AskUserLocationWhenLunch.swift

import UIKit
import CoreLocation
import MapKit
//記得要import CoreLocation跟Mapkit



@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {
    
    var window: UIWindow?
    var myLocationManager : CLLocationManager = CLLocationManager()
    var myUserDefaults : UserDefaults!
    let userLocationAuth : String = "locationAuth"
    
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        self.myUserDefaults = UserDefaults.standard
        myLocationManager.delegate = self
        myLocationManager.distanceFilter = kCLLocationAccuracyNearestTenMeters
        myLocationManager.desiredAccuracy = kCLLocationAccuracyBest
        myLocationManager.activityType = .automotiveNavigation
        myLocationManager.startUpdatingHeading()
        
        if CLLocationManager.authorizationStatus() == .notDetermined{
            myLocationManager.requestWhenInUseAuthorization()
        }//if
        else if CLLocationManager.authorizationStatus() == .denied || CLLocationManager.authorizationStatus() == .restricted {
            self.myUserDefaults.set(false, forKey: userLocationAuth)
            self.myUserDefaults.synchronize()
          //這邊可以設定你想要執行的功能，例如這邊我想要紀錄使用者的權限狀況，所以用了userDefaults的功能。
          //如果你沒有想要執行任何功能，else if 這一段這一段可以完全不寫。
        }//else if
        else if CLLocationManager.authorizationStatus() == .authorizedWhenInUse{
            self.myUserDefaults.set(true, forKey: userLocationAuth)
            self.myUserDefaults.synchronize()
          //這一段同上，如果你沒有想要執行任何功能，這一段可以不寫
          //
        }//else if        
        return true
    }//didFinishLaunchingWithOptions
}//class

//在大引號後面加上它來自哪個開頭是我的習慣，不然我很容易找不到而森77