Load Map View on MKMapView - iphone

Question

I want to load map on MKMapView.
Basically what i want to do is,
I want to load Particular Venue in my MapView.
My Database contains lot of Venues, according to requirement, i am fetching Venue and i want to load that Venue in my mapView.
for eg: I got this as Venue: #"100 Oxford Street, London, W1D 1LL, 020 7636 0933" from Database, then i want to load this location in my mapView
Thanks in advance.
EDIT:
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
NSString *venue= #"100 Oxford Street, London, W1D 1LL, 020 7636 0933";
[geocoder geocodeAddressString:venue completionHandler:^(NSArray *placemarks, NSError *error)
{
if ([placemarks count] > 0)
{
CLPlacemark *placemark = [placemarks objectAtIndex:0];
CLLocation *loc = placemark.location;
CLLocationCoordinate2D _venue = loc.coordinate;
NSLog(#"_venue:=%f",loc.coordinate);
MKPointAnnotation *venueAnnotation = [[MKPointAnnotation alloc]init];
[venueAnnotation setCoordinate:_venue];
[venueAnnotation setTitle:#"Venue"];
[MapVw addAnnotation:venueAnnotation];
}
}
];

Answer 1

- (IBAction)BtnClick:(id)sender {
NSLog(#"Map ");
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:#"100 Oxford Street, London, W1D 1LL, 020 7636 0933"
completionHandler:^(NSArray* placemarks, NSError* error)
{
if (placemarks && placemarks.count > 0)
{
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
[self.MapView addAnnotation:placemark];
CLLocationCoordinate2D _venue = placemark.coordinate;
[self.MapView setCenterCoordinate:_venue];
MKCoordinateRegion region = self.MapView.region;
region.span.longitudeDelta = 1.0;
region.span.latitudeDelta = 1.0;
[self.MapView setRegion:region animated:YES];
}
}
];
}

Answer 2

Steps:
1. Import CoreLocation.framework and MapKit.framework.
2. Use CoreLocation class Geocoder's method :
geoCodeAddressString:completionHandler:
NSString *venue= #"100 Oxford Street, London, W1D 1LL, 020 7636 0933";
[_geoCoder geocodeAddressString:venue completionHandler:^(NSArray *placemarks, NSError *error)
{
if ([placemarks count] > 0)
{
CLPlacemark *placemark = [placemarks objectAtIndex:0];
CLLocation *loc = placemark.location;
CLLocationCoordinate2D _venue = loc.coordinate;
}
});
]
[self performSelector:#selector(createVenueAnnotation) withObject:nil afterDelay:5];
UIActivityIndicatorView *activity = [[UIActivityIndicatorView alloc]init];
[_mapView addSubview:activity];
[activity startAnimating];
Step 3. If you want to place a MKPointAnnotation on the venue point.
- (void)createVenueAnnotation{
[activity stopAnimating];
[activity removeFromSuperview];
MKPointAnnotation *venueAnnotation = [[MKPointAnnotation alloc]init];
[venueAnnotation setCoordinate:_venue];
[venueAnnotation setTitle:#"Venue"];
[_mapView addAnnotation:venueAnnotation];
}
Step 4: Center your map around the venue.
// you need to call this function
- (void)centerMapAroundVenue
{
MKMapRect rect = MKMapRectNull;
MKMapPoint venuePoint = MKMapPointForCoordinate(_venue);
rect = MKMapRectUnion(rect, MKMapRectMake(venuePoint .x, venuePoint .y, 0, 0));
MKCoordinateRegion region = MKCoordinateRegionForMapRect(rect);
[_mapView setRegion:region animated:YES];
}

Answer 3

Here is simple scenario :
Get the Co-ordinates of the Address using GeoCoder
Using the Co-ordinatation ,Add the Annotation to the MapView.
Do something Like this to get the CLlocationCoordinate :
- (CLLocationCoordinate2D) geoCodeUsingAddress:(NSString *)address
{
double latitude = 0, longitude = 0;
NSString *esc_addr = [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *req = [NSString stringWithFormat:#"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%#", esc_addr];
NSString *result = [NSString stringWithContentsOfURL:[NSURL URLWithString:req] encoding:NSUTF8StringEncoding error:NULL];
if (result) {
NSScanner *scanner = [NSScanner scannerWithString:result];
if ([scanner scanUpToString:#"\"lat\" :" intoString:nil] && [scanner scanString:#"\"lat\" :" intoString:nil]) {
[scanner scanDouble:&latitude];
if ([scanner scanUpToString:#"\"lng\" :" intoString:nil] && [scanner scanString:#"\"lng\" :" intoString:nil]) {
[scanner scanDouble:&longitude];
}
}
}
CLLocationCoordinate2D center;
center.latitude = latitude;
center.longitude = longitude;
return center;
}
Using the Center just add the annotation to the MapView.
[self.mapView addAnnotation:<annotationName>];
Plz go through this link For more info.
Hope this helps.