从扩展名写入存储在App Group容器中的数据库

Question

I have a sqlite database stored in the App Group container in order to register custom shortcut.

I can read/write into it from the app, but not from the keyboard extension. It seems that the database is in read-only mode from extensions.

I'm using the following code to access it:

let appGroupDirectoryPath = NSFileManager.defaultManager().containerURLForSecurityApplicationGroupIdentifier(appGroupId)
let dataBaseURL = appGroupDirectoryPath!.URLByAppendingPathComponent("database.sqlite")

Is there a workaround to be able to write into the database from the extension keyboard, or is it completely impossible?

The database is writable from the simulator but not with real devices. I guess it's because permissions are managed differently on MacOS X and iOS.

Answer 1

Figured it out.

For keyboards, there is a property in the Info.plist file called RequestsOpenAccess . You can turn this on to enable write access to the shared container .

However, the end user will have to turn on "full access" in their settings for this keyboard, and they will be prompted with a scary message about how you could be logging their keystrokes.

Here's the Apple article that explains it:

Designing for User Trust for Custom Keyboard