Why Geofence tracking using Cllocationmanager delegate methods not calling - ios

Question

Hiii,
I implemented Geo fences by using location manager.
Here i am creating regions
enter code here
In view did load i create object as
//for Geo fence tracking
locationManager = [[CLLocationManager alloc] init];
[locationManager setDelegate:self];
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = kCLLocationAccuracyBest;
[locationManager startMonitoringSignificantLocationChanges];
[locationManager startUpdatingLocation];
-(void)TraceGeofenceLocation{
for (int k=0; k< [self.chGeofenceType count]; k++) {
NSString *chTracLati = [NSString stringWithFormat:#"%f",[[self.chGeofenceLatitudes objectAtIndex:k] doubleValue]];
NSString *chTracLong = [NSString stringWithFormat:#"%f",[[self.chGeofeceLongitudes objectAtIndex:k] doubleValue]];
NSString *chTracRadius = [NSString stringWithFormat:#"%f",[[self.chGeofenceRadius objectAtIndex:k] doubleValue]];
CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(chTracLati.doubleValue, chTracLong.doubleValue);
if ([[self.chGeofenceType objectAtIndex:k] intValue] == 1) {
region = [[CLRegion alloc]initCircularRegionWithCenter:coord radius:chTracRadius.doubleValue identifier:#"Restricted"];
}
else if ([[self.chGeofenceType objectAtIndex:k] intValue] == 2){
region = [[CLRegion alloc]initCircularRegionWithCenter:coord radius:chTracRadius.doubleValue identifier:#"SafeZone"];
}
else{
region = [[CLRegion alloc]initCircularRegionWithCenter:coord radius:chTracRadius.doubleValue identifier:#"Curfew"];
}
[region setNotifyOnEntry:YES];
[region setNotifyOnExit:YES];
[locationManager startMonitoringForRegion:region desiredAccuracy:kCLLocationAccuracyBest];
}
}
I tested in my delegate methods if any region it will enter or not.
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
locationnew = locations.lastObject;
self.Latit=[NSString stringWithFormat:#"%f", locationnew.coordinate.latitude];
self.Longi=[NSString stringWithFormat:#"%f",locationnew.coordinate.longitude];
Speed = [[NSString stringWithFormat:#"%f",[locationnew speed]] floatValue];
NSLog(#"Speed :%f Latitude :%# Longitude :%#",Speed,self.Latit,self.Longi);
}
- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region
{
if ([region.identifier isEqualToString:#"Restricted"]) {
[self sendNotificationtoServerwithtype:#"1"];
}
else if ([region.identifier isEqualToString:#"Curfew"]){
[self sendNotificationtoServerwithtype:#"3"];
}
}
-(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
if ([region.identifier isEqualToString:#"SafeZone"]){
[self sendNotificationtoServerwithtype:#"2"];
}
}
- (void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{
if (state == CLRegionStateInside){
NSLog(#"is in target region");
}else{
NSLog(#"is out of target region");
}
}
My delegate method update locations are calling and i get in console,
but enter into region,exit from regions and did DetermineState are not calling...
Can anybody help me please.
Thanks In Advance

Answer 1

startUpdatingLocation and startMonitoringSignificantLocationChanges are mutually exclusive. If you want to do startMonitoringSignificantLocationChanges to look for geofences, make sure you call stopUpdatingLocation first.
Also be aware that geofence detection is not incredibly precise. On average, you can a resolution of hundreds of meters. I've found that didEnterRegion often take several minutes to be called, if at all.
NOTE: you are currently calling [locationManager startMonitoringForRegion:region desiredAccuracy:kCLLocationAccuracyBest]; The problem with this is kCLLocationAccuracyBest is a really small area. (kCLLocationAccuracyBest codes for the value 1.0). That means you are asking the system to let you know when you enter an area with a diameter 1.0 meter. Since geofence detection has accuracy of hundreds of meters, this may never get called. Instead you should set the accuracy to something much lower: [locationManager startMonitoringForRegion:region desiredAccuracy:200.0];
Good luck.