Using this post you can learn about
- How to create shared object in Obective C
- How to create custom 'init' method
- How to get GPS location using iPhone
//Reciving data for main
screen
POLocationService* locationService = [POLocationService sharedLocationService];
locationService.delegate = self;
[locationService requestLocationInformationFor:@"for finding deals near to you!"];*/
POLocationService.h file
#import "Foundation/Foundation.h"
#import "CoreLocation/CoreLocation.h"
@interface POLocationService : NSObject "CLLocationManagerDelegate"{
CLLocationManager *locationManager_;
id delegate_;
NSString* locationString_;
}
@property (nonatomic, retain) CLLocationManager *locationManager;
@property (nonatomic, assign) id delegate;
@property (nonatomic, retain) id locationString;
+ (POLocationService
*)sharedLocationService;
- (void)requestLocationInformationFor:(NSString *)purpose;
@end
POLocationService.m file
#import "POLocationService.h"
static POLocationService *sharedLocationService = nil;
@implementation POLocationService
@synthesize locationManager = locationManager_;
@synthesize delegate = delegate_;
@synthesize locationString = locationString_;
+ (POLocationService
*)sharedLocationService
{
@synchronized(self) {
if (sharedLocationService
== nil)
{
sharedLocationService
= [[self alloc] init];
}
}
return sharedLocationService;
}
- (id)init
{
if (self = [super init]) {
self.locationManager =
[[CLLocationManager alloc] init];
}
return self;
}
- (void)requestLocationInformationFor:(NSString *)purpose
{
//didRequest_
= YES;
locationManager_.delegate = self;
locationManager_.purpose = purpose;
locationManager_.desiredAccuracy = kCLLocationAccuracyHundredMeters;
locationManager_.distanceFilter = 200;
[locationManager_ startUpdatingLocation];
}
/*
* We want to get and store a location measurement that meets
the desired accuracy. For this example, we are
* going to use horizontal accuracy as
the deciding factor. In other cases, you may wish to use vertical
* accuracy, or both together.
*/
- (void)locationManager:(CLLocationManager
*)manager didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation {
NSString *location = [NSString stringWithFormat:@"%lf;%lf",newLocation.coordinate.latitude,newLocation.coordinate.longitude];
self.locationString = location;
[delegate_ performSelector:@selector(didFindLocation:userDenied:) withObject:location withObject:[NSNumber numberWithInt:0]]; // Third arg is whether user denied
}
- (void)locationManager:(CLLocationManager
*)manager didFailWithError:(NSError *)error {
// The
location "unknown" error simply means the manager is currently unable
to get the location.
if ([error code] != kCLErrorLocationUnknown) {
[locationManager_
stopUpdatingLocation];
locationManager_.delegate = nil;
[delegate_ performSelector:@selector(didFindLocation:userDenied:) withObject:nil withObject:[NSNumber
numberWithInt:0]];
} else if ([error code] != kCLErrorDenied || [error code] != kCLErrorRegionMonitoringDenied)
{
[delegate_ performSelector:@selector(didFindLocation:userDenied:) withObject:nil withObject:[NSNumber
numberWithInt:0]];
} else {
[delegate_ performSelector:@selector(didFindLocation:userDenied:) withObject:nil withObject:[NSNumber
numberWithInt:0]];
}
}
- (void)dealloc
{
[locationManager_ stopUpdatingLocation];
locationManager_.delegate = nil;
[locationManager_ release];
[super dealloc];
}
@end
