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); }
}];