After seveal years with Swift, I still find it hard to use the if case let or while case let, even worse with opotional pattern if case let x?.So, I would like to find an expression to "speak" case let more naturally.Presently, to be sure of what I do, I have to menatlly replace the if case by the full switch statement, with a single case and default ; pretty tedious.I thought of canMatch or canMatchUnwrap … with:So, following would readif case let x = y { // if canMatch x with yif case let x? = someOptional { // if canMatchUnwrap x with someOptionalwhile case let next? = node.next { // while canMatchUnwrap next with node.nextAm I the only one with such problem ? Have you found a better way ?

I submitted an iOS app with a watchOS companion app.App has been 'Metadata Rejected':Here is the full message:Guideline 2.1 - Information NeededWe have started the review of your app, but we are not able to continue because we need access to a video that demonstrates the current version of your app in use on a physical watchOS device.Please only include footage in your demo video of your app running on a physical watchOS device, and not on a simulator. It is acceptable to use a screen recorder to capture footage of your app in use.Next StepsTo help us proceed with the review of your app, please provide us with a link to a demo video in the App Review Information section of App Store Connect and reply to this message in Resolution Center.To provide a link to a demo video:- Log in to App Store Connect- Click on "My Apps"- Select your app- Click on the app version on the left side of the screen- Scroll down to "App Review Information"- Provide demo video access details in the "Notes" section- Once you've completed all changes, click the "Save" button at the top of the Version Information page.Please note that in the event that your app may only be reviewed by means of a demo video, you will be required to provide an updated demo video with every resubmission.Since your App Store Connect status is Metadata Rejected, we do NOT require a new binary. To revise the metadata, visit App Store Connect to select your app and revise the desired metadata values. Once you’ve completed all changes, reply to this message in Resolution Center and we will continue the review.I have 3 questions:- Is it a systematic requirement for Watch apps ? I did not see in guidelines ; or is it for some reason specific to my app or to the reviewer ?- How can I record video on the Apple Watch ? Should I film the watch while in operation and post this video ? Or is there a direct way to record the video from the watch to iPhone (using system tools, not third party).- I understand it is not video for publication on appstore, but video for tester. So should I include video in the screen captures section or put it on some web site and give a link to it to the tester ?

