Catching an application update and resetting the license cache

This topic applies to LUNA ID for iOS only.

We recommend that you reset license cache when you update your app. To do this:

1․ Create the LCLunaConfiguration.resetLicenseCache() function to check the application version and reset the license cache:

    import Foundation

    func checkAndResetLicenseCache() {
        let currentAppVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String
        let savedAppVersion = UserDefaults.standard.string(forKey: "AppVersion")

        if currentAppVersion != savedAppVersion {
            LCLunaConfiguration.resetLicenseCache()
            UserDefaults.standard.set(currentAppVersion, forKey: "AppVersion")
        }
    }
 ```

2․ Call this function when the application starts:

- With UIKit in the AppDelegate.swift file:

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        checkAndResetLicenseCache()

        ...
        return true
    }
}

```

• With SwiftUI in the App.swift file:

    @main
    struct YourApp: App {
        init() {
            checkAndResetLicenseCache()
        }

        var body: some Scene {
            WindowGroup {
                ContentView()
            }
        }
    }