Code for LocationAppDelegate

LocationAppDelegate.swift

class LocationAppDelegate: NSObject, UIApplicationDelegate {
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]? = nil) -> Bool {
        
        // initialize location manager
        return true
    }
    
    func applicationWillEnterForeground(_ application: UIApplication) {
        // start tracking
    }
    
    func applicationDidEnterBackground(_ application: UIApplication) {
        // stop tracking
    }
    
    func applicationDidBecomeActive(_ application: UIApplication) {
        // some location related code
    }
}