Estimote didChangeAuthorizationStatus not called if isn't in ViewController - ios

Question

I want call startMonitoringForRegion in method didChangeAuthorizationStatus and everything works fine, basically because code is copied from Estimote Example. This code is in ViewController. Issue occurs when I'm using similar code but placed in separated controller.
This code works fine and method didChangeAuthorizationStatus also didStartMonitoringForRegion is called every time so I open app or changeStatus. So success.
ViewController.m
- (void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
self.region = [[CLBeaconRegion alloc] initWithProximityUUID:[[NSUUID alloc] initWithUUIDString:#"myUUID"]
identifier:#"EstimoteSampleRegion"];
self.beaconManager = [[ESTBeaconManager alloc] init];
self.beaconManager.delegate = self;
[self startRangingBeacons];
}
-(void)startRangingBeacons
{
if ([ESTBeaconManager authorizationStatus] == kCLAuthorizationStatusNotDetermined)
{
[self.beaconManager requestAlwaysAuthorization];
}
else if([ESTBeaconManager authorizationStatus] == kCLAuthorizationStatusDenied)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Location Access Denied"
message:#"You have denied access to location services. Change this in app settings."
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles: nil];
[alert show];
}
else if([ESTBeaconManager authorizationStatus] == kCLAuthorizationStatusRestricted)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Location Not Available"
message:#"You have no access to location services."
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles: nil];
[alert show];
}
}
- (void)beaconManager:(id)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
if (status != kCLAuthorizationStatusNotDetermined && status != kCLAuthorizationStatusDenied )
{
[self.beaconManager startMonitoringForRegion:self.region];
}
}
- (void)beaconManager:(id)manager didStartMonitoringForRegion:(CLBeaconRegion *)region{
NSLog(#"didStartMonitoringForRegion %#",region);
}
This code works partially. Method requestAlwaysAuthorization in BeaconManager is calling once but then didChangeAuthorizationStatus is not even when I've manually called startMonitoringForRegion then method didStartMonitoringForRegion is not called.
Separeted BeaconManager
ViewController.m
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.region = [[CLBeaconRegion alloc] initWithProximityUUID:[[NSUUID alloc] initWithUUIDString:#"myUUID"]
identifier:#"EstimoteSampleRegion"];
self.beaconManager = [[BeaconManager alloc]initWithRegion:self.region];
[self.beaconManager startMonitoring];
}
BeaconManager.swift
class BeaconManager: NSObject,ESTBeaconManagerDelegate {
private lazy var secureBeaconManager:ESTSecureBeaconManager = {
let beaconManagerForReturn = ESTSecureBeaconManager()
beaconManagerForReturn.delegate = self
return beaconManagerForReturn
}()
private lazy var beaconsArray = [CLBeacon]()
var region:CLBeaconRegion!
var delegate:BeaconDelegate?
init(region:CLBeaconRegion) {
super.init()
self.region = region
}
/**
Method which check AuthorizationStatus for application, and will start monitoring if status is equal .AuthorizedAlways
*/
func startMonitoring() {
setupLocalizationAuthorization()
}
private func setupLocalizationAuthorization(){
let status = ESTSecureBeaconManager.authorizationStatus()
if (status == .NotDetermined){
secureBeaconManager.requestAlwaysAuthorization()
}
if (status == .Denied){
delegate?.beaconManager(self, locationAutorizationFail: .Denied)
}
if (status == .Restricted){
delegate?.beaconManager(self, locationAutorizationFail: .Restricted)
}
}
// MARK: - BeaconManager
func beaconManager(manager: AnyObject, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if (status != .NotDetermined && status != .Denied){
secureBeaconManager.startMonitoringForRegion(region)
}
}
func beaconManager(manager: AnyObject, didStartMonitoringForRegion region: CLBeaconRegion) {
print("didStartMonitoring for \(region)")
}
}
Question
Why this is happening? It's thread issue? I have no clue what's going wrong here. From I can see both codes are similar but instructions are placed in different place. It's no matter If I use Swift or Obj-c (tried it already).

Answer 1

Analyze what happens when you start the app for the first time:
You instantiate your BeaconManager and call startMonitoring, which in turn calls setupLocalizationAuthorization. In there, you check the authorization status of your app, and if it's NotDetermined, you instantiate secureBeaconManager (because you declared it a lazy property), assign the delegate (via your lazy-instantion code), and call requestAlwaysAuthorization. This prompts the user to allow the app to access Location Service, and if they agree, iOS issues a call to didChangeAuthorizationStatus with the new, Always status, and you finally you start monitoring. This flow, as you mentioned, works as intended.
Consider however the flow where the app already has the Always authorization:
You instantiate your BeaconManager and call startMonitoring, which in turn calls setupLocalizationAuthorization. In there, you check the authorization status of your app. But you have no if clause for Always status … so the BeaconManager simply finishes there.
Solution: append an if clause for the Always status to your setupLocalizationAuthorization:
if status == .AuthorizedAlways {
secureBeaconManager.startMonitoringForRegion(region)
}
Let's do one final pass over what happens when you implement the proposed solution:
You instantiate your BeaconManager and call startMonitoring, which in turn calls setupLocalizationAuthorization. In there, you check the authorization status of your app. If it's Always, you lazy-instantiate the secureBeaconManager, and start monitoring. The previous flow (for NotDetermined) stays the same.