I propose that we collectively build a list of most wanted XCode features. Those pain points that do make our life more difficult with XCode or less fun.The goal would not be to have a scientifically correct ranking of all those, but simply:- make visible many ideas that have probably been reported in improvement requests- expose in short why that would be a great evolution, what pain point it would solve (functional improvements, not bugs correction)- if possible, discuss the feasibility of each idea.I would agree to update this original post to include new inputs.To avoid a thread where new posts get smaller and smaller in width, would be great to post each new idea as an answer to this original post. Of course discuss an idea as a reply to this idea post itself.Rule of the game would be tolerance, not trying to argue indefinitely on one idea. And be concise in wanted feature descriptionThe ultimate goal would be to influence positively XCode development team to consider the most wanted proposals.At least, have them explain us that one wanted feature in on the way (let's dream), why such idea is not so great, or why it would be too complex to implement…_________________________________Here is a first wanted feature, inspired from a thread in IB forum: https://forums.developer.apple.com/thread/72495Wanted Feature : Storyboard zoom when editing macOS appPain point: makes navigating in MacOS storyboard extremely painful if more than a few windows. Does limit the use of storyboards for MacOS App. The IB post was seen more than 7500 times, so that seems a largely shared concern.Feasibility: done for iOS, so should be possible for MacOS._________________________________Wanted Feature : Automatic/1-button icon, logo, screenshot, launch image generation for all project related devices/screens as mandated by ASC. Current with each new release.Pain point: The number of individually required image-based assets involved for meta data submittals became a burden long ago and continues to require significant labor to suss and satisfy.Feasibility: Xcode already does some of this w/launchStoryboards for new Swift projects, it just needs to be ubiquitous for all similar assets. It's just scripting/image resizing, which should not be a problem on macOS. Yes, I know there are 3rd party tools that help, but they seem to not keep up w/new devices/screen sizes - if they can do it, so can Xcode._________________________________Wanted Feature : More explicit help message when an action cannot be completed in IBPain point: When XCode cannot complete an action (e.g., create an IBOutlet for an IB object), option-cleaning the build folder solves the problem. Numerous issues reported on the forum were solved with this simple action. However, messages from IDE never mention this solution.Feasibility: Just adding (when appropriate) a suggestion in the message._________________________________Wanted Feature : When build fails, propose automatic correction action whenever possiblePain point: As an example, if some asset contains Finder information, a build error occurs, with message "resource fork, Finder information, or similar detritus not allowed Command /usr/bin/codesign failed with exit code 1". One has to go to Terminal, use xattr command and clean laboriously the offending files.Feasibility: As XCode has detected the files, it could propose to do the cleaning itself…- if it can be done with terminal command, so can Xcode._________________________________Wanted Feature : When an API is deprecated, get information on how to replace.Pain point: Most often, when an API is deprecated and we get a warning from compiler, we get no hint on how to replace. Thus, requiring to post on forum (a lot of posts relate to this search for information), search on web to find some hints… At the end losing time and not being sure to make the best decision.Feasibility: Those who deprecated API for sure know how to handle this. Should be (relatively) easy to provide information in doc, and in the deprecation message._________________________________Wanted Feature : When a string is missing for an infoPlist key, give a warning.Pain point: If the required key is missing, app will crash (or be rejected at Appstore verification stage which is a minor harm). I had the case where I called imagePicker, but intended to use only photo, not video. But if user taps on video, that caused a crash.Feasibility: When UIImagePickerControllerDelegate is used, compiler could check that infoPlist is defined for the required keys.._________________________________All comments welcomed.

Do you use third party framweworks, like Alamofire ?

I have an image to fill the entire screen, even behind the notch. So I set the Top margin to safe area to -44. That works OH on all iPhones… except on iPhone 12 ProMax simulator. Here I get a few pixels uncovered at top. I had to change value to -48 to get everything OK. So question is: has "notch area" which defines safe area increased 4 pixels on iPhone 12 Pro max ? If so, is it a hardware change ?

