how can i use location which is found in another class? - xcode

Question

i am taking user's location with this code:
#implementation TabBar
CLLocationManager *locationManager;
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
// NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
UsersCurrentLongitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
UsersCurrentLatitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
NSLog(#"Latitude:%#,Longitude:%#",UsersCurrentLatitude,UsersCurrentLongitude);
}
and in nslog screen it is showing location successfully. but when i want to use that locations in another class which imported my location class (in this case it is TabBar), location turns null. what can i do to solve this issue?
Edited:
After I try two different method for my issue i am still getting null at NsLog:
First Method:
At AppDelegate.h:
#property(nonatomic,retain)NSString *latitude;
#property(nonatomic,retain)NSString
At AppDelegate.mlongitude;
#synthesize latitude;
#synthesize longitude;
At TabBar.m
#import "AppDelegate.h"
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
[locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
[(AppDelegate *)[[UIApplication sharedApplication] delegate] setLatitude:[NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude]];
[(AppDelegate *)[[UIApplication sharedApplication] delegate] setLongitude:[NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude]];
}
}
At my SecondView.m
#import "AppDelegate.h"
(void)viewDidLoad
{
[super viewDidLoad];
NSString *UsersCurrentLatitude = [(AppDelegate *)[[UIApplication sharedApplication] delegate] latitude];
NSString *UsersCurrentLongitude = [(AppDelegate *)[[UIApplication sharedApplication] delegate] longitude];
NSLog(#"latitude:%#,longitude%#",UsersCurrentLatitude,UsersCurrentLongitude);
}
Second Method (I found a tutorial in youtube and arrange that method for my issue, so it can be meaningless code):
I made a NSObject Class which is named SingletonClass
At SingletonClass.h
#import <CoreLocation/CoreLocation.h>
#interface SingletonClass : NSObject <CLLocationManagerDelegate>
#property (nonatomic, strong) NSNumber *UsersCurrentLatitude;
#property (nonatomic, strong) NSNumber *UsersCurrentLongitude;
+(SingletonClass *) Lokasyon;
#end
At SingletonClass.m
#import "SingletonClass.h"
#implementation SingletonClass {
CLLocationManager *locationManager;
}
#synthesize UsersCurrentLongitude;
#synthesize UsersCurrentLatitude;
+(SingletonClass *)Lokasyon {
static SingletonClass *Lokasyon = nil;
if (!Lokasyon) {
Lokasyon = [[super allocWithZone:nil] init];
}
return Lokasyon;
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
UsersCurrentLongitude = [NSNumber numberWithFloat:currentLocation.coordinate.longitude];
UsersCurrentLatitude = [NSNumber numberWithFloat:currentLocation.coordinate.latitude];
}
}
#end
At my SeconViewController
#import "SingletonClass.h"
- (void)viewDidLoad
{
[super viewDidLoad];
NSNumber *UsersCurrentLongitude1 = [[SingletonClass Lokasyon]UsersCurrentLongitude];
NSLog(#"%#",UsersCurrentLongitude1);
}

Answer 1

Declare them in the Appdelegate.h like-
#property(nonatomic,retain)NSString *latitude;
#property(nonatomic,retain)NSString *longitude;
make sure u, synthesize latitude and longitude properties in AppDelegate.m class.
Set them in TabBar.m where u get the location in CLLocationManager's didUpdateToLocation:
if (currentLocation != nil) {
[(MyAppDelegate *)[[UIApplication sharedApplication] delegate] setLatitude:[NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude]];
[(MyAppDelegate *)[[UIApplication sharedApplication] delegate] setLongitude:[NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude]];
//UsersCurrentLatitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
//NSLog(#"Latitude:%#,Longitude:%#",UsersCurrentLatitude,UsersCurrentLongitude);
}
Access in other class(es) like-
NSString aLatitude = [(MyAppDelegate *)[[UIApplication sharedApplication] delegate] latitude];
NSString aLongitude = [(MyAppDelegate *)[[UIApplication sharedApplication] delegate] longitude];
PS: there are many other ways to do what u need, like- Having a Singleton class or Saving in the iOS app File system i.e. in App Sandbox..