Background Fetch is not Working on Real iOS Device? - ios

Question

I have created an iOS application which just sends the Location Coordinates to the server after the user's login. I have also implemented the widget which takes the snapshot of the location displayed it on the widget screen and send it to the server. The application is simple. I just want to open the app or widget for a short time in the background after 20-30 mins and send the location to the server.
For this, I have implemented the Background Fetch in the app. It is working while simulating from the debugger. But won't work on the real iOS device. App Code is below.
If there is any other solution to perform such task let me know except the Push/Remote Notifications. Thanks
AppDelegate.swift
import UIKit
import UserNotifications
import Alamofire
import CoreLocation
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {
var window: UIWindow?
var myLat:Double = 0.0
var myLong:Double = 0.0
let locationManager = CLLocationManager()
var MSISDN = ""
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
UIApplication.shared.setMinimumBackgroundFetchInterval(
UIApplication.backgroundFetchIntervalMinimum)
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self as? CLLocationManagerDelegate
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
return true
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locValue:CLLocationCoordinate2D = manager.location!.coordinate
myLat = locValue.latitude
myLong = locValue.longitude
print(locValue)
}
func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
if let userDefaults = UserDefaults(suiteName: "group.com.demo.spoton") {
var value1 = userDefaults.bool(forKey: "IsLogin")
if value1 == true {
print (value1)
MSISDN = userDefaults.string(forKey: "MSISDN")!
var fetchResult: UIBackgroundFetchResult!
print("i'm executing a task")
let Type = 2
let root = "https://demourl.com/locreciver.php?latitude="
let url = "\(root)\(myLat)&longitude=\(myLong)&type=\(2)&msisdn=\(MSISDN)&battery=\(1)";
Alamofire.request(url, method:.post).responseString {
response in
switch response.result {
case .success:
print(response)
completionHandler(.newData)
case .failure(let error):
print(error)
completionHandler(.failed)
}
}
return
}
else{
print("notLogin")
}
}
}// fecth function
func applicationWillResignActive(_ application: UIApplication) {
}
func applicationDidEnterBackground(_ application: UIApplication) {
}
func applicationWillEnterForeground(_ application: UIApplication) {
}
func applicationDidBecomeActive(_ application: UIApplication) {
}
func applicationWillTerminate(_ application: UIApplication) {
}
}
// TodayViewController.swift //Widget
import UIKit
import NotificationCenter
import CoreLocation
import Alamofire
import Swift
import GoogleMaps
import MapKit
class TodayViewController: UIViewController, NCWidgetProviding, CLLocationManagerDelegate,MKMapViewDelegate {
#IBOutlet weak var lblTitle: UILabel!
#IBOutlet weak var mapImage: UIImageView!
let locationManager = CLLocationManager()
var myLat:Double = 0.0
var myLong:Double = 0.0
var MSISDN = ""
#objc func doLaunchApp(){
if let url = NSURL(string: "mainAppUrl://"){
self.extensionContext?.open(url as URL, completionHandler: nil)
}
}
override func viewDidLoad() {
super.viewDidLoad()
// self.extensionContext?.widgetLargestAvailableDisplayMode = NCWidgetDisplayMode.expanded
// let url = URL(string: "mainAppUrl://")!
// self.extensionContext?.open(url, completionHandler: { (success) in
// if (!success) {
// print("error: failed to open app from Today Extension")
// }
// })
//
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(TodayViewController.doLaunchApp))
self.view.addGestureRecognizer(tapGesture)
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
locationManager.requestAlwaysAuthorization()
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locValue:CLLocationCoordinate2D = manager.location!.coordinate
myLat = locValue.latitude
myLong = locValue.longitude
}
func SendData(){
print("Sent")
takeShot()
var batteryLevel:Float = UIDevice.current.batteryLevel
let Type = 2
let root = "https://demourl.com/locreciver.php?latitude="
let url = "\(root)\(myLat)&longitude=\(myLong)&type=\(Type)&msisdn=\(MSISDN)&battery=\(batteryLevel)";
Alamofire.request(url, method:.post).responseString {
response in
switch response.result {
case .success:
print(response)
case .failure(let error):
print(error)
}
}
}
func takeShot(){
let mapSnapshotOptions = MKMapSnapshotter.Options()
// Set the region of the map that is rendered.
let location = CLLocationCoordinate2DMake(myLat, myLong) // Apple HQ
let region = MKCoordinateRegion(center: location, latitudinalMeters: 900, longitudinalMeters: 900)
mapSnapshotOptions.region = region
// Set the scale of the image. We'll just use the scale of the current device, which is 2x scale on Retina screens.
mapSnapshotOptions.scale = UIScreen.main.scale
// Set the size of the image output.
mapSnapshotOptions.size = CGSize(width: mapImage.frame.width, height: mapImage.frame.height)
// Show buildings and Points of Interest on the snapshot
mapSnapshotOptions.showsBuildings = true
mapSnapshotOptions.showsPointsOfInterest = true
let snapShotter = MKMapSnapshotter(options: mapSnapshotOptions)
snapShotter.start { (snapshot:MKMapSnapshotter.Snapshot?, NSError) in
let image = snapshot?.image
var annotation = MKPointAnnotation()
annotation.coordinate = CLLocationCoordinate2D(latitude: self.myLat, longitude: self.myLong)
annotation.title = "Your Title"
let annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "annotation")
let pinImage = UIImage(named: "pin")
print(pinImage)
UIGraphicsBeginImageContextWithOptions(image!.size, true, image!.scale);
image?.draw(at: CGPoint(x: 0, y: 0)) //map
pinImage!.draw(at: (snapshot?.point(for: annotation.coordinate))!)
annotationView.drawHierarchy(in: CGRect(x: snapshot!.point(for: annotation.coordinate).x, y: (snapshot?.point(for: annotation.coordinate).y)!, width: annotationView.frame.size.width-100, height: annotationView.frame.size.height-100), afterScreenUpdates: true)
let finalImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
// completion(image: finalImage, error: nil)
self.mapImage.image = finalImage
//self.mapImage.image = snapshot?.image
}
}
func widgetPerformUpdate(completionHandler: (#escaping (NCUpdateResult) -> Void)) {
if let userDefaults = UserDefaults(suiteName: "group.com.demo.spoton") {
var value1 = userDefaults.bool(forKey: "IsLogin")
if value1 == true {
print (value1)
MSISDN = userDefaults.string(forKey: "MSISDN")!
lblTitle.text = "Service Active"
let timer1 = Timer.scheduledTimer(withTimeInterval: 1500.0, repeats: false) { (timer) in
self.SendData()
}
let timer2 = Timer.scheduledTimer(withTimeInterval: 1500.0, repeats: true) { (timer) in
print("Looop")
self.SendData()
}
}
else {
lblTitle.text = "SpotOn Service InActive. Needs Login"
}
}
completionHandler(NCUpdateResult.newData)
}
}