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Access essential data types, collections, and operating-system services to define the base layer of functionality for your app using Foundation.

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First of all, I decided to make my project with only UIKit. So I deleted 'Main' storyboard, Info.plist->Storyboard name, and Main storyboard file base name->Main. And I edited SceneDelegate. So now I can display the single viewControllers, but when I try to set 'UITabBarController' to rootViewController, It cause this error(title). I tried to make UITabBarController in ViewController, UITabBarController in SceneDelegate and some more. // BackgroundViewController for the rootViewController import UIKit class BackgroundViewController: UIViewController { let backgroundTabBarController = UITabBarController() override func viewDidLoad() { super.viewDidLoad() view.backgroundColor = .white createTabBar() } } extension BackgroundViewController { private func createTabBar() { view.backgroundColor = .white view.addSubview(backgroundTabBarController.view) let firstViewController = BookSearchViewController() let secondViewController = MainViewController() let thirdViewController = UserStatusViewController() let lastViewController = OrderViewController() firstViewController.tabBarItem = UITabBarItem(title: "Search", image: UIImage(systemName: "magnifyingglass.circle.fill"), selectedImage: UIImage(systemName: "magnifyingglass.circle")) secondViewController.tabBarItem = UITabBarItem(title: "Main", image: UIImage(systemName: "house.fill"), selectedImage: UIImage(systemName: "house")) thirdViewController.tabBarItem = UITabBarItem(title: "My", image: UIImage(systemName: "person.fill"), selectedImage: UIImage(systemName: "person")) lastViewController.tabBarItem = UITabBarItem(title: "Order", image: UIImage(systemName: "menucard.fill"), selectedImage: UIImage(systemName: "menucard")) backgroundTabBarController.viewControllers = [firstViewController, secondViewController, thirdViewController, lastViewController] backgroundTabBarController.selectedViewController = secondViewController } } // SceneDelegate import UIKit class SceneDelegate: UIResponder, UIWindowSceneDelegate { var window: UIWindow? func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { guard let windowScene = (scene as? UIWindowScene) else { return } window = UIWindow(windowScene: windowScene) window?.rootViewController = BackgroundViewController() window?.makeKeyAndVisible() } } // Error code Thread 1: "Could not find a storyboard named 'Main' in bundle NSBundle </Users/[MyDesktopName]/Library/Developer/CoreSimulator/Devices/[ApplicationName]/data/Containers/Bundle/Application/[ApplicationName]/BTY.app> (loaded)" But anyone of this solve the problem. How can I make UITabBarController to rootViewController? Make UITabBarController in SceneDelegate Make new UIViewController that have UITabBarController and set to rootViewController Set ViewControllers with 'UINavigationController(rootViewController:)' Present UITabBarController from other viewController
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by J_ROLF.
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We use UserDefaults in our app to identify if we already showed a particular UI to the user (so that it will not be shown to the user again). Our logic goes something like: if !UserDefaults.standard.alreadyShownToUser { showUI() UserDefaults.standard.alreadyShownToUser = true } But there are users who see this particular screen again when they open the app. The screen does not show up for a few days, and then suddenly, it shows up again. Our theory is that this might have something to do with iOS Prewarming. So we updated our code to add another check: if UIApplication.shared.isProtectedDataAvailable && !UserDefaults.standard.alreadyShownToUser However, it does NOT seem to work / mitigate the issue at all. We also added logs to check the value of UIApplication.shared.isProtectedDataAvailable and the value of the UserDefaults variable. We expected that if: UIApplication.shared.isProtectedDataAvailable is false, then the UserDefaults value should also be false. But in our logs, we can see that UIApplication.shared.isProtectedDataAvailable is false, but UserDefaults still returned true. Which led me to think that UserDefaults is not affected by Prewarming. Now, I'm back from the start. What's causing our UserDefaults to have different value? We also do not have anywhere else in the app that sets the value of UserDefaults.standard.alreadyShownToUser to false. The only time it should have that value is when the user installs the app for the first time. I appreciate any help that can lead me to fix this issue. Thank you!
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by JennEve.
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i have a save function: func save(){ if let encoded = try? JSONEncoder().encode(routes) { UserDefaults.standard.set(encoded, forKey: saveKey) } } and an init function: init() { if let data = UserDefaults.standard.data(forKey: saveKey){ print(data.base64EncodedString) if let decoded = try? JSONDecoder().decode([RouteObject].self, from: data) { routes = decoded return } } routes = [] } onload this initiation there is no data. but 3382 bytes how get I the content form data? i don't know where the error is? debug is not possible I did get the info
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I use UserDefaults to store a variety of user data / preferences. Recently, I have started getting somewhat frequent complaints from users that their settings have been reset. There doesn't appear to be a rhyme or reason to the issue (some users have all of their data reset just once, while others are seeing that one of their settings resets very frequently). I haven't been able to pinpoint what the root cause is, but I figure that it must have something to do with UserDefaults (either all of it or only certain keys) somehow getting erased. As I figure out the root cause, I figure that a good solution in the meantime is to backup UserDefaults in some way (e.g. perhaps to iCloud?). Is there a standard / best-practice way of doing this?
