I'm having an issue getting the debug preview working. I've tried it on several projects and I seem to be getting the same error:
attach failed (Not allowed to attach to process. Look in the console messages (Console.app), near the debugserver entries when the attached failed. The subsystem that denied the attach permission will likely have logged an informative message about why it was denied.)
When I check the console.app I only see SIGKILL logs, nothing that can really show me where I'm going wrong. My team has the same problem on different devices, so I'm doubtful that this is hardware related. And I've had the issue on brand-new projects as well as legacy ones, so that leads me to believe that it's likely not a "code problem" unless I'm missing something on both...
Using:
MacBook Pro 2015 - Big Sur
Xcode 12.2
vroma
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Our team has recently added support to our app for Live Activities where the source of the data is driven from the app itself (not push notifications).
We've noticed a crash happening in our core data code caused by the following error thrown by the addPersistentStore function where it would attempt to recover and eventually crash. Here's an error we created to help us debug that contains the error details:
Domain: CoreData Code: 1 NSLocalizedDescription: Error performing migration for databaseName=mydb.sqlite. Error details=The file couldn’t be saved because you don’t have permission. - userinfo: ["reason": No permissions to create file; code = 1]
After some trouble shooting, we managed to reproduce the issue by doing a hard reboot while we're running a live activity. It appears that when the device starts back up, the Live Activity starts which triggers the app to hit didFinishLaunchingWithOptions which is where we get our Core Data store initialized.
The problem is that our app uses Data Protection using NSFileProtectionCompleteUntilFirstUserAuthentication and we'd prefer to keep it that way.
The Core Data db is present in the app sandbox and we're also seeing logs to suggest a failure trying to access NSUserDefaults as well.
Is there an accepted solution for this? Is it expected that a Live Activity would cause an application to launch prior to the device being unlocked for the first time? Is there a way to change that?