupEndpoint: NWEndpoint = NWEndpoint.hostPort(host: NWEndpoint.Host.ipv6(IPv6Address("ff02::1")!), port: NWEndpoint.Port("49153")!) do { let multicastGroupDescriptor: NWMulticastGroup = try NWMulticastGroup (for: [multicastIPv6GroupEndpoint]) let multicastConnectionGroupDescriptor = NWConnectionGroup (with: multicastGroupDescriptor, using: .udp) multicastConnectionGroupDescriptor.stateUpdateHandler = { state in print ("🕰️ Connection Group state: \(state)") if state == .ready { multicastConnectionGroupDescriptor.send (content: "👋🏻 Hello from the Mac 💻".data (using: .utf8)) { err in print ("➡️ Now, I am trying to send some messages.") if let err = err { print ("💥 Error sending multicast message: \(err)") } else { print ("🌚 Initial multicast message sent") } } } } multicastConnectionGroupDescriptor.setReceiveHandler { message, content, isComplete in if let content = content, let messageString = String (data: content, encoding: .utf8) { print ("⬅️ Received message: \(messageString)") } } multicastConnectionGroupDescriptor.start (queue: .global()) } catch { print ("💥 Error while creating Multicast Group: \(error)") } RunLoop.main.run() I am able to successfully create a NWConnectionGroup without any warnings/errors. The issue occurs when the stateUpdateHandler's callback gets invoked. It first gives me this warning: nw_listener_socket_inbox_create_socket IPV6_LEAVE_GROUP ff02::1.49153 failed [49: Can't assign requested address But then it shows me that the state is ready: 🕰️ Connection Group state: ready After this, when the send is performed, it gives me a bunch of errros: nw_endpoint_flow_failed_with_error [C1 ff02::1.49153 waiting parent-flow (unsatisfied (Local network prohibited), interface: en0[802.11], ipv4, ipv6, uses wifi)] already failing, returning nw_socket_connect [C1:1] connectx(7, [srcif=0, srcaddr=::.62838, dstaddr=ff02::1.49153], SAE_ASSOCID_ANY, 0, NULL, 0, NULL, SAE_CONNID_ANY) failed: [48: Address already in use] nw_socket_connect [C1:1] connectx failed (fd 7) [48: Address already in use] nw_socket_connect connectx failed [48: Address already in use] nw_endpoint_flow_failed_with_error [C1 ff02::1.49153 in_progress socket-flow (satisfied (Path is satisfied), interface: en0[802.11], ipv4, ipv6, dns, uses wifi)] already failing, returning There is no other background process running on the same port. I tried using different ports as well as multicast groups but the same error persists. The same code works fine for an IPv4 multicast group. I have following questions: Why am I getting these errors specifically for IPv6 multicast group but not for IPv4 multicast group? Are there any configurations that needed to be done in order to get this working?

Hey everyone, I’m developing an app for visionOS where I need to display the Apple Vision Pro’s current IP address. For this I’m using the following code, which works for iOS, macOS, and visionOS in the simulator. Only on a real Apple Vision Pro it’s unable to extract an IP. Could it be that visionOS currently doesn’t allow this? Have any of you had the same experience and found a workaround? var address: String = "no ip" var ifaddr: UnsafeMutablePointer<ifaddrs>? = nil if getifaddrs(&ifaddr) == 0 { var ptr = ifaddr while ptr != nil { defer { ptr = ptr?.pointee.ifa_next } let interface = ptr?.pointee let addrFamily = interface?.ifa_addr.pointee.sa_family if addrFamily == UInt8(AF_INET) { if let name: Optional<String> = String(cString: (interface?.ifa_name)!), name == "en0" { var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST)) getnameinfo(interface?.ifa_addr, socklen_t((interface?.ifa_addr.pointee.sa_len)!), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST) address = String(cString: hostname) } } } freeifaddrs(ifaddr) } return address } Thanks in advance for any insights or tips! Best Regards, David

I'm building a SwiftUI app using SwiftData. In my app I have a Customer model with an optional codable structure Contact. Below is a simplified version of my model: @Model class Customer { var name: String = "" var contact: Contact? init(name: String, contact: Contact? = nil) { self.name = name self.contact = contact } struct Contact: Codable, Equatable { var phone: String var email: String var allowSMS: Bool } } I'm trying to query all the Customers that have a contact with @Query. For example: @Query(filter: #Predicate<Customer> { customer in customer.contact != nil }) var customers: [Customer] However no matter how I set the predicate I always get an error: BugDemo crashed due to an uncaught exception NSInvalidArgumentException. Reason: keypath contact not found in entity Customer. How can I fix this so that I'm able to filter by contact not nil in my Model?