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I have a file named ä.txt (with German umlaut) on my FTP server. I select it like this: let openPanel = NSOpenPanel() openPanel.runModal() let source = openPanel.urls[0] Running this code unexpectedly throws an error: do { print(try source.checkResourceIsReachable()) } catch { print(error) // Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory” } Manipulating the URL also seems to change the underlying characters: print(source) // file:///Volumes/abc.com/httpdocs/%C3%A4.txt print(URL(fileURLWithPath: source.path)) // file:///Volumes/abc.com/httpdocs/a%CC%88.txt Note that both variants of the URL above also throw the same error when running URL.checkResourceIsReachable(). If I download the file to my Mac, then both variants print file:///Users/me/Downloads/a%CC%88.txt and neither of them throws an error when running URL.checkResourceIsReachable(). What is the problem? How can I correctly access this file on the FTP server?
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by Nickkk.
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I'm developing iOS framework with Objective C. I create a dispatch_queue_t by using dispatch_queue_create. And call CFRunLoopRun() for run the Runloop in the queue. But, It looks like the dispatch_queue_t has share the RunLoop. Some classes has add an invalid timer, and when I call the CFRunLoopRun(), It crashed on my side. Sample code: - (void)viewDidLoad { [super viewDidLoad]; self.queue1 = dispatch_queue_create("com.queue1", DISPATCH_QUEUE_CONCURRENT); self.queue2 = dispatch_queue_create("org.queue2", DISPATCH_QUEUE_CONCURRENT); } - (IBAction)btnButtonAction:(id)sender { dispatch_async(self.queue1, ^{ NSString *runloop = [NSString stringWithFormat:@"%@", CFRunLoopGetCurrent()]; runloop = [runloop substringWithRange:NSMakeRange(0, 22)]; NSLog(@"Queue1 %p run: %@", self.queue1, runloop); //NSTimer *timer = [[NSTimer alloc] initWithFireDate:[NSDate date] interval:1 target:self selector:@selector(wrongSeletor:) userInfo:nil repeats:NO]; //[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes]; }); dispatch_async(self.queue2, ^{ NSString *runloop = [NSString stringWithFormat:@"%@", CFRunLoopGetCurrent()]; runloop = [runloop substringWithRange:NSMakeRange(0, 22)]; NSLog(@"Queue2 %p run: %@", self.queue2, runloop); CFRunLoopRun(); }); } Some time they take same RunLoop: https://i.stack.imgur.com/wGcv3.png ===== You can see the crash by uncomment the code of NSTimer. The NSTimer has been added in queue1, but it still running when call CFRunLoopRun() in queue2. I have read some description like: https://stackoverflow.com/questions/38000727/need-some-clarifications-about-dispatch-queue-thread-and-nsrunloop They told that: "system creates a run loop for the thread". But, in my check, they are sharing the RunLoop. This is sad for me, because I facing that crashes happen when calling CFRunLoopRun() on production. Can someone take a look at this.
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by ninh.asus.
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how could I remove the key NSMotionUsageDescription? cause it leads some crash problem.But after I remove the key NSMotionUsageDescription, I submit to Apple Store connect,I will receive issue .TMS-90683: Missing purpose string in Info.plist - Your app’s code references one or more APIs that access sensitive user data, or the app has one or more entitlements that permit such access. The Info.plist file for the “ydbus.app” bundle should contain a NSMotionUsageDescription key with a user-facing purpose string explaining clearly and completely why your app needs the data. If you’re using external libraries or SDKs, they may reference APIs that require a purpose string. While your app might not use these APIs, a purpose string is still required. For details, visit: https://developer.apple.com/documentation/uikit/protecting_the_user_s_privacy/requesting_access_to_protected_resources. How could I solve the problem? I reviewed my project,I don't use the key NSMotionUsageDescription api.
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I'm getting the following error @main: Thread 1: EXC_BREAKPOINT (code=1, subcode=0x1886cdcf8). It occurs about every other time someone attempts to log in to the app. Also I cannot replicate this issue on the simulator -- only on physical devices.
