SGLocationManager's Meat

SGLocationManager.h

//
//  SGLocationManager.h
//  Second Gear Pitbox
//
//  Created by Justin Williams on 12/5/10.
//  Copyright 2010 Second Gear. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>

typedef void (^SGLocationManagerHandler)(CLLocation *location, NSError *error);

@interface SGLocationManager : NSObject <CLLocationManagerDelegate>
{
@private
  CLLocationManager *locationManager;
  SGLocationManagerHandler handler;
}

@property (nonatomic, retain) CLLocationManager *locationManager;
@property (nonatomic, copy) SGLocationManagerHandler handler;

- (void)startUpdatingLocationWithCompletionHandler:(SGLocationManagerHandler)handler;
- (void)stopUpdatingLocation;

@end

SGLocationManager.m

//
//  SGLocationManager.m
//  Second Gear Pitbox
//
//  Created by Justin Williams on 12/5/10.
//  Copyright 2010 Second Gear. All rights reserved.
//

#import "SGLocationManager.h"


@implementation SGLocationManager

@synthesize locationManager;
@synthesize handler;

- (id) init 
{  
  if ((self = [super init])) 
  {
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
  }
  
  return self;
}

#pragma mark -
#pragma mark Instance Methods
// +--------------------------------------------------------------------
// | Instance Methods
// +--------------------------------------------------------------------

- (void)startUpdatingLocationWithCompletionHandler:(SGLocationManagerHandler)theHandler
{
  if ((self.locationManager.locationServicesEnabled))
  {
    self.handler = theHandler;
    [self.locationManager startUpdatingLocation];
  }
  else
  {
    NSRunAlertPanel(NSLocalizedString(@"Location Services Disabled", nil), NSLocalizedString(@"I can't figure out where you are if you don't turn on location services.", nil), NSLocalizedString(@"OK", nil), nil, nil);
  }
}

- (void)stopUpdatingLocation
{
  self.handler = nil;
  [self.locationManager stopUpdatingLocation];
}

#pragma mark -
#pragma mark CLLocationManager Delegate Methods
// +--------------------------------------------------------------------
// | CLLocationManager Delegate Methods
// +--------------------------------------------------------------------

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation;
{
  self.handler(newLocation, nil);
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error;
{
  self.handler(nil, error);
}

@end