I’m an amateur developer working on a free utility for composers/producers, for which the macOS release needs to create and name RTP-MIDI sessions in Audio MIDI Setup from the command line (so I can ship a small C helper instead of telling users to click through the UI). Here’s what I’ve tried so far, without luck: • Plist hacks: Injecting entries into ~/Library/Audio/MIDI Configurations/*.mcfg works when AMS is closed, but AMS immediately locks and reverts my changes when it’s open. • CoreMIDI C API: I can create virtual ports with MIDISourceCreate, but attempting MIDIObjectGetDataProperty on the apple.midirtp.session plugin always returns err –10836. • Obj-C & Swift: Loading MIDINetworkSession and calling defaultSession, init, setNetworkName: and setting enabled = YES doesn’t produce a new session object in the Network panel. • dlopen/dlsym: I extracted the real CoreMIDI binary out of the dyld shared cache and tried binding _MIDINetworkSessionCreate, _SetName, _SetEnabled, etc., but all the symbols come back null or my tool segfaults. • Plugin registration: I’ve pulled the factory UUID (70C9C5EA-7C65-11D8-B317-000393A34B5A) from /System/Library/Extensions/AppleMIDIRTPDriver.plugin/Contents/Info.plist and called CFPlugInRegisterFactories, but it still never exposes the session-creation calls. At this point I’m convinced I’m either loading the wrong binary or missing one critical step in registering the RTP-MIDI plugin’s private API. Can anyone point me to: The exact path of the dylib or bundle that actually exports the MIDINetworkSessionCreate/MIDINetworkSessionSetName/MIDINetworkSessionSetEnabled symbols? A minimal working snippet (C or Obj-C) that reliably creates and names a Network-MIDI session? Any pointers, sample code, or even ideas about where Apple hides this functionality on macOS 15 would be hugely appreciated. Thanks!

Hello everyone, I think I've discovered a bug in JSONDecoder and I'd like to get a quick sanity-check on this, as well as hopefully some ideas to work around the issue. When attempting to decode a Decodable struct from JSON using JSONDecoder, the decoder throws an error when it encounters a dictionary that is keyed by an enum and somehow seems to think that the enum is an Array<Any>. Here's a minimal reproducible example: let jsonString = """ { "variations": { "plural": "tests", "singular": "test" } } """ struct Json: Codable { let variations: [VariationKind: String] } enum VariationKind: String, Codable, Hashable { case plural = "plural" case singular = "singular" } and then the actual decoding: let json = try JSONDecoder().decode( Json.self, from: jsonString.data(using: .utf8)! ) print(json) The expected result would of course be the following: Json( variations: [ VariationKind.plural: "tests", VariationKind.singular: "test" ] ) But the actual result is an error: Swift.DecodingError.typeMismatch( Swift.Array<Any>, Swift.DecodingError.Context( codingPath: [ CodingKeys(stringValue: "variations", intValue: nil) ], debugDescription: "Expected to decode Array<Any> but found a dictionary instead.", underlyingError: nil ) ) So basically, the JSONDecoder tries to decode Swift.Array<Any> but encounters a dictionary (duh), and I have no idea why this is happening. There are literally no arrays anywhere, neither in the actual JSON string, nor in any of the Codable structs. Curiously, if I change the dictionary from [VariationKind: String] to [String: String], everything works perfectly. So something about the enum seems to cause confusion in JSONDecoder. I've tried to fix this by implementing Decodable myself for VariationKind and using a singleValueContainer, but that causes exactly the same error. Am I crazy, or is that a bug?