I have "googled" this question a few times today with no luck. I would like to know if it is possible to create an annotation in Mapview from an address rather than using the lat/Long method. My current code is below.
//1. Create a coordinate for use with the annotation
CLLocationCoordinate2D Sharon;
Sharon.latitude = 38.952223;
Sharon.longitude = -77.193646;
Annotation *myAnnotation = [Annotation alloc];
myAnnotation.coordinate = Sharon;
myAnnotation.title = @"Sharon Lodge #327";
myAnnotation.subtitle = @"McLean, VA";
Try like this,
NSString *location = "some address, state, and zip";
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];
MKCoordinateRegion region = self.mapView.region;
region.center = placemark.region.center;
region.span.longitudeDelta /= 8.0;
region.span.latitudeDelta /= 8.0;
[self.mapView setRegion:region animated:YES];
[self.mapView addAnnotation:placemark];
}
];
for annotation title and subtitle,
CLPlacemark *topResult = [placemarks objectAtIndex:0];
// Create an MLPlacemark
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
// Create an editable PointAnnotation, using placemark's coordinates, and set your own title/subtitle
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = placemark.coordinate;
point.title = @"Sample Location";
point.subtitle = @"Sample Subtitle";
// Set your region using placemark (not point)
MKCoordinateRegion region = self.mapView.region;
region.center = placemark.region.center;
region.span.longitudeDelta /= 8.0;
region.span.latitudeDelta /= 8.0;
// Add point (not placemark) to the mapView
[self.mapView setRegion:region animated:YES];
[self.mapView addAnnotation:point];
// Select the PointAnnotation programatically
[self.mapView selectAnnotation:point animated:NO];
You can get lat long from an address using google api or CLGeocoder
google api
CLGeocoder
-(id)getAnnotationAryFromAddress
{
CLGeocoder *geocoder2 = [[CLGeocoder alloc] init];
NSString *addressString = "string contain address, city, state and zip";
[geocoder2 geocodeAddressString:addressString
completionHandler:^(NSArray *placemarks, NSError *error) {
if (error) {
//NSLog(@"Geocode failed with error: %@", error);
return;
}
if (placemarks && placemarks.count > 0)
{
CLPlacemark *placemark = [placemarks objectAtIndex:0];
CLLocation *location = placemark.location;
RegionAnnotation *annotation = [[RegionAnnotation alloc] init];
CLLocationCoordinate2D theCoordinate1;
theCoordinate1 = location.coordinate;
annotation.title = @"Title";
annotation.subtitle = @"SubTitle";
annotation.tag = i;
annotation.coordinate = theCoordinate1;
[self.mapView addAnnotation:annotation];
}
}];
}
return self;
}
来源:https://stackoverflow.com/questions/13557026/can-you-create-an-annotation-in-mapview-from-an-address