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//switch on
var counter = 0
for var i in notificationListData!.data {
    let center = CLLocationCoordinate2D(latitude:  i.data.lat, longitude: i.data.lon)
    let region = CLCircularRegion(center: center, radius: CLLocationDistance(i.data.radius), identifier: String(counter))
    region.notifyOnEntry = true
    region.notifyOnExit = false
    let trigger = UNLocationNotificationTrigger(region: region, repeats: false)

    let content = UNMutableNotificationContent()

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func loadNotificationList() {
let url = URL(string: "http://140.121.197.197:3000/getUserNotificationList?facebook_token="+userData!.facebookAccessToken)!

let task = URLSession.shared.dataTask(with: url) { (data, response , error) in
    let decoder = JSONDecoder()
    decoder.dateDecodingStrategy = .iso8601

    if let data = data, let results = try?
        decoder.decode(NotificationListData.self, from: data)
    {

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func addPointAndCircleToMapView( lat: Double, lon: Double, radius: Int, content: String) {
    let newPin = MKPointAnnotation()
    let coordinate = CLLocationCoordinate2D(latitude: lat,longitude: lon)
    newPin.coordinate = coordinate
    newPin.title = content
    let circle = MKCircle(center: coordinate, radius: CLLocationDistance(radius))
    mapView.add(circle)
    mapView.addAnnotation(newPin)
}

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locationManager = CLLocationManager()

if CLLocationManager.authorizationStatus() == .notDetermined {
    locationManager.requestAlwaysAuthorization()
}
    // 2. 用戶不同意
else if CLLocationManager.authorizationStatus() == .denied {
    DispatchQueue.main.async(){
        let alertController = UIAlertController(title: "定位權限已關閉", message: "如要變更權限，請至 設定 > 隱私權 > 定位服務 開啟", preferredStyle: .alert)
        let okAction = UIAlertAction(title: "ok", style: .default, handler: nil)

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@IBAction func btnLoginWithFacebookClicked(_ sender: Any) {
    let fbLoginManager:FBSDKLoginManager = FBSDKLoginManager()
    fbLoginManager.logIn(withReadPermissions: ["email"], from: self) {(result, error) in
        if (error == nil){
            let fbLoginResult:FBSDKLoginManagerLoginResult = result!
            if fbLoginResult.grantedPermissions != nil {
                if(fbLoginResult.grantedPermissions.contains("email")) {
                    self.getFBUserData()
                    self.turnToIndexSreen()
                    //fbLoginManager.logOut()

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//get notification device token
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    let deviceTokenString = deviceToken.reduce("") {
        return $0 + String(format: "%02x", $1)
    }
    print(deviceTokenString)
    //save device token
    DeviceToken.save(deviceToken: DeviceToken(token: deviceTokenString))

}

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func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    //Push Notification Authorization
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in

    }
    UIApplication.shared.registerForRemoteNotifications()
    // 讓 App 在前景狀態下收到通知
    UNUserNotificationCenter.current().delegate = self

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void setup() {
  pinMode(A0, INPUT);
  pinMode(13, OUTPUT);
}

void loop() {
  int switchStatus;
  switchStatus=digitalRead(A0);
  if(switchStatus==LOW)
  {

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if(2>1){//如果括弧合理

digitalWrite(13, HIGH);//該做什麼

}

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pinMode(設定腳位, 設定模式);

pinMode(A0, INPUT);//腳位是A0，模式是接收訊號

pinMode(13, OUTPUT);//腳位是13，模式是送出訊號