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Block-based wrapper around Core Location
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
typedef void (^JWLocationManagerCallback)(CLLocation *location);
typedef void (^JWLocationManagerErrorCallback)(NSError *error);
@interface JWLocationManager : NSObject <CLLocationManagerDelegate>
@property (nonatomic, copy) NSString *purpose;
@property (nonatomic, copy) JWLocationManagerCallback locationUpdatedBlock;
@property (nonatomic, copy) JWLocationManagerErrorCallback locationErrorBlock;
+ (JWLocationManager *)sharedInstance;
- (void)startUpdatingLocation;
- (void)disableLocationManager;
@end
#import "JWLocationManager.h"
@interface JWLocationManager()
@property (nonatomic, strong) CLLocationManager *locationManager;
@property (nonatomic, strong) CLLocation *currentLocation;
@end
@implementation JWLocationManager
@synthesize locationManager = _locationManager;
@synthesize locationErrorBlock = _locationErrorBlock;
@synthesize locationUpdatedBlock = _locationUpdatedBlock;
static JWLocationManager *sharedManager = nil;
+ (JWLocationManager *)sharedInstance {
if (!sharedManager)
sharedManager = [[self alloc] init];
return sharedManager;
}
- (id)init {
self = [super init];
if (!self) return nil;
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
return self;
}
- (void)setPurpose:(NSString *)purpose {
_purpose = [purpose copy];
self.locationManager.purpose = purpose;
}
- (void)startUpdatingLocation {
[self.locationManager startUpdatingLocation];
}
- (void)disableLocationManager {
[self.locationManager stopUpdatingLocation];
self.locationManager = nil;
self.currentLocation = nil;
self.locationErrorBlock = nil;
self.locationUpdatedBlock = nil;
sharedManager = nil;
}
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation {
NSTimeInterval locationAge = -[newLocation.timestamp timeIntervalSinceNow];
if (locationAge > 5.0) return;
if (newLocation.horizontalAccuracy < 0) return;
self.currentLocation = newLocation;
if (self.locationUpdatedBlock)
self.locationUpdatedBlock(newLocation);
[self.locationManager stopUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
[self.locationManager stopUpdatingLocation];
if (self.locationErrorBlock)
self.locationErrorBlock(error);
}
@end
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