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Date/Time: 2024-04-11 09:58:14.2802 +0700 OS Version: macOS 14.4.1 (23E224) Report Version: 12 Anonymous UUID: BA4FE8B2-6345-D8DE-06FA-E30E32E93161 Time Awake Since Boot: 240 seconds System Integrity Protection: disabled Crashed Thread: 1 Exception Type: EXC_BAD_ACCESS (SIGABRT) Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000147d38000 Exception Codes: 0x0000000000000002, 0x0000000147d38000 Termination Reason: Namespace SIGNAL, Code 6 Abort trap: 6 Terminating Process: webstorm [1406] VM Region Info: 0x147d38000 is in 0x147d38000-0x147fa8000; bytes after start: 0 bytes before end: 2555903 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL VM_ALLOCATE 138270000-147d38000 [250.8M] ---/rwx SM=ZER ---> VM_ALLOCATE 147d38000-147fa8000 [ 2496K] rwx/rwx SM=ZER VM_ALLOCATE 147fa8000-1482c8000 [ 3200K] ---/rwx SM=ZER Application Specific Information: abort() called Thread 0:: main Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x193c0e170 semaphore_wait_trap + 8 1 libdispatch.dylib 0x193a9e984 _dispatch_sema4_wait + 28 2 libdispatch.dylib 0x193a9f034 dispatch_semaphore_wait_slow + 132 3 webstorm 0x104acd8a4 std::sync::mpmc::context::Context::wait_until::hd085b5c0fb806785 + 108 4 webstorm 0x104ad0004 std::sync::mpmc::context::Context::with::$u7b$$u7b$closure$u7d$$u7d$::hc590ed29f2494e42 + 92 5 webstorm 0x104adaf60 xplat_launcher::main_lib::hd64975b96fde8651 + 8084 6 webstorm 0x104a719f0 std::sys_common::backtrace::__rust_begin_short_backtrace::h9840a7ca047c81ed + 12 7 webstorm 0x104a71c90 main + 660 8 dyld 0x1938c60e0 start + 2360 more detail in acttached file
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by khoapv.
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I have an issue where performing a 'POST' request fails with a 400 when done on a device running iOS 16, but succeeds with a 200 on devices running iOS 17. I have not been able to find any explanations for this behavior. I've checked the request on both versions and it's identical in both versions of iOS, as far as I can tell. BodyStream : JSON object data Headers : Content-Type:application/json TimeoutInterval: 900
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I recently re-read Performing manual server trust authentication and noticed that it does not mention having to call SecTrustEvaluate (or its replacements) in client code (anymore). Is that implicitly taken care of by ATS?
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by jzilske.
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Hi all, Here I want to encode OrderedDictionary to JSON file, I use the JSONEncoder below: let encoder = JSONEncoder() encoder.outputFormatting = [.prettyPrinted, .withoutEscapingSlashes] and I declare variables qwe, asd and zxc: var qwe = OrderedDictionary<String, Int>() qwe["bbb"] = 12 qwe["ccc"] = 13 qwe["ddd"] = 14 qwe["bbc"] = 15 var asd = Dictionary<String, Int>() asd["bbb"] = 1 asd["ccc"] = 3 asd["ddd"] = 4 asd["bbc"] = 5 var zxc: KeyValuePairs<String, String> { return [ "zz": "zz", "aa": "aa", "bb": "bb", "cc": "cc", "bc": "bc", ] } After I do try encoder.encode(qwe).write(to: path ,options: .atomic) encoder.encode(asd).write(to: path ,options: .atomic) encoder.encode(zxc).write(to: path ,options: .atomic) the output JSON file format of OrderedDictionary isn't what I expected. The output JSON of OrderDictionary is like this: [ "bbb", 12, "ccc", 13, "ddd", 14, "bbc", 15 ] On the other hand, the output JSON of Dictionary and KeyValuePairs are normal, just with different order: Dictonary: { "ccc" : 3, "bbb" : 1, "bbc" : 5, "ddd" : 4 } KeyValuePairs: { "cc" : "cc", "aa" : "aa", "zz" : "zz", "bb" : "bb", "bc" : "bc" } I also Log these objects after I declare them, the Log show their structure are similar: qwe -> ["bbb": 12, "ccc": 13, "ddd": 14, "bbc": 15] asd -> ["ccc": 3, "bbb": 1, "bbc": 5, "ddd": 4] zxc -> ["zz": "zz", "aa": A"aa", "bb": "bb", "cc": "cc", "bc": "bc"] I thought the OrderedDictionary is similar to Dictionary, but does anyone know why the output of OrderedDictionary is not like this: {"bbb": 12, "ccc": 13, "ddd": 14, "bbc": 15} Or is there any other way I can customize the order of keys in my encoded JSON file? Thank you so much!
