Universal API for requesting permissions and reading their status — .authorized, .denied & .notDetermined. Each permission ships as a separate product, so the app compiles only the ones it actually uses.

In Xcode: File → Add Package Dependencies → paste URL:

https://github.com/sparrowcode/PermissionsKit

Then pick the products you need. Add only those — every permission API you link is visible to App Review, and unused ones invite questions about why the app needs them.

Request a permission:

import PermissionsKit
import NotificationPermission

Permission.notification([.alert, .badge, .sound]).request {
    // Called once the user answers the system dialog.
}

Read its status:

import PermissionsKit
import CameraPermission

let authorized = Permission.camera.authorized

Apple requires a usage description for most permissions. Get the key for a permission:

let key = Permission.bluetooth.usageDescriptionKey

An xliff export creates the keys for you. Doing it by hand means adding an InfoPlist.strings file, selecting the languages in the inspector, and writing the keys there:

"NSCameraUsageDescription" = "Here description of usage camera";