Below is a quick snippet of where I record audio. I would like to get a sampling of the background audio so that later I can filter out background noise. I figure 10 to 15 seconds should be a good amount of time. Although I am assuming that it can change depending on the iOS device, the format returned from .inputFormat is : <AVAudioFormat 0x600003e8d9a0: 1 ch, 48000 Hz, Float32> Based on the format info, is it possible to make bufferSize for .installTap be just the write size for whatever time I wish to record for? I realize I can create a timer for 10 seconds, stop recording, paster the files I have together, etc. etc. But if I can avoid all that extra coding it would be nice. let node = audioEngine.inputNode let recordingFormat = node.inputFormat(forBus: 0) makeFile(format: recordingFormat) node.installTap(onBus: 0, bufferSize: 8192, format: recordingFormat, block: { [self] (buffer, _) in audioMetering(buffer: buffer) print ("\(self.averagePowerForChannel0) \(self.averagePowerForChannel1)") if self.averagePowerForChannel0 < -50 && self.averagePowerForChannel1 < -50 { ... } else { ... } do { ... write audio file } catch {return};}) audioEngine.prepare() do { try audioEngine.start() } catch let error { print ("oh catch \(error)") }

Currently I am placing a UITableView inside my UIViewController, with multiple other items. I am not using a UITableViewController. However I am unable to register the identifier "masterlist", or should I say I am not sure where I can register it. I am not using storyboard, and if I am still to register it in my UIViewController's viewDidLoad, I am unable to figure out the proper syntax. Is this something I can do? class BeginNewCustomer: UIViewController { let myList = createTblView() override func viewDidLoad() { super.viewDidLoad() myList.delegate = self myList.dataSource = self } func createTblView() -> UITableView { let myTable = MyTableView(frame: CGRect(x: 0, y: 0, width: 0, height: 0 )) myTable.backgroundColor = .white return myTable } extension BeginNewInv: UITableViewDelegate, UITableViewDataSource { func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return dbClass.invsList.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = UITableViewCell() // let cell = tableView.dequeueReusableCell(withIdentifier: "masterlist", for: indexPath) var config = cell.defaultContentConfiguration() .... fill the configuration cell.contentConfiguration = config return cell } }

Am trying to port away from .textLabel.text, as per Apple but I can't seem to find the way to get the text I set. I now set my cells this way: let cell = UITableViewCell() var config = cell.defaultContentConfiguration() config.text = dbClass.nameList[indexPath.row].clientName config.textProperties.color = .black config.textProperties.alignment = .center cell.contentConfiguration = config But when I try to get the text of a selected cell (once the user hits the OK button) I can't seem to reverse engineer how to get the text. let cell = myClientList.cellForRow(at: myInvsList.indexPathForSelectedRow!) let config = cell?.contentConfiguration dbClass.curMasterinvList = ?????? (can't find what property to read here I even tried let config = cell?.defaultContentConfiguration() Hoping that the text would be in there, but the text there is blank, so am assuming that's just the standard config before I've changed it. I have Googled as much as possible, but can't seem to find this very simple need.

I am using the code below to create my own debug log for my app. On the simulator, I have no problem viewing that log. I simply print out the documents directory in the debugger, then open it in my finder. However I do not know how to access the created log on my iPhone itself. Even if I go to Window -> Devices and Simulator's, when I look at my app's container it's empty. Although I would like to be able to access the file from any actual device in the future. Am I using the wrong directory? I even used allDomainsMask in place of userDomainMask below, but to no avail. debugFileURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("myApp.log") if let handle = try? FileHandle(forWritingTo: dbClass.debugFileURL!) { handle.seekToEndOfFile() // moving pointer to the end handle.write(text.data(using: .utf8)!) // adding content handle.closeFile() // closing the file } else { try! text.write(to: dbClass.debugFileURL!, atomically: false, encoding: .utf8) }

