Good morning Ladies and Gentleman, in my production app I noticed what I think is a bug when altering a view (For example triggering a toggle) if a UITextField is Focused at the moment the app will just crash. I m able to reproduce this error. Is this supposed to be so? Do I really need to defensive develop this? Basically I click on "AddCustomSource" and the textfield appears to add the custom source. If I click on cancel or trigger one of the toggle while this textfield has focus, the app will just crash. 100% reproducible. Here the error that the console shows: " *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Attempt to delete item containing first responder that refused to resign. First responder that was asked to resign (returned YES from -resignFirstResponder): <UITextField: 0x13411bc00; frame = (0 0; 290 22); opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0x600002d66880>; placeholder = NewspaperTitle; borderStyle = None; background = <UITextFieldNoBackgroundProvider: 0x6000021e5190: textfield=<UITextField 0x13411bc00>>; layer = <CALayer: 0x6000023568e0>> inside containing view: <SwiftUI.ListCollectionViewCell: 0x134151a00; baseClass = UICollectionViewListCell; frame = (20 82.6667; 358 44); clipsToBounds = YES; layer = <CALayer: 0x60000235d220>> at index path: <NSIndexPath: 0xae4395876dfb5f2e> {length = 2, path = 0 - 1} Current first responder: <TtGC7SwiftUI15CellHostingViewGVS_15ModifiedContentVS_14_ViewList_ViewVS_26CollectionViewCellModifier: 0x134152000; frame = (0 0; 358 44); autoresize = W+H; gestureRecognizers = <NSArray: 0x600002d62f70>; layer = <CALayer: 0x60000235dc20>> inside containing view: <SwiftUI.ListCollectionViewCell: 0x134151a00; baseClass = UICollectionViewListCell; frame = (20 82.6667; 358 44); clipsToBounds = YES; layer = <CALayer: 0x60000235d220>> at index path: <NSIndexPath: 0xae4395876dfb5f2e> {length = 2, path = 0 - 1}' terminating with uncaught exception of type NSException CoreSimulator 857.14 - Device: iPhone 14 Pro Max (9E3E3FA5-4FCC-47D7-9D91-E1E5E48286FE) - Runtime: iOS 16.2 (20C52) - DeviceType: iPhone 14 Pro Max " And here the code that leads to this behaviour: // ContentView.swift // BLE // // Created by Entwicklung Help Tech GmbH on 22.12.22. // import SwiftUI struct ContentView: View { @State var categories: [NewsSource] = [] @State var isEditing = false @State var newSourceName = "" var body: some View { VStack { List($categories, id:\.self ) { $category in Section { ForEach($category.sources, id: \.self ) { $source in Toggle(source.name, isOn: $source.active) .foregroundColor(Color.black) .accessibilityLabel(String(localized: "s")) .onChange(of: categories, perform: { newValue in }) .tint(Color.blue) if !isEditing { Button { [self] in withAnimation(.spring()) { isEditing.toggle() } } label: { HStack { Text(String(localized:"AddCustomSource")) } } } else { AddCell HStack { Button { [self] in withAnimation(.spring()) { //isFocused = false isEditing.toggle() } } label: { HStack { Text(String(localized: "Cancel")) } } Spacer() } } } } header: { Text(category.name) } } .padding() } .onAppear { for index in 1...10 { categories.append(NewsSource(name: "\(index)", feeds: [NewsFeed(name: "News feed \(index)", url: URL(string: "https://google.de")!, active: true)])) } } } @ViewBuilder var AddCell: some View { VStack { HStack { Button { [self] in if newSourceName != "" { withAnimation(.spring()) { isEditing.toggle() } } } label: { Image(systemName: "plus") .background(.green) .clipShape(Circle()) .foregroundColor(.white) .frame(width: 20.0, height: 20.0) } TextField(String(localized: "NewspaperTitle"),text: $newSourceName) .onSubmit { [self] in if newSourceName != ""{ newSourceName = "" withAnimation(.spring()) { isEditing.toggle() } } } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } struct NewsSource: Codable, Hashable, Identifiable, Equatable { var id: UUID { UUID() } var name: String var sources: [NewsFeed] init(name: String, feeds: [NewsFeed]) { self.name = name self.sources = feeds } init(from decoder: Decoder) throws { let container = try decoder.container(keyedBy: CodingKeys.self) self.name = try container.decode(String.self, forKey: .name) self.sources = try container.decode([NewsFeed].self, forKey: .sources) } func hash(into hasher: inout Hasher) { hasher.combine(name) } static func ==(lhs: NewsSource, rhs: NewsSource) -> Bool { return lhs.name == rhs.name && lhs.sources == rhs.sources } } struct Newspaper: Codable, Hashable { var categories : [NewsSource] } struct NewsFeed: Codable, Equatable, Hashable, Identifiable { var id: UUID? { UUID() } let name: String let url: URL var active: Bool var image: String? }

I'm working on an iOS app written in Swift and I want to be able to detect when USB flash drives are connected or disconnected from the device. I'm considering using the External Accessory framework to implement this feature, but I'm not sure where to start. Can anyone provide some guidance or point me to some resources that can help me implement this feature in my app? I'm particularly interested in examples or code snippets that demonstrate how to use the External Accessory framework to detect accessory connection and disconnection events. Any help would be greatly appreciated!