I need to test my app's in-app purchases and I am having a very difficult time with it. I created a "Sandbox" account in App Store connect. Doing so was very frustrating. It told me multiple times that my password was "too simple", without ever explaining what the password rules are. Then it emailed me something so I could "validate" the account. Luckily I used an actual email address that I can receive mail on. I was expecting I could use any fake address since this is a Sandbox account. After that I started an iOS simulator and tried to log in. It immediately asked me to turn on two-factor authentication. I declined, and then it just said "User name or password is incorrect". I tried a couple more times, then I went back and actually turned on the two factor auth. But that didn't solve the problem. I still cannot log in. Can someone explain what I'm doing wrong here?

I cannot get CMMotionActivityManager.startActivityUpdates() to work. I have given my app permission to use core motion and also put the required description key into my Info.plist file. I am expecting my user to walk. I call startActivityUpdates() and then stand up and start walking. I typically get about 3 callbacks within a couple of seconds, all of which have "false" set for all of the activity flags, even "unknown". Then after that I get nothing. I can't figure out what I could possibly be doing wrong here. The code is really simple. I looked at doezens of examples and my code is doing the exact same things.

I'm working on a screen where the goal is for the user to walk for 6 minutes while the app times them and measures the distance walked. I'm using CMPedometer to track the walking distance and a repeating 1-second Timer to count down the time. This works fine as long as the app is in the foreground, but I'd like my user to be able to lock their phone and put it away while they walk. I used UIApplication.shared.beginBackgroundTask, but it doesn't provide enough time. It usually only gives me around 30 seconds. I also tried calling UIApplication.shared.beginBackgroundTask again or calling it once every time the timer ticks, with no better result. How can I accomplish my goal here?

I'm not getting any values from the floorsAscended or floorsDescended properties of CMPedometerData. I tested it by walking up and down a flight of stairs twice while monitoring for pedometer updates for 60 seconds. I also queried for the pedometer data separately at the end of the time period in case there were any updates I missed. I'm using an iPhone 13 pro for my tests and I did check to make sure CMPedometer.isFloorCountingAvailable() is true, and I am getting other kinds of pedometer data such as distance, pace, and steps. Is there something else I need to do in order to enable floor counting? Thanks, Frank

I'm trying to use CMAcceleration data in my app to detect when the user is doing certain kinds of activities. The problem I'm having is that the acceleration data for the same user motions is different depending on how they are holding their phone. I don't care about the orientation of the phone, I just care about the overall motion of the person holding it. I've researched and tried a whole bunch of ways to correct the data for phone orientation, such as rotating the acceleration using the CMAttitude rotation matrix, removing the effect of gravity with a series of calculations, and doing both of these in both orders. I can't seem to come up with something that works. I think there has to be some solution since iOS can do things like step counting which I assume doesn't depend on the orientation of the phone. Thanks, Frank

My company did an app for a customer 10 years ago. The app has in-app purchases (not subscriptions). It is an Objective-C code base. Over the years we've done minor updates to this app in order to keep it in compliance, but no major overhaul. The app has been pretty reliable in the past, but recently my customer is getting a flood of complaints from users who say their in-app purchases disappear and can't be restored. It's happening too often to just be a case of bad internet connection or similar issue. The only thing that seems to be consistent is that it's never US-based users. Whenever I test this app using sandbox accounts, I cannot reproduce the problems that are being reported. I'm always able to make purchases and restore them after reinstalling the app, or restore them to a different device. The content associated with the purchases always downloads correctly, even if I intentionally interrupt and restore internet access. What can I do to figure this out? Should an IAP based app from 2014 be expected to work correctly today? Are there new legal issues with non-US app stores that we need to be aware of? I realize there isn't a lot to go on here, but I don't have any more information. Thanks, Frank

If I'm talking to a Bluetooth (BLE) device using the Core Bluetooth functions, and I need to send or receive multiple packets (such as if I need to communicate a large message) is it guaranteed that the packets will arrive in the same order they were sent?

I added this file as Apple requested due to my app using UserDefaults, but it still complains when I upload it. This is the message: TMS-91053: Missing API declaration - Your app’s code in the “Production” file references one or more APIs that require reasons, including the following API categories: NSPrivacyAccessedAPICategoryUserDefaults. And this is my file, what's wrong? <dict> <key>NSPrivacyAccessedAPITypes</key> <array> <dict> <key>NSPrivacyAccessedAPIType</key> <string>NSPrivacyAccessedAPICategoryUserDefaults</string> <key>NSPrivacyAccessedAPITypeReasons</key> <array> <string>CA92.1</string> </array> </dict> </array> </dict>

I have a new app that needs to be submitted for review this week. When I tried to submit it, I was told I could not do so because "Under the Digital Services Act, you must provide and verify information regarding your account". I am working on behalf of a large corporate customer. They are telling me that they cannot do anything without consulting their legal team, which is going to take time. In the meantime, they asked me if I could omit the European region from the app's distribution list. I tried this, but it did not work. I manage about 20 apps for different customers and I have never seen this requirement appear on any other account. Is it new? Does it only apply to certain kinds of accounts, or to new apps, or new accounts publishing their first app? If this is a European Union requirement, why is it needed if I don't distribute to EU countries? Thanks, Frank

I have a customer who wants to protect the REST API of their app with a private certificate. They would then distribute the client certificate to the authorized users. Their app would not work unless the client certificate is already installed on the user's phone before they run the app. I have never done this before. Is it possible to install a client certificate on an iPhone without running an app, for example if it were sent in an email message? And if it is possible, is App Review going to let such an app into the app store? Thanks, Frank

I have an extremely straightforward situation where an @IBOutlet in a ViewController is connected to a property in an XIB file. I've been working with iOS apps for more than ten years, and done this about a million times. For some reason, the property becomes nil at some point after the view is loaded. I can check with the debugger to see that it is not nil at viewDidLoad, and there is nothing in my code that sets it to anything else. I added a custom setter and getter to the variable so that I could stop in the debugger when it gets set, and the setter only gets called once, with a non-nil value. I suspect that somehow, a different copy of my ViewController is getting instantiated, but when it does, there are no calls to any of the usual methods like viewDidLoad. In fact there is not even a call to the init method. I don't understand how this is possible.

I was added to a team yesterday as a Developer. I can see this team when I log in to App Store Connect, but it does not appear on the Teams list in Xcode. How do I get Xcode to refresh this list?

I'm assisting a customer with an iOS app. He has a personal (non-company) Apple Developer account. I know that this kind of account didn't used to support collaborators, but I'm not sure what the current status is. He was able to add me to his account and give me permissions (Developer, App Manager). However when I run Xcode, his account does not appear in the list of Teams under my Apple ID, which is preventing me from working. Is this a bug or temporary problem or is the fact that his account is a personal account preventing me from doing this?

Whenever I make a new app I end up getting bug reports from people who say they can't see text, or they can just about see white text against an almost white background. It always turns out to be because their phone is in dark mode, which I don't use. Almost all of my views have the background color set to "System background color" which is the default value when you create a view. Why does dark mode change the color of the text but not the background?

I'm setting up Auth0 to work with my app according to their instructions. I need to add an associated domain, but it doesn't work. When I try to use Auth0, it returns a message that says "Application with identifier (my-bundle-id) is not associated with domain (my-auth0-domain)". In Signing & Capabilities, I have the Associated Domains capability set up with this domain: "webcredentials:(my-auth0-domain)". I also added another version with ?mode=developer on the end of it, but neither works. I am sure that the domain I'm using is correct because I'm able to use it in Postman to authenticate with Auth0. I checked everything else against their documentation and samples several times.