Updated info below, in bold. I went and changed one of the entities in the CoreData of my app. For all my entities I have them selected as "Manual" for Codegen So I deleted all four files (for two entities), cleaned the build folder, regenerated the CoreData files with Editor -> Create NSManagedObject Subclass. Now every time I run the app I get a fatalError in the following code in the AppDelegate: lazy var persistentContainer: NSPersistentContainer = { let container = NSPersistentContainer(name: “Invoice_Gen") container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { fatalError("Unresolved error \(error), \(error.userInfo)") } }) return container }() The error code being [error] error: addPersistentStoreWithType:configuration:URL:options:error: returned error NSCocoaErrorDomain (134140) Even if I remove the files for the CoreData entities, and comment out anything related to them code wise, I will still get this crash. If someone has any idea of whether I have to delete something else, or am whatever I would so appreciate it. This one has me more stumped than anything before it. The change I made was to turn one of the entities' attribute from String to Int When I changed it back, everything works. So from my research on Google there is something about the mapping model. But I can not find it at all.

_Posted this here, on Stackoverflow. But after 2+ weeks got only 10 views and no responses. _ I have my URLSession delegates working, but am curious about the order I get back response, data, and error. Right now am testing purposeful errors on my server side, so I can check the response if it's not 200. If it's not, I do not need to process the data, etc. So I could use a flag, but have to make sure that I'l always get response, data, and error in a specific order? Does such an order exist? extension UploadInv: UIDocumentPickerDelegate, URLSessionDataDelegate,URLSessionTaskDelegate, URLSessionDelegate { // Error received func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) { if let err = error { print("Error: \(err.localizedDescription)") } } // Response received func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive response: URLResponse, completionHandler: (URLSession.ResponseDisposition) -> Void) { completionHandler(URLSession.ResponseDisposition.allow) DispatchQueue.main.async { [self] in if let httpResponse = response as? HTTPURLResponse { if httpResponse.statusCode != 200 { DispatchQueue.main.async { [self] in self.myStatus.text = "Error \(String(httpResponse.statusCode))" myBackButt.isEnabled = true } } } } } // Data received func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) { DispatchQueue.main.async { [self] in

I posted a stupid question, because I make some of the stupidest typos in my programming. I just wish authors could delete questions/posts once we realize our silly typos.

This question is also, here, one StackOverflow. But it's only gotten 8 views, and I am stuck till I find out what am I doing wrong. I am able to create a URLSesion, build a request with a file to upload and successfully call it from my app. On my server side, the proper script is called, uploaded file is saved, etc,. However, I am not receiving the HTTP responses, data, etc. Actually had this working without the delegate, when the HTTP response functions were within the task itself. But am now trying to expand functionality and am missing something while trying implement the delegate. The trimmed code is below, and it all works, with the exception of setting up UIViewController as the URLSession delegate. Just trying to figure out why my UIViewController is not receiving the HTTP responses. Below is the code for: UIViewController Class which creates the upload session (UploadService) Extension for UIViewController which I want to use to process the responses How the previous task looked, when it worked. Before I tried to implement the delegate. UIViewController class UploadInv : UIViewController { var xFile : XFile? ...create UI.... let uploadService = UploadService() lazy var uploadSession: URLSession = { let configuration = URLSessionConfiguration.default return URLSession(configuration: configuration, delegate: self, delegateQueue: .main) }() override func viewWillAppear(_ animated: Bool) { ... } override func viewDidLoad() { super.viewDidLoad() uploadService.uploadSession = uploadSession ... code the lays out all buttons, labels, etc... } @objc func buttonAction(sender: UIButton!) { guard let theButton = sender else { return} let myTag = theButton.tag switch myTag { //button to start upload case ButtType.up.rawValue: uploadService.start(upFile: xFile!, script: "uploadOrig.pl", upLoadInvClass: self) uploadService.task?.resume() //button to select file to upload case ButtType.file.rawValue: ... file xFile with file info } } UploadService class UploadService { var task: URLSessionUploadTask? var uploadSession = URLSession.shared func start(upFile: XFile, script: String, upLoadInvClass: UploadInv) { var request = upFile.makeUrlReq(upFile: upFile, script: script) self.task = uploadSession.uploadTask(with: request, from: request.httpBody! ) } } extension extension UploadInv: UIDocumentPickerDelegate, URLSessionDelegate { func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) { ... file xFile info for upload .... ... http request created .... } // Below are the three simple functions which I would handle // responses the server, but these never seem to get called. func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) { if let err = error { print("Error: \(err.localizedDescription)") } } func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive response: URLResponse, completionHandler: (URLSession.ResponseDisposition) -> Void) { print("didReceive response") completionHandler(URLSession.ResponseDisposition.allow) } func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) { print("didReceive data") if let responseText = String(data: data, encoding: .utf8) { print(responseText) } } } Pre-Delegate model which worked class UploadService { var uploadSession = URLSession.shared func start(upFile: XFile, script: String, upLoadInvClass: UploadInv) { var request = upFile.makeUrlReq(upFile: upFile, script: script) uploadSession.uploadTask(with: request, from: request.httpBody ) { (data, response, error) in if let response = response { upLoadInvClass.upResp(resp: response) } if let error = error { upLoadInvClass.upErr(error: error) } if let data = data { upLoadInvClass.upData(data: data) } }.resume() } }

