Initialize an property with data from a block - ios

Question

I want to initialize a CLLocationCoordinate2D property with a variable in a block.
in my company.h file:
#property CLLocationCoordinate2D cllocation;
in my company.m file
NSString *addressComplete = [NSString stringWithFormat:#"%# %d %#", address,(int) plz, place];
[self convertAddress:addressComplete];
-(void)convertAddress:(NSString*) address
{
NSString *location = address;
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
_cllocation.longitude = placemark.location.coordinate.longitude;
_cllocation.latitude = placemark.location.coordinate.latitude;
}
}
];
NSLog(#"longitude: %f", _cllocation.longitude);
}
NSLog shows _cllocation as 0.0000.
How can i get this to work?

Answer 1

This is because statements in block are executed after NSLog statement. You are printing result before assigning. Move NSLog inside the block.
-(void)convertAddress:(NSString*) address
{
NSString *location = address;
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:location
completionHandler:^(NSArray* placemarks, NSError* error){
if (placemarks && placemarks.count > 0) {
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
_cllocation.longitude = placemark.location.coordinate.longitude;
_cllocation.latitude = placemark.location.coordinate.latitude;
NSLog(#"longitude: %f", _cllocation.longitude);
}
}
];
}