所以这是我的最后一个查询。我已经拥有了我需要的所有组件，但是，我需要手机从地理编码器中创建一个字符串，以便将其输入谷歌地图。该字符串被传递到服务器，然后由不同的用户从该数据库抓取到另一部 iPhone。我已经完成了数据库获取/发布端，但我需要地理编码才能工作，以便它可以生成地址字符串。这是我的代码：我使用 Mark/LaMarche 的 mapkit 教程作为我的基础。我的问题是：我可以使用地理编码器而不必使用 MapKit 吗？那会比下面写的代码节省更多的代码吗？谢谢！
- (IBAction)findMe {
CLLocationManager *lm = [[CLLocationManager alloc] init];
lm.delegate = self;
lm.desiredAccuracy = kCLLocationAccuracyBest;
[lm startUpdatingLocation];
progressBar.hidden = NO;
progressBar.progress = 0.0;
progressLabel.text = NSLocalizedString(@"Determining Current Location", @"Determining Current Location");
button.hidden = YES;
}
- (void)openCallout:(id<MKAnnotation>)annotation {
progressBar.progress = 1.0;
progressLabel.text = NSLocalizedString(@"Showing Annotation",@"Showing Annotation");
[mapView selectAnnotation:annotation animated:YES];
}
#pragma mark -
- (void)viewDidLoad {
mapView.mapType = MKMapTypeStandard;
// mapView.mapType = MKMapTypeSatellite;
// mapView.mapType = MKMapTypeHybrid;
}
- (void)viewDidUnload {
self.mapView = nil;
self.progressBar = nil;
self.progressLabel = nil;
self.button = nil;
}
- (void)dealloc {
[mapView release];
[progressBar release];
[progressLabel release];
[button release];
[address release];
[super dealloc];
}
#pragma mark -
#pragma mark CLLocationManagerDelegate Methods
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation {
if ([newLocation.timestamp timeIntervalSince1970] < [NSDate timeIntervalSinceReferenceDate] - 60)
return;
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(newLocation.coordinate, 2000, 2000);
MKCoordinateRegion adjustedRegion = [mapView regionThatFits:viewRegion];
[mapView setRegion:adjustedRegion animated:YES];
manager.delegate = nil;
[manager stopUpdatingLocation];
[manager autorelease];
progressBar.progress = .25;
progressLabel.text = NSLocalizedString(@"Reverse Geocoding Location", @"Reverse Geocoding Location");
MKReverseGeocoder *geocoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
geocoder.delegate = self;
[geocoder start];
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error {
NSString *errorType = (error.code == kCLErrorDenied) ?
NSLocalizedString(@"Access Denied", @"Access Denied") :
NSLocalizedString(@"Unknown Error", @"Unknown Error");
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:NSLocalizedString(@"Error getting Location", @"Error getting Location")
message:errorType
delegate:self
cancelButtonTitle:NSLocalizedString(@"Okay", @"Okay")
otherButtonTitles:nil];
[alert show];
[alert release];
[manager release];
}
#pragma mark -
#pragma mark Alert View Delegate Methods
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
progressBar.hidden = YES;
progressLabel.text = @"";
}
#pragma mark -
#pragma mark Reverse Geocoder Delegate Methods
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
{
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:NSLocalizedString(@"Error translating coordinates into location", @"Error translating coordinates into location")
message:NSLocalizedString(@"Geocoder did not recognize coordinates", @"Geocoder did not recognize coordinates")
delegate:self
cancelButtonTitle:NSLocalizedString(@"Okay", @"Okay")
otherButtonTitles:nil];
[alert show];
[alert release];
geocoder.delegate = nil;
[geocoder autorelease];
}
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark {
progressBar.progress = 0.5;
progressLabel.text = NSLocalizedString(@"Location Determined", @"Location Determined");
MapLocation *annotation = [[MapLocation alloc] init];
annotation.streetAddress = placemark.thoroughfare;
annotation.city = placemark.locality;
annotation.state = placemark.administrativeArea;
annotation.zip = placemark.postalCode;
annotation.coordinate = geocoder.coordinate;
NSString *firstTwo = [placemark.thoroughfare stringByAppendingFormat:@" %@",placemark.locality];
NSString *firstThree = [firstTwo stringByAppendingFormat:@", %@",placemark.administrativeArea];
NSString *makeAddress = [firstThree stringByAppendingFormat:@", %@",placemark.postalCode];
address = makeAddress;
NSLog(@"%@", address);
[mapView addAnnotation:annotation];
[annotation release];
geocoder.delegate = nil;
[geocoder autorelease];
}
#pragma mark -
#pragma mark Map View Delegate Methods
- (MKAnnotationView *) mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>) annotation {
static NSString *placemarkIdentifier = @"Map Location Identifier";
if ([annotation isKindOfClass:[MapLocation class]]) {
MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:placemarkIdentifier];
if (annotationView == nil) {
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:placemarkIdentifier];
}
else
annotationView.annotation = annotation;
annotationView.enabled = YES;
annotationView.animatesDrop = YES;
annotationView.pinColor = MKPinAnnotationColorPurple;
annotationView.canShowCallout = YES;
[self performSelector:@selector(openCallout:) withObject:annotation afterDelay:0.5];
progressBar.progress = 0.75;
progressLabel.text = NSLocalizedString(@"Creating Annotation",@"Creating Annotation");
return annotationView;
}
return nil;
}
- (void)mapViewDidFailLoadingMap:(MKMapView *)theMapView withError:(NSError *)error {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:NSLocalizedString(@"Error loading map", @"Error loading map")
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:NSLocalizedString(@"Okay", @"Okay")
otherButtonTitles:nil];
[alert show];
[alert release];
}