How to Calculate Current Location in Watchkit Extension

iOS: Watch Kit get current location and show on map

Try the following code:

@property (nonatomic, strong) CLLocationManager *locationManager;

- (void)willActivate
{
    self.locationManager = [[CLLocationManager alloc] init];
    [self.locationManager setDelegate:self];
    [self.locationManager requestLocation];
}

- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations
{
    if ([locations count] == 0) {
        // error
        return;
    }

    // success
    self.currentLocation = [locations firstObject];
    CLLocationCoordinate2D myLoc = CLLocationCoordinate2DMake(
        self.currentLocation.coordinate.latitude, 
        self.currentLocation.coordinate.longitude);
}

- (void)locationManager:(CLLocationManager *)manager
       didFailWithError:(nonnull NSError *)error
{
    // error
}

Retrieving location on the Apple Watch

In Xcode, you want use the Debug menu to simulate a location that's either pre-set or use a GPX file as the location source.

Watchkit Maps: show current location

If you have the coordinates for the location you can use - (void)addAnnotation (CLLocationCoordinate2D)location withImage:(UIImage *)image centerOffset:(CGPoint)offset on WKInterfaceMap. Pass in the location for the first parameter and pass in a UIImage for the pin that you want to show for the current location. You will also want to be sure and call setVisibleMapRect so that the map shows the location.

WatchKit and Geolocation

To take the current user location, you should follow this step:
- Add CoreLocation framework to libraries off IOS app.
- In supporting file folder of IOS app, and info.plist file, you should add two row with name :
NSLocationWhenInUseDescription and value you can set "To know your locaton!!"
and another row:
NSLocationAlwaysUsageDescription and value you can set "Always using location!"
- Now import CoreLocation to view controller.swift and add a delegate of CLLocationDelegate.

Now in watchkit extension, you should import CoreLocation and CLLocationManager Delegate too and follow this step in awakeWithContext :

//Make a new locationManager variable:

var locationManager = CLLocationManager()
        //        set delegate
        locationManager.delegate = self
        //        Set desiredAccuracy using a GPS of IP:
        locationManager.desiredAccuracy = kCLLocationAccuracyBest

        //        request to use location

        locationManager.requestAlwaysAuthorization()
        //        start update location
        locationManager.startUpdatingLocation()

after that you write the CLLocationManagerDelegate:

// MARK: CLLocationManagerDelegate

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {

        println(locations)
    }

Note that you have run your IOS app first to accept to take a location of the user, after that you can run Watchkit scheme to take the current User Location.

Using Core Location in Apple WatchKit

In order to do what you want you don't need CoreLocation you just need a magnetometer.

AFAIK the Apple Watch doesn't have one built in.

The sensors it has are...

• Accelerometer
• Gyroscope
• Heart rate sensor
• Barometer

No magnetometer though.

---

Related Topics