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

i taking user's location 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 showing location successfully. when want use locations in class imported location class (in case tabbar), location turns null. can solve issue? edited:

after try 2 different method issue still getting null @ nslog:

first method:

at appdelegate.h:

@property(nonatomic,retain)nsstring *latitude; @property(nonatomic,retain)nsstring  @ appdelegate.mlongitude; @synthesize latitude; @synthesize longitude; 

at tabbar.m

#import "appdelegate.h"  - (void)viewdidload {     [super viewdidload];     // additional setup after loading 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]]; }       }  @ 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 tutorial in youtube , arrange method issue, can meaningless code):

i made nsobject class named singletonclass @ 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 seconviewcontroller

#import "singletonclass.h" - (void)viewdidload {     [super viewdidload];  nsnumber *userscurrentlongitude1 = [[singletonclass lokasyon]userscurrentlongitude];     nslog(@"%@",userscurrentlongitude1); } 

declare them in appdelegate.h like-

    @property(nonatomic,retain)nsstring *latitude;     @property(nonatomic,retain)nsstring *longitude; 

make sure u, synthesize latitude , longitude properties in appdelegate.m class.

set them in tabbar.m u 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 many other ways u need, like- having singleton class or saving in ios app file system i.e. in app sandbox..