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It appears that when a class like the following: " class RoomCaptureViewController: UIViewController, RoomCaptureViewDelegate,ARSCNViewDelegate, MTKViewDelegate, ARSessionDelegate, RoomCaptureSessionDelegate. " has multiple delegates, the ordering of the priority of each message is delivered to a delegate by a priority sensitive order based algorithm and that one message can be processed by only one delegate and not passed off to other delegates if they don't have the proper entry points. Specifically I noted that changing the order seems to result in a delegate not getting a message that it should be seeing. Is there a "handoff" call that can be made after a delegate has seen a message but needs to pass it off to another delegate for processing? This is a protocol typically utilized in Interrupt handlers for PCIe and other messaging protocols and I have not been able to find a similar capability In the voluminous documentation available for IOS and Mac systems. I would also like to know how a message is dispatched by a class to the particular delegate for which the message was intended. Is there a detailed document that explains how the messaging protocol works that is not so fragmented as to require having multiple monitors open in order to form a coherent picture of the messaging interface for Delegates belonging to a class?
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by mfstanton.
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I have an app with IAP which uses a URLSession object to download files from a server. The download part of the code is: let request = URLRequest(url: fromURL, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: timeoutInterval) let (data, response) = try await downloadSession.data(for: request) This code has been working without trouble for over a year with thousands of downloads. Now I have a user with a new iPhone (iOS 17.3.1) which refuses to download, failing at the above code (judging by the high level logs). My question is this: What sort of things should we be looking at in order to diagnose this issue? So far we have done the following: He has no general download issue (eg Safari works fine) His network access is 'normal' and the problem persists when the network is changed (4G, wifi etc) He runs a VPN (Nord) but the problem persists when this is off He has no 3rd party AV software His phone is not in lockdown mode Any pointers would be appreciated! NB I have no physical access to his device (yet!)
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by Baylward.
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Hi, Is there any way to return cached URLSession response and then reload and return? I want show cached response while load last version of API call, and if reload works fine, show the latest version of response and in case os failure, show cached response (if exists) Thanks!
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I keep getting the nw_socket_handle_socket_event [C1.1.1:2] Socket SO_ERROR [61: Connection refused] when I am trying to enter the HabitDetailView and UserDetailView. The server gives the information for the Habit/User Collection View (/habits and /users), but it does not give any of the images, UserStats or Habit Stats. I've posted below how the APIRequest and APIService code looks like. It just has me stumped that it gives some of the info, but blocks other parts. API Request import UIKit protocol APIRequest { associatedtype Response var path: String { get } var queryItems: [URLQueryItem]? { get } var request: URLRequest { get } var postData: Data? { get } } extension APIRequest { var host: String { "localhost" } var port: Int { 8080 } } extension APIRequest { var queryItems: [URLQueryItem]? { nil } var postData: Data? { nil } } extension APIRequest { var request: URLRequest { var components = URLComponents() components.scheme = "http" components.host = host components.port = port components.path = path components.queryItems = queryItems var request = URLRequest(url: components.url!) if let data = postData { request.httpBody = data request.addValue("application/json", forHTTPHeaderField: "Content-Type") request.httpMethod = "POST" } return request } } API Service import UIKit struct HabitRequest: APIRequest { typealias Response = [String: Habit] var habitName: String var path: String { "/habits" } } struct UserRequest: APIRequest { typealias Response = [String: User] var path: String { "/users"} } struct HabitStatisticsRequest: APIRequest { typealias Response = [HabitStatistics] var habitNames: [String]? var path: String { "/habitStats"} var queryItems: [URLQueryItem]? { if let habitNames = habitNames { return [URLQueryItem(name: "names", value: habitNames.joined(separator: ","))] } else { return nil } } } struct UserStatisticsRequest: APIRequest { typealias Response = [UserStatistics] var userIDs: [String]? var path: String { "/userStats"} var queryItems: [URLQueryItem]? { if let userIDs = userIDs { return [URLQueryItem(name: "ids", value: userIDs.joined(separator: ","))] } else { return nil } } } struct HabitLeadStatisticsRequest: APIRequest { typealias Response = UserStatistics var userID: String var path: String { "/userLeadingStats" + userID} } struct ImageRequest: APIRequest { typealias Response = UIImage var imageID: String var path: String { "/images/" + imageID } } enum APIRequestError: Error { case itemsNotFound case requestFailed(HTTPURLResponse) } extension APIRequest where Response: Decodable { func send() async throws -&gt; Response { let (data, response) = try await URLSession.shared.data(for: request) guard let httpResponse = response as? HTTPURLResponse else { throw APIRequestError.requestFailed(HTTPURLResponse()) } guard httpResponse.statusCode == 200 else { throw APIRequestError.itemsNotFound } let decoder = JSONDecoder() let decoded = try decoder.decode(Response.self, from: data) return decoded } } enum ImageRequestError: Error { case couldNotIntializeFromData case imageDataMissing } extension APIRequest where Response == UIImage { func send() async throws -&gt; UIImage { let (data, response) = try await URLSession.shared.data(for: request) guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else { throw ImageRequestError.imageDataMissing } guard let image = UIImage(data: data) else { throw ImageRequestError.couldNotIntializeFromData } return image } }
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