In this app I get access to QRCode. Reading works perfectly from the camera. Now I am struggling to get the image that was processed by the built in QRCode reader. I have found many hints on SO, but cannot make it work. Here is the code I have now. It is a bit long, I have to slit in 2 parts I looked at: // https://stackoverflow.com/questions/56088575/how-to-get-image-of-qr-code-after-scanning-in-swift-ios // https://stackoverflow.com/questions/37869963/how-to-use-avcapturephotooutput import UIKit import AVFoundation class ScannerViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate { &#9;&#9;fileprivate var captureSession: AVCaptureSession! // use for QRCode reading &#9;&#9;fileprivate var previewLayer: AVCaptureVideoPreviewLayer! &#9;&#9; &#9;&#9;// To get the image of the QRCode &#9;&#9;private var photoOutputQR: AVCapturePhotoOutput! &#9;&#9;private var isCapturing = false &#9;&#9; &#9;&#9;override func viewDidLoad() { &#9;&#9;&#9;&#9;super.viewDidLoad() &#9;&#9;&#9;&#9;var accessGranted = false &#9;&#9;&#9; //&#9;switch AVCaptureDevice.authorizationStatus(for: .video) { // HERE TEST FOR ACCESS RIGHT. WORKS OK ; // But is .video enough ? &#9;&#9;&#9;&#9;} &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;if !accessGranted {&#9;return } &#9;&#9;&#9;&#9;captureSession = AVCaptureSession() &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;photoOutputQR = AVCapturePhotoOutput() // IS IT THE RIGHT PLACE AND THE RIGHT THING TO DO ? &#9;&#9;&#9;&#9;captureSession.addOutput(photoOutputQR)&#9; // Goal is to capture an image of QRCode once acquisition is done &#9;&#9;&#9;&#9;guard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else { return } &#9;&#9;&#9;&#9;let videoInput: AVCaptureDeviceInput &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;do { &#9;&#9;&#9;&#9;&#9;&#9;videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice) &#9;&#9;&#9;&#9;} catch {&#9;return } &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;if (captureSession.canAddInput(videoInput)) { &#9;&#9;&#9;&#9;&#9;&#9;captureSession.addInput(videoInput) &#9;&#9;&#9;&#9;} else { &#9;&#9;&#9;&#9;&#9;&#9;failed() &#9;&#9;&#9;&#9;&#9;&#9;return &#9;&#9;&#9;&#9;} &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;let metadataOutput = AVCaptureMetadataOutput() &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;if (captureSession.canAddOutput(metadataOutput)) { &#9;&#9;&#9;&#9;&#9;&#9;captureSession.addOutput(metadataOutput) // SO I have 2 output in captureSession. IS IT RIGHT ? &#9;&#9;&#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;&#9;&#9;metadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main) &#9;&#9;&#9;&#9;&#9;&#9;metadataOutput.metadataObjectTypes = [.qr]&#9;// For QRCode video acquisition &#9;&#9;&#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;} else { &#9;&#9;&#9;&#9;&#9;&#9;failed() &#9;&#9;&#9;&#9;&#9;&#9;return &#9;&#9;&#9;&#9;} &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) &#9;&#9;&#9;&#9;previewLayer.frame = view.layer.bounds &#9;&#9;&#9;&#9;previewLayer.frame.origin.y += 40 &#9;&#9;&#9;&#9;previewLayer.frame.size.height -= 40 &#9;&#9;&#9;&#9;previewLayer.videoGravity = .resizeAspectFill &#9;&#9;&#9;&#9;view.layer.addSublayer(previewLayer) &#9;&#9;&#9;&#9;captureSession.startRunning() &#9;&#9;} &#9;&#9; &#9;&#9;override func viewWillAppear(_ animated: Bool) { &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;super.viewWillAppear(animated) &#9;&#9;&#9;&#9;if (captureSession?.isRunning == false) { &#9;&#9;&#9;&#9;&#9;&#9;captureSession.startRunning() &#9;&#9;&#9;&#9;} &#9;&#9;} &#9;&#9; &#9;&#9;override func viewWillDisappear(_ animated: Bool) { &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;super.viewWillDisappear(animated) &#9;&#9;&#9;&#9;if (captureSession?.isRunning == true) { &#9;&#9;&#9;&#9;&#9;&#9;captureSession.stopRunning() &#9;&#9;&#9;&#9;} &#9;&#9;} &#9;&#9; &#9;&#9;// MARK: - scan Results &#9;&#9; &#9;&#9;func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) { &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;captureSession.stopRunning() &#9;&#9;&#9;&#9; &#9;&#9;&#9;&#9;if let metadataObject = metadataObjects.first { &#9;&#9;&#9;&#9;&#9;&#9;guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return } &#9;&#9;&#9;&#9;&#9;&#9;guard let stringValue = readableObject.stringValue else { return } &#9;&#9;&#9;&#9;&#9;&#9;AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate)) &#9;&#9;&#9;&#9;&#9;&#9;found(code: stringValue) &#9;&#9;&#9;&#9;} &#9;&#9;&#9;&#9;// Get image - IS IT THE RIGHT PLACE TO DO IT ? &#9;&#9;&#9;&#9;// https://stackoverflow.com/questions/37869963/how-to-use-avcapturephotooutput &#9;&#9;&#9;&#9;print("Do I get here ?", isCapturing) &#9;&#9;&#9;&#9;let photoSettings = AVCapturePhotoSettings() &#9;&#9;&#9;&#9;let previewPixelType = photoSettings.availablePreviewPhotoPixelFormatTypes.first! &#9;&#9;&#9;&#9;print("previewPixelType", previewPixelType) &#9;&#9;&#9;&#9;let previewFormat = [kCVPixelBufferPixelFormatTypeKey as String: previewPixelType, &#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9; kCVPixelBufferWidthKey as String: 160, &#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9; kCVPixelBufferHeightKey as String: 160] &#9;&#9;&#9;&#9;photoSettings.previewPhotoFormat = previewFormat &#9;&#9;&#9;&#9;if !isCapturing { &#9;&#9;&#9;&#9;&#9;&#9;isCapturing = true &#9;&#9;&#9;&#9;&#9;&#9;photoOutputQR.capturePhoto(with: photoSettings, delegate: self) &#9;&#9;&#9;&#9;} &#9;&#9;&#9;&#9;dismiss(animated: true) &#9;&#9;} &#9;&#9; } extension ScannerViewController: AVCapturePhotoCaptureDelegate { &#9; &#9;&#9;func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) { &#9;&#9;&#9; &#9;&#9;&#9;&#9;isCapturing = false &#9;&#9;&#9;&#9;print("photo", photo, photo.fileDataRepresentation()) &#9;&#9;&#9;&#9;guard let imageData = photo.fileDataRepresentation() else { &#9;&#9;&#9;&#9;&#9;&#9;print("Error while generating image from photo capture data."); &#9;&#9;&#9;&#9;&#9;&#9;return &#9;&#9;&#9;&#9;} &#9;&#9; } } I get the following print on console Clearly photo is not loaded properly Do I get here ? false previewPixelType 875704422 photo <AVCapturePhoto: 0x281973a20 pts:nan 1/1 settings:uid:3 photo:{0x0} time:nan-nan> nil Error while generating image from photo capture data.

