Getting location update after certain distance (5 m in my case) - ios

Question

I am taking input of distance filter from user. For testing purpose I am taking it to be 5 m. But I am getting no location updates after walking 5 m. I am testing it on iPhone simulator 5s.
MainScreenController.m
#interface MainScreenController ()
#property (strong, nonatomic) IBOutlet UITextField *txtTakeDistance;
-(void)writeToTextFile : (NSArray<CLLocation *> *) location;
-(void)ShowContentlist;
#end
#implementation MainScreenController
{
//CLLocation *location;
CLLocationManager *locationManager;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
locationManager = [[CLLocationManager alloc]init];
}
- (IBAction)btnSetDistance:(id)sender {
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters; // Tried every accuracy option
locationManager.pausesLocationUpdatesAutomatically = NO;
locationManager.distanceFilter = [_txtTakeDistance.text doubleValue];
if ([locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)]) {
[locationManager requestWhenInUseAuthorization];
}
[locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
NSLog(#"didFailWithError: %#", error);
UIAlertController *controller = [UIAlertController alertControllerWithTitle:#"Error" message:#"Failed to fecth current location" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:#"OK" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}];
[controller addAction:okAction];
[self presentViewController:controller animated:YES completion:nil];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
CLLocation *currentLoaction;
currentLoaction = [locations lastObject];
if(locations != nil){
NSLog(#"--> : %#",locations);
[self writeToTextFile:locations];
}
[locationManager stopUpdatingLocation];
}
-(void)writeToTextFile : (NSArray<CLLocation *> *) location{
NSFileManager *fileManager = [NSFileManager defaultManager];
CLLocation *currentLocation;
currentLocation = [location lastObject];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"yyyy-MM-DD HH:mm:ss"];
NSString *timeStamp = [timeFormat stringFromDate:currentLocation.timestamp];
NSString *content = [NSString stringWithFormat:#"\n%f|%f|%#\n",currentLocation.coordinate.latitude,currentLocation.coordinate.longitude,timeStamp];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDir = [paths objectAtIndex:0];
if ([fileManager fileExistsAtPath:documentDir]==YES) {
NSString *documentFile = [documentDir stringByAppendingPathComponent:#"log.txt"];
NSString *textFromFile = [NSString stringWithContentsOfFile:documentFile encoding:NSUTF8StringEncoding error:nil];
NSString *textToFile = [textFromFile stringByAppendingString:content];
[textToFile writeToFile:documentFile atomically:YES encoding:NSUTF8StringEncoding error:nil];
}else{
NSLog(#"No such file");
}
}
Do correct me if I am doing it in wrong way. All the suggestions are appreciated. Thank you.

Answer 1

Make some change in your code like:
- (IBAction)btnSetDistance:(id)sender {
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.pausesLocationUpdatesAutomatically = NO;
locationManager.distanceFilter =5;
if ([locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)]) {
[locationManager requestWhenInUseAuthorization];
}
[locationManager startUpdatingLocation];
}
and most important thing is,you can not check how much distance you moved by moving mac.
you should check it on your device.

Answer 2

Try this code
- (IBAction)btnSetDistance:(id)sender
{
locationManager=[[CLLocationManager alloc] init];
locationManager.delegate=self;
if (([locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)]))
{
[locationManager requestWhenInUseAuthorization];
}
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = 5; // change it according to need
[locationManager startUpdatingLocation];
}
with this line locationManager.distanceFilter = 5; every 5 meter distance if you cover map will update
To get the updated Latitude and Longitudes use this code
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation* location = [locations lastObject];
NSDate* eventDate = location.timestamp;
NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
double lat = location.coordinate.latitude;
double longi = location.coordinate.longitude;
if (abs(howRecent) < 15.0)
{
NSLog(#"%f,%f",lat,longi);
[locationManager stopUpdatingLocation];
}
}