Question

I want my annotation to be stored when I quit the application and pop up again when I launch the application…. How can I make this possible? Any ideas?

-(IBAction)storeLocation:(id)sender{

    SparaPosition *position=[[SparaPosition alloc] initWithCoordinate:location];
    [mapView addAnnotation:position];
    savedPosition = location;

Please… need some help!
Thanks!

Answer 1

If you want to save just one annotation’s coordinates, simplest way is to use NSUserDefaults.

To save:

NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
[ud setDouble:location.latitude forKey:@"savedCoordinate-latitude"];
[ud setDouble:location.longitude forKey:@"savedCoordinate-longitude"];
[ud setBool:YES forKey:@"savedCoordinate-exists"];
[ud synchronize];

To load (in viewDidLoad for example):

NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
if ([ud boolForKey:@"savedCoordinate-exists"])
{
    CLLocationCoordinate2D savedCoordinate;
    savedCoordinate.latitude = [ud doubleForKey:@"savedCoordinate-latitude"];
    savedCoordinate.longitude = [ud doubleForKey:@"savedCoordinate-longitude"];
    //create annotation object using savedCoordinate and add to map view...
}