Hi, I have a hard time getting my head wrapped around the possibilities of running a app or a task in a app in the background. I have a app where I utilize MusicKit to create a playlist in Apple Music, and add songs to the playlist. Now the songs added are picked from choices made by the user, and the total number of songs to add is 75, and that takes some time. And if the user switches to a different app or the phone is locked, the add songs logic stops, and then starts again as soon as the app is active again. What I am trying to achieve is of course for this to keep processing also when the app is not active, so basically to keep it running in the background. But this is where I struggle to understand how I can do that - The available choice seems to be BGTaskScheduler, but that just does not seem correct. From what I understand it just schedules a task, and it will be processed whenever the app or phone "feels like it" (again, my understanding, might be wrong), and that won't work in my scenario. I want the task to start when the user taps a button, and just keep running until it is finished, regardless of if the app is active or not. Any pointers, tips, advices out there on how I can achieve this?

I have an existing Xcode project that I am trying to add MusicKit to, but for some reason I am unable to. I have logged into my developer account, and ticked off the MusicKit checkbox under the Services tab of my app in the Certificates, Identifiers & Profiles section. In Xcode I have Automatically manage signing set to true. But MusicKit does not show up as a Capability, neither in the list of capabilities in my app, nor when trying to add it with the +Capability button. I have done this successfully before with Game Center, so I really do not understand why this does not work with MusicKit. Any ideas as to how this can be solved?