Trying to pull properties from another class in iOS - iphone

Question

I am completely new to iOS development so I may be doing this wrong but I have a class I am using to get coordinate gps data that I want to have as a generic class I can reuse in lots of apps. My problem is getting the data from the gps to properly display in other apps.
Here is my header file for the GPS class:
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
#interface LocationAwareness : NSObject <CLLocationManagerDelegate> {
CLLocationManager *locationManager;
}
#property(copy) NSString *longitude;
#property(copy) NSString *latitude;
#end
And here is the implementation:
#import "LocationAwareness.h"
#implementation LocationAwareness
#synthesize longitude;
#synthesize latitude;
- (id)init {
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
[locationManager startUpdatingLocation];
return self;
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
// Stops updating location if data has been updated within 10 minutes
if ( abs([newLocation.timestamp timeIntervalSinceDate: [NSDate date]]) < 600) {
[locationManager stopUpdatingLocation];
float latitudedata = newLocation.coordinate.latitude;
latitude = [NSString stringWithFormat:#"%f", latitudedata];
float logitudedata = newLocation.coordinate.longitude;
longitude = [NSString stringWithFormat:#"%f", logitudedata];
}
}
#end
Now I can't seem to find anywhere that tells me how to get the latitude or longitude properties in another project. I have the header imported and have tried to store LocationAwareness.latitude into a variable that I can use but everything I store it in ends up blank. When I start my main class and aloc init a locationawareness object the gps fires up so I think its working but I don't seem to know enough about how this works to get everything in order. I've been searching the internet for hours. Anyone have an idea what I am doing wrong?

Answer 1

Well, this may or may not be causing the problem (it's quite likely), but a major problem is your init method.
The beginning should be:
self = [super init];
if (self) {
// Do your initializing as you did above.
}
return self;
edit:
I added your code with my update to a project and it works well.
In order to use this, you should do something like the following:
LocationAwareness *loc = [[LocationAwareness alloc] init];
// Give it some time to start updating the current location and then
// in a different function:
NSLog(#"%#", loc.latitude);
EDIT 2
Wherever you are using this, you will want to declare a property which stores it so that you can create it once and reference it many times. To do that, use the following code:
In the header for the object where you want to use this object, add this with the other properties:
#property (nonatomic, assign) LocationAwareness *location;
Then, towards the top of your implementation file (.m file) you should see other #synthesize lines, add this one:
#synthesize location;
Then, create the actual location instance that you want to use as per the example above:
self.location = [[LocationAwareness alloc] init];
Now give it some time to figure out your location and start providing updates. Then you can print the location like this:
NSLog(#"%#", self.location.latitude);