Is it possible to monitor the accelerometer or gyroscope when running in the background? My goal is to develop an app that detects sudden accelerations, like if the user fell down stairs, or was in a car accident. Thanks, Frank

Hi,The UIWebView class has a convenient property called scalesPageToFit, which can be used to allow small web pages to scale automatically to fit the frame of the web view.But this class is now deprecated in favor of WKWebView, which doesn't seem to have an equivalent property. How do I get the same functionality with WKWebView?Thanks,Frank

Hi,I've been unable to upload a build for the last several hours. Xcode spins for a while on "Fetching list of teams from the Developer Portal..." and then reports "The request timed out".This is not a new app or a new account; I've uploaded about 70 previous builds.Frank

Hi,Usually when you create a new class or other file in Xcode, the default location of the new file is a folder with the same name as your project.Somehow, I've ended up with a project where the default location for new files is the folder above this (the one with the .xcodeproj file in it). I can certainly change the folder whenever I make a new file, if I remember to do it, but often I forget, and end up with half my files in one place and half in the other.What controls this default, and how can I change it back to the folder I want?Thanks.

Xcode won't remember my Git credentials if I close and re-open it. It remembers them while Xcode is running, but always asks me again whenever I shut it down and reopen it. My Git repository is hosted with Beanstalk, which is not one of the ones listed in the drop-down list in Xcode. I have saved my credentials with Git on the command line and I'm able to do Git command line operations without re-entering them, but Xcode doesn't seem to recognize this. I'm really getting tired of retyping my password all the time. What else can I do?

Hi,I'm working with subscriptions.How do I know when a subscription expires, or is cancelled by the user? Does Apple push this information to my app automatically, or do I have to execute a command such as SKReceiptRefreshRequest or restoreCompletedTransactions?What is the difference between requesting a receipt refresh and restoring completed transactions?Thanks,Frank

I'm trying to figure out the right way to format a Decimal number as a currency value in Swift. For example, if the Decimal contains the value 25.1 I'd want this to print as "$25.10". If it had the value 25, I'd want "$25.00". If it happened to contain a value like 25.4575, I'd want to round it off and display "$25.46". There are a confusing amount of functions surrounding Decimals and string formatting. I know I can't just use String(format: "%.2f", value) like I can do with floats and doubles. There appears to be a new FormatStyle property of Decimal, but I can't use that yet because it requires iOS 15. Thanks, Frank

I need to do something that seems simple but I can't figure out the right syntax. Given a string, I need to search for the first occurrence of a substring (not a character). If found, I need to create a new string by removing the part of the old string that is before the substring. I can't see how this is done in Swift. There is a "firstIndexOf" function, but it only searches for one character at a time. I also know that there is a "range(of:)" function, but I can't find its documentation, and I don't know what the return type is, or how I would use it. Thanks, Frank

Hi, I'm looking at the function activityViewController(_:dataTypeIdentifierForActivityType:) in the UIActivityItemSource protocol. The documentation says "For items that are provided as data, returns the UTI for the item." The return type of the function is a String. I don't know what "UTI" means in this context. The data I'm trying to provide is an HTML document (a string containing HTML). I tried returning "text/html", but I don't think this worked. I'm also unsure whether my "itemForActivityType" function ought to be providing the HTML as a String, or perhaps converting it to Data first. The end result I'm seeing is that I can share the HTML document via Mail, and it looks fine, but if I try to air drop it, I get an error that says "Extension request contains input items but the extension point does not specify a set of allowed payload classes." I'd like my app to be able to share the HTML document via Mail or Airdrop. I don't care if it doesn't support sharing to any other services. Thanks, Frank

I have an app that I distribute to an Enterprise customer via private app store distribution. Recently, I published an update. The update went through the App Store review process, was approved, and is currently listed as Ready for Sale. However, my Enterprise customer says he cannot access the update. His view of the app still shows the latest version as being the prior version. I can't figure out what is wrong. Is there some additional step I need to take to make sure the app is available to him? Thanks, Frank

I'm trying to send my app silent push notifications by setting the "content-available" flag to 1 in the notification payload. This works, but there is a problem: if my app is not running in the foreground, the notification is visible on the home screen. I don't want this: I just want the app to see it, without waking up the screen or alerting the user. If the app is open when the notification comes in, it works as expected; I receive the notification inside my app, and iOS does not display any alert or banner. I configured my app with the "Remote Notifications" background mode. What am I doing wrong?

Hi,According to the documentation for the AVVideoCompositing protocol:"When creating instances of custom video compositors, AV Foundation initializes them by calling init and then makes them available as the value of the customVideoCompositor property of the object to which it was assigned. You then can do any additional setup or configuration to the custom compositor."AVMutableVideoComposition has a customVideoCompositorClass property, but does not have a customVideoCompositor property.Am I misunderstanding this? I need to access the instance to set some properties on it, but I cannot.Thanks,Frank

Hi, I'm working with a BLE device manufacturer on a new device for which I'm tasked with developing the iOS app. The hardware developer told me: "In response to a Scan request (from a phone or other device) the BLE stack is configured to include a device identifier". The device identifier is something I need to see in the advertising packet before I connect to the device. I don't know what a "Scan request" is. Is this something I have to specifically ask for in my app? Is it something iOS does automatically? Thanks, Frank

Is there any way to get Xcode to remember my Git credentials? My company uses a service called Beanstalk to host our Git repositories. Beanstalk is not one of the choices available under "Source Control Accounts", but the repository itself is a standard Git repository. I can access it by giving my credentials at the time I pull or push, but Xcode forgets them whenever I close it.

I've got a fairly old app that I first built back in 2014, and have been maintaining over the years. One of the screens in the app uses the camera to scan barcodes. The barcodes we scan are printed on labels, and are in the org.iso.Code128 format. When the app was first developed, I simply set the metadataObjectTypes property of AVCaptureMetadataOutput to all available types. This worked fine. The app scanned our barcodes very quickly with almost no issues. In 2017, we started seeing issues where barcode scanning was becoming slower. I reasoned that having it configured to scan for every possible barcode format might be the issue, so I went in and changed the code to have it scan only for the org.iso.Code128 format. This helped, for a while. Now, we're seeing the problem again in iOS 14 devices. On some devices it is nearly impossible to scan the barcodes. On others, you have to wait 20 or 30 seconds before the barcode is recognized. What could be causing this issue?