I suspect this point has been discussed in length, but I would like to find some reference to the design logic behind some Swift key aspect : the assignment operator, by value or reference. We know well how = works, depending it deals with reference or value (knowing the consequence of misuse) and the difference between the 2 : class AClass { var val: Int = 0 } struct AStruct { var val : Int = 0 } let aClass = AClass() let bClass = aClass bClass.val += 10 print("aClass.val", aClass.val, "bClass.val", bClass.val) let aStruct = AStruct() var bStruct = aStruct bStruct.val += 10 print("aStruct.val", aStruct.val, "bStruct.val", bStruct.val) Hence my question. Was it ever considered to have 2 operators, one used to assign reference and the other to assign value? Imagine we have : = operator when dealing with references := operator when dealing with content. Then let bClass = aClass would remain unchanged. But var bStruct = aStruct would not be valid anymore, with a compiler warning to replace by var bStruct := aStruct On the other end, we could now write let bClass := aClass to create a new instance and assign another instance content, equivalent to convenience initialiser class AClass { var val: Int = 0 init(with aVar: AClass) { self.val = aVar.val } init() { } } called as let cClass = AClass(with: aClass) But the 2 operators would have made it clear that when using = we copy the reference. When using := we copy content. I do think there is a strong rationale behind the present design choice (side effects I do not see ?), but I would appreciate to better understand which.

We have been waiting for this for many years. And the icon is there, at the right most That's a GREAT plus for the forum.

The Code Block doesn't number lines anymore. The work around is to ask for Numbered list in addition to Code block. Just applying Code Block: required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) commonInit() } Code Block AND Numbered List (or the other order) 1. required init?(coder aDecoder: NSCoder) { 2. super.init(coder: aDecoder) 3. commonInit() 4. } Is there another way to get numbering directly ?

