iOS CLLocationManager in a separate class

As user1071136 said, a singleton location manager is probably what you want. Create a class, a subclass of NSObject, with just one property, a CLLocationManager.

LocationManagerSingleton.h:

#import <MapKit/MapKit.h>@interface LocationManagerSingleton : NSObject <CLLocationManagerDelegate>@property (nonatomic, strong) CLLocationManager* locationManager;+ (LocationManagerSingleton*)sharedSingleton;@end

LocationManagerSingleton.m:

#import "LocationManagerSingleton.h"@implementation LocationManagerSingleton@synthesize locationManager;- (id)init {    self = [super init];    if(self) {        self.locationManager = [CLLocationManager new];        [self.locationManager setDelegate:self];        [self.locationManager setDistanceFilter:kCLDistanceFilterNone];        [self.locationManager setHeadingFilter:kCLHeadingFilterNone];        [self.locationManager startUpdatingLocation];        //do any more customization to your location manager    }    return self;}    + (LocationManagerSingleton*)sharedSingleton {    static LocationManagerSingleton* sharedSingleton;    if(!sharedSingleton) {        static dispatch_once_t onceToken;        dispatch_once(&onceToken, ^{            sharedSingleton = [LocationManagerSingleton new];        }    }    return sharedSingleton;}- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {    //handle your location updates here}- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading {    //handle your heading updates here- I would suggest only handling the nth update, because they    //come in fast and furious and it takes a lot of processing power to handle all of them}@end

To get the most recently received location, simply use [LocationManagerSingleton sharedSingleton].locationManager.location. It might take a few seconds to warm up the GPS to get accurate locations.

Create a singleton class which has a latitude and longitude properties, startLocating and endLocating. In the class, create a CLLocationManager instance, and set its delegate to be the singleton. In startLocating and endLocating, call the appropriate methods of the CLLocationManager instance. Make the delegate methods update the latitude and longitude properties. In other ViewControllers, read this singleton's latitude and longitude properties.

To know when to read those properties from another ViewController, set an observer on these properties (see the NSKeyValueObserving Protocol Reference

Before doing this, look up the Internets for existing code.

After doing this, upload it to GitHub with a permissive license.

Based on the above answers, here is what I did and you can find the complete example on github https://github.com/irfanlone/CLLocationManager-Singleton-Swift

Just import this file in your project, then you can either choose to implement the LocationUpdateProtocol or listen to notification for location updates

import MapKitprotocol LocationUpdateProtocol {    func locationDidUpdateToLocation(location : CLLocation)}/// Notification on update of location. UserInfo contains CLLocation for key "location"let kLocationDidChangeNotification = "LocationDidChangeNotification"class UserLocationManager: NSObject, CLLocationManagerDelegate {    static let SharedManager = UserLocationManager()    private var locationManager = CLLocationManager()    var currentLocation : CLLocation?    var delegate : LocationUpdateProtocol!    private override init () {        super.init()        self.locationManager.delegate = self        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest        self.locationManager.distanceFilter = kCLLocationAccuracyHundredMeters        locationManager.requestAlwaysAuthorization()        self.locationManager.startUpdatingLocation()    }    // MARK: - CLLocationManagerDelegate    func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {        currentLocation = newLocation        let userInfo : NSDictionary = ["location" : currentLocation!]        dispatch_async(dispatch_get_main_queue()) { () -> Void in            self.delegate.locationDidUpdateToLocation(self.currentLocation!)            NSNotificationCenter.defaultCenter().postNotificationName(kLocationDidChangeNotification, object: self, userInfo: userInfo as [NSObject : AnyObject])        }    }}

Usage:

class ViewController: UIViewController, LocationUpdateProtocol {    var currentLocation : CLLocation!    override func viewDidLoad() {        super.viewDidLoad()        NSNotificationCenter.defaultCenter().addObserver(self, selector: "locationUpdateNotification:", name: kLocationDidChangeNotification, object: nil)        let LocationMgr = UserLocationManager.SharedManager        LocationMgr.delegate = self    }    // MARK: - Notifications    func locationUpdateNotification(notification: NSNotification) {        let userinfo = notification.userInfo        self.currentLocation = userinfo!["location"] as! CLLocation        print("Latitude : \(self.currentLocation.coordinate.latitude)")        print("Longitude : \(self.currentLocation.coordinate.longitude)")    }    // MARK: - LocationUpdateProtocol    func locationDidUpdateToLocation(location: CLLocation) {        currentLocation = location        print("Latitude : \(self.currentLocation.coordinate.latitude)")        print("Longitude : \(self.currentLocation.coordinate.longitude)")    }}