ios輸入地址得出經緯度

CLGeocoder *myGeocoder = [[CLGeocoder alloc] init];
[myGeocoder geocodeAddressString:_searchBar.text completionHandler:^(NSArray *placemarks, NSError *error) {
if ([placemarks count] > 0 && error == nil) {
CLPlacemark *firstPlacemark = [placemarks objectAtIndex:0];
NSLog(@"%f",firstPlacemark.location.coordinate.latitude);
NSLog(@"%f",firstPlacemark.location.coordinate.longitude);
}
else if ([placemarks count] == 0 && error == nil) {
NSLog(@"Found no placemarks.");
}
else if (error != nil) {
NSLog(@"An error occurred = %@", error); } }];