MapView does not show proper point - ios

Question

I have just started to use MapKit framework, and my first practice did not go well :)
Everything seems to be works fine except MapView showing somewhere in ocean and it did not find any place (ex: Land, island). I think latitude and longitude getting out of range somehow.
here is my code:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UIBarButtonItem *zoomButton =
[[UIBarButtonItem alloc]
initWithTitle: #"Zoom-In"
style:UIBarButtonItemStyleBordered
target: self
action:#selector(zoomIn:)];
UIBarButtonItem *typeButton =
[[UIBarButtonItem alloc]
initWithTitle: #"Zoom-Out"
style:UIBarButtonItemStyleBordered
target: self
action:#selector(zoomOut:)];
NSArray *buttons = [[NSArray alloc]
initWithObjects:zoomButton, typeButton, nil];
barButtons.items = buttons;
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5*METERS_PER_MILE, 0.5*METERS_PER_MILE);
MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
zoomLocation.latitude = 48.431638;
zoomLocation.longitude= 27.169436;
annotationPoint.coordinate = zoomLocation;
annotationPoint.title = #"My Company";
annotationPoint.subtitle = #"my Company Title";
//[self __mapView];
MKCoordinateRegion adjustedRegion = [__mapView regionThatFits:viewRegion];
[__mapView setRegion:adjustedRegion animated:YES];
[__mapView addAnnotation:annotationPoint];
}

Answer 1

You are setting zoomLocation coordinates after creating region. Try first to set zoomLocation
...
zoomLocation.latitude = 48.431638;
zoomLocation.longitude= 27.169436;
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5*METERS_PER_MILE, 0.5*METERS_PER_MILE);
MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
...