The problem was the local firewall …

It seems the path to the file change after a re-launch: The prefs say …/Containers/Data/Application/25E88AEC-9B14-48E9-A7BF-3F93C05AFCB8/Documents/Sample.quizlist When I get the path to the documents folder after relaunch, it is …/Containers/Data/Application/DA18292E-D744-41FF-A98B-A2085E9F4318/Documents/Sample.quizlist I assume this is a feature, not a bug. But why? And where is it documented?

The issue is simple: Every Xcode "Run" is a reinstall

Can anyone explain what is happening? Why is Xcode giving this error in the first place, and why is CODE_SIGNING_ALLOWED a fix for it? I mean, if the original error is not a mistake, then it sounds like a hack, and there should be a better solution

Did you ever resolve that issue?

This warrants the remark that now anyone who has the App can see your mysupersecretapikeyvaluehere, and it is now public

Answering to myself: Works as designed The trick here is that INFOPLIST_PREPROCESS = YES, and that the defines are in the preprocess header. To make it work like about, turn off INFOPLIST_PREPROCESS. What I actually was is to keep it on, get rid of the .xcconfig files entirely, and use <key>SharedGroupName</key> <string>SHARED_GROUP_NAME_IOS</string> which solved my primary problem

Thank you for your reply. Loopbacks and further experimentation, as well as reading code from .Net and Android got me the solution: let symmetricKey = sharedSecret.withUnsafeBytes { rawBufferPointer in var sha = SHA256() sha.update(bufferPointer: rawBufferPointer) let digest = sha.finalize() return SymmetricKey(data: digest) } return symmetricKey My biggest question here is: Is this x9.63 or hkdf, and I am simply using these functions wrong? Or is this derivation method missing from CryptoKit?

Ha there been any update? I have tried two USB readers and opensc, but the card never seems to be read

I have a similar issue. You can start to look further into your problem by attaching to the WebView via Safari on the Mac, and look exactly at what is happening. Add if #available(iOS 16.4, *) { webView.isInspectable = true } to your debug build to enable inspection

I have the folder, too, and it is rather large. I mostly build iOS Apps

Done, FB16070799

This is still the way it works on iOS 18 …

Thank you for your replies, I think I found the answer myself. The issue seems to be that I am formatting from the components. If I use string(from: to:), then the output is as I would expect it! let formatter = DateComponentsFormatter() formatter.unitsStyle = .full formatter.allowedUnits = [.year, .month, .weekOfMonth, .day] let result = formatter.string(from: startDate, to: endDate)