In this app, I have: a VC as entry point (root) which segues (push) to a SplitViewController On iPad, when I get into the splitView, I can get back to the root by dragging down the split view. But on iPhone, this does not work: even though presentation is .automatic, Splitview covers all screen. No way to get back. I tried to create a back button in the detail views… Could not get it. What is the best way to do this ? is there a setup for the initial segue or the views presentation modes to allow pop back ? can I add a back button ? Where, calling what action to return ? I cannot embed splitViewController in nav stack … I would like to have the same solution on both iPhone and iPad…

In the new version of download > More, there doesn't seem to be a way to filter search efficiently. I searched for instance for MacOS (to see all releases). I get a very long list (200+) references, with a lot of Xcode, but nothing specific to MacOS. If I search for Xcode 11, I get all Xcode references: I added quotes to try and force an exact search, I just get a Java extension… That was not the case in the previous version of the more page. Or do I miss something ?

Even though I have selected all the notification options in my profile, I do not receive any mail (since about a week), at least when an answer is marked as correct. I did check they are not in spam. What do I miss ?

How to reorder a pdf document? move page p after page n, or at a given m position. add new page at certain position rotate a page 90° or 180°. I've seen libraries, but I would prefer to redevelop those simple functions directly in an iOS app (Swift). I don't need to edit the document content, just rearrange.

I try to rotate a page 180° in a pdf file. I nearly get it, but the page is also mirrored horizontally. Some images to illustrate: Initial page: Result after rotation (see code): it is rotated 180° BUT mirrored horizontally as well: The expected result It is just as if it was rotated 180°, around the x axis of the page. And I would need to rotate 180° around z axis (perpendicular to the page). It is probably the result of writeContext!.scaleBy(x: 1, y: -1) I have tried a lot of changes for transform, translate, scale parameters, including removing calls to some of them, to no avail. @IBAction func createNewPDF(_ sender: UIButton) { var originalPdfDocument: CGPDFDocument! let urls = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask) let documentsDirectory = urls[0] // read some pdf from bundle for test if let path = Bundle.main.path(forResource: "Test", ofType: "pdf"), let pdf = CGPDFDocument(URL(fileURLWithPath: path) as CFURL) { originalPdfDocument = pdf } else { return } // create new pdf let modifiedPdfURL = documentsDirectory.appendingPathComponent("Modified.pdf") guard let page = originalPdfDocument.page(at: 1) else { return } // Starts at page 1 var mediaBox: CGRect = page.getBoxRect(CGPDFBox.mediaBox) // mediabox which will set the height and width of page let writeContext = CGContext(modifiedPdfURL as CFURL, mediaBox: &mediaBox, nil) // get the context var pageRect: CGRect = page.getBoxRect(CGPDFBox.mediaBox) // get the page rect writeContext!.beginPage(mediaBox: &pageRect) let m = page.getDrawingTransform(.mediaBox, rect: mediaBox, rotate: 0, preserveAspectRatio: true) // Because of rotate 0, no effect ; changed rotate to 180, then get an empty page writeContext!.translateBy(x: 0, y: pageRect.size.height) writeContext!.scaleBy(x: 1, y: -1) writeContext!.concatenate(m) writeContext!.clip(to: pageRect) writeContext!.drawPDFPage(page) // draw content in page writeContext!.endPage() // end the current page writeContext!.closePDF() } Note: This is a follow up of a previous thread, https://developer.apple.com/forums/thread/688436

I use UIActivityViewController to airDrop pdfFile (pdfURL) from iPhone to iMac. Works well, file is airDropped. let activityVC = UIActivityViewController(activityItems: [pdfURL], applicationActivities: nil) present(activityVC, animated: true, completion: nil) I want to customise it: limit services to AIrDrop and mail How can I exclude such services as WhatsApp, Notes… ? perform some action once the file has completed airDrop or once cancelled. I tried to implement with completionWithItemsHandler:         activityVC.completionWithItemsHandler = { (activity, success, items, error) in             print("Completed")         } This doesn't work, print is not executed. My ultimate goal is to close the activityVC automatically once action was completed, without need to tap close button. Should I define some content for applicationActivities ?