How to Set a Region for a MKMapView? - ios

Question

I am new in iOS apps development and I want to put a Map in My application with a pushpin on an exact location using its latitude and longitude. I add the Map but the problem is it always appear with its initial position an the push pin doesn't appear (It is on the map but you need to change the position to see it ) . Like this figures shows :
Initial Position
2.- After I moved the map's position
What I want is to show the position of the pushpin as a default location and with a zoom .
This is a sample of My Code :
- (void)viewDidLoad
{
[super viewDidLoad];
CLLocationCoordinate2D myCoordinate = {20.5, -7.06}; //AS an Example
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = myCoordinate;
//Drop pin on map
[self.mapView addAnnotation:point];
//Region with Zoom
-(void)viewWillAppear:(BOOL)animated {
CLLocationCoordinate2D zoomLocation;
zoomLocation.latitude = 20.5;
zoomLocation.longitude= -7.6;
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5*METERS_PER_MILE, 0.5*METERS_PER_MILE);
[self.mapView setRegion:viewRegion animated:YES];
}
I used this code but still the same thing it always display the initial position (Figure 1)
Thank You .

Answer 1

(void)viewDidLoad
{
[super viewDidLoad];
MapAnnotation *ann = [[MapAnnotation alloc] init];
MKCoordinateRegion region;
region.center.latitude = 31.504679;
region.center.longitude = 74.247429;
region.span.latitudeDelta = 0.01;
region.span.longitudeDelta = 0.01;
[mapView setRegion:region animated:YES];
ann.title = #"Digital Net";
ann.subtitle = #"Office";
ann.coordinate = region.center;
[mapView addAnnotation:ann];
}
(MKAnnotationView *) mapView:(MKMapView *)mpView viewForAnnotation:(id)annotation {
MKPinAnnotationView *pinView = nil;
if(annotation != mapView.userLocation) {
static NSString *defaultID = #"myLocation";
pinView = (MKPinAnnotationView *)[mpView dequeueReusableAnnotationViewWithIdentifier:defaultID];
if(pinView == nil) {
pinView = [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:defaultID];
pinView.pinColor = MKPinAnnotationColorGreen;
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
}
}
return pinView;
}
I have done something like that and it was working fine