App crashing (Location GPS Region Monitoring) - ios

Question

App crashes on launch in Xcode: it does not generate a bug report, and instead terminates during a thread (self > UIViewController > _locationManager).
Below is the code from MapViewController.m
#import "MapViewController.h"
#interface MapViewController ()
#end
#implementation MapViewController
- (void)viewDidLoad {
[super viewDidLoad];
//Monitoring a Region
[self.locationManager requestWhenInUseAuthorization];
[self.locationManager startUpdatingLocation];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)initializeLocationServices
{
NSLog(#"Started location services");
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
_locationManager.distanceFilter = kCLDistanceFilterNone;
_locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
_locationManager.pausesLocationUpdatesAutomatically = NO;
[_locationManager startUpdatingLocation]; // to show authorisation popup
}
-(CLCircularRegion*)createRegion
{
// Test coordinates
CLLocationDegrees latitude = 50;
CLLocationDegrees longitude = -1;
CLLocationDistance radius = 50; // meters;
// If radius is too large, registration fails automatically, so limit the radius to the maximum value
if (radius > _locationManager.maximumRegionMonitoringDistance) {
radius = _locationManager.maximumRegionMonitoringDistance;
}
CLCircularRegion* region = [[CLCircularRegion alloc] initWithCenter:CLLocationCoordinate2DMake(latitude, longitude) radius:radius identifier:#"Clue1"];
region.notifyOnEntry = YES;
region.notifyOnExit = YES;
NSLog(#"Created region");
return region;
}
-(void)monitorProximity
{
CLRegion *region = [self createRegion];
// Check if support is unavailable
if ( ![CLLocationManager isMonitoringAvailableForClass:[CLRegion class]]) {
NSLog( #"Failed to initialise region monitoring: support unavailable");
return;
}
// Check if authorised
if ([CLLocationManager authorizationStatus] != kCLAuthorizationStatusAuthorizedAlways) {
NSLog( #"Failed to initialise region monitoring: app not authorized to use location services");
return;
} else {
NSLog(#"Started monitoring proximity");
}
// Clear out any old regions to prevent buildup.
if ([_locationManager.monitoredRegions count] > 0) {
for (id obj in _locationManager.monitoredRegions)
[_locationManager stopMonitoringForRegion:obj];
}
[_locationManager startMonitoringForRegion:region];
}
-(void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region
{
NSLog(#"Started monitoring for region: %#", [region description]);
//[_locationManager requestStateForRegion:region]; // check if already inside region
}
-(void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error
{
NSLog(#"Failed to start monitoring for region: %#", [error localizedDescription]);
}
-(void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{
NSLog(#"didDetermineState");
if (state == CLRegionStateInside) {
//println(#"Enter");
NSLog(#"inside");
return;
} else if (state == CLRegionStateOutside) {
// println(#"Outside");
NSLog(#"outside");
} else {
// println("unknown");
NSLog(#"unknown");
}
}
-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region
{
NSLog(#"didEnterRegion");
}
-(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region
{
NSLog(#"didExitRegion");
}
-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
NSLog(#"Monitoring authorisation status is now: %#", status == kCLAuthorizationStatusAuthorizedAlways ? #"authorized" : #"not authorized");
if (status == kCLAuthorizationStatusAuthorizedAlways) {
[self monitorProximity];
}
}
#end
UPDATE: Where do I put Initialise call for locationManager and also associate with MapKit map? App won't launch as thread fails.