From a tutorial I pulled the extension below to allow the enduser to select a file off of the iPhone's storage system. Everything works fine. However I noticed that in the delegate that "dismiss" is only being called if the user chooses cancel. While the view does disappear when a file is selected, I am not sure that the view is being properly dismissed internally by Swift. Since I do call present, am I responsible for dismissing it when the user chooses a file as well? let supportedTypes: [UTType] = [UTType.item] let pickerViewController = UIDocumentPickerViewController(forOpeningContentTypes: supportedTypes) pickerViewController.delegate = self pickerViewController.allowsMultipleSelection = false present(pickerViewController, animated: true, completion: nil) extension uploadFile: UIDocumentPickerDelegate { func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) { for url in urls { guard url.startAccessingSecurityScopedResource() else { print ("error") return } ...save chosen file url here in an existing structre do { url.stopAccessingSecurityScopedResource() } } } func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) { controller.dismiss(animated: true, completion: nil) } }

I have the following structure : struct XFile : Codable { ...variables here init(fileUrl: URL, key: String) { ... } Then in another class I am trying the following: class UploadTask { var xfile: XFile var inProgress = false init(file: URL) { xFile = XFile(fileUrl: file, key: "filename") } } If typed as above Xcode gives me the following error: Cannot find 'xFile' in scope If I remove the xFile= part, Xcode give me the following warning and error: Result of 'XFile' initializer is unused Return from initializer without initializing all stored properties Obviously I am breaking some rule, just not sure what it is.

I realize I could declare a global var, such as: var mySpecialSubClass : MySpecialSubClass? ..and then check if it is defined. Don't know of any reason to do one way or another, but I was wondering if there was a search for an instance of "MySpecialSubClass" function or method available?

Can I have multiple extensions for the same class? Obviously I have already tried it and it works. But that doesn't make it right? So want to make sure this doesn't blowup in my face at a later date. p.s I keep typing "blow-up" as two separate words but the size changes the b word to "****" what's up with that?

Yes, still learning Swift, and no, am not lazy, but I do have some sort of reading problem. In code block below, what do the < and > represent? let requestedComponents: Set<Calendar.Component> = [ .year, .month, .day, .hour, .minute, .second ]

Am trying to add a file uploader to my iPhone app in Swift, and need help as am unsure how to save the data from returned from the UIDocumentPickerViewController. My whole document picking code works, and ends with this line of code: let data = try Data.init(contentsOf: url) The thing is I don't do my uploading till the user clicks another button, so I need to save that data. but am unsure how to cast a variable to hold it, then release the original data, and then finally free the copy. I thought this would work var dataToSend : AnyObject? but it doesn't Yes, still have casting issues to learn in Swift

Xcode 13.3 Whenever I hit enter on Xcode, it starts off the new line with an indentation. It doesn't matter if I am creating a new line, or moving lines down, it always start the new line, or the moved line with an indentation. This happens when I have: Prefer Indent Using set to Tabs regardless if I have Syntax-Aware Indenting: Return checked or unchecked Any thoughts? Update, now somehow it does that auto indent on every line no matter whether I set it tabs or spaces. It's as if I broke it. Very annoying, please help!