あなたがしなければならないのは、現在の座標を見つけるCLLocationManagerをセットアップすることです。現在の座標では、MKReverseGeoCoderを使用して場所を見つける必要があります。
- (void)viewDidLoad
{
// this creates the CCLocationManager that will find your current location
CLLocationManager *locationManager = [[[CLLocationManager alloc] init] autorelease];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
[locationManager startUpdatingLocation];
}
// this delegate is called when the app successfully finds your current location
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
// this creates a MKReverseGeocoder to find a placemark using the found coordinates
MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
geoCoder.delegate = self;
[geoCoder start];
}
// this delegate method is called if an error occurs in locating your current location
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"locationManager:%@ didFailWithError:%@", manager, error);
}
// this delegate is called when the reverseGeocoder finds a placemark
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
{
MKPlacemark * myPlacemark = placemark;
// with the placemark you can now retrieve the city name
NSString *city = [myPlacemark.addressDictionary objectForKey:(NSString*) kABPersonAddressCityKey];
}
// this delegate is called when the reversegeocoder fails to find a placemark
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
{
NSLog(@"reverseGeocoder:%@ didFailWithError:%@", geocoder, error);
}
IOS 5以降、MKReverseGeoCoderは非推奨です！
CLGeocoderでCLLocationManagerを使用したいので、非常にシンプルでブロックで動作します。
例：
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
[self.locationManager stopUpdatingLocation];
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:newLocation
completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark *placemark in placemarks) {
.... = [placemark locality];
}
}];
}
編集：代わりにfor inループもできます：
NSString *locString = placemarks.count ? [placemarks.firstObject locality] : @"Not Found";
これは私のためにうまく機能しています：
CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
[geocoder reverseGeocodeLocation:self.locationManager.location
completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(@"reverseGeocodeLocation:completionHandler: Completion Handler called!");
if (error){
NSLog(@"Geocode failed with error: %@", error);
return;
}
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(@"placemark.ISOcountryCode %@",placemark.ISOcountryCode);
NSLog(@"placemark.country %@",placemark.country);
NSLog(@"placemark.postalCode %@",placemark.postalCode);
NSLog(@"placemark.administrativeArea %@",placemark.administrativeArea);
NSLog(@"placemark.locality %@",placemark.locality);
NSLog(@"placemark.subLocality %@",placemark.subLocality);
NSLog(@"placemark.subThoroughfare %@",placemark.subThoroughfare);
}];
誰かがMKReverseGeocoderからCLGeocoderに移行しようとしている場合、私は助けになるかもしれないブログ投稿を書いています http://jonathanfield.me/jons-blog/clgeocoder-example.html
基本的には、locationManagerオブジェクトとCLGeocoderオブジェクトを作成した後、このコードをviewDidLoad（）に追加し、データを表示するためのラベルまたはテキスト領域を作成するだけです。
[super viewDidLoad];
locationManager.delegate = self;
[locationManager startUpdatingLocation];
locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
[self.CLGeocoder reverseGeocodeLocation: locationManager.location completionHandler:
^(NSArray *placemarks, NSError *error) {
CLPlacemark *placemark = [placemarks objectAtIndex:0];
isoCountryCode.text = placemark.ISOcountryCode;
country.text = placemark.country;
postalCode.text= placemark.postalCode;
adminArea.text=placemark.administrativeArea;
subAdminArea.text=placemark.subAdministrativeArea;
locality.text=placemark.locality;
subLocality.text=placemark.subLocality;
thoroughfare.text=placemark.thoroughfare;
subThoroughfare.text=placemark.subThoroughfare;
//region.text=placemark.region;
}];
誰かがそれをSwiftで必要とするなら、これが私がやった方法です：
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.first!
let coordinateRegion = MKCoordinateRegionMakeWithDistance(location.coordinate, 500, 500)
self.location = location
self.locationManager?.stopUpdatingLocation()
// Drop a pin at user's Current Location
let myAnnotation: MKPointAnnotation = CustomPointAnnotation()
myAnnotation.coordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
myAnnotation.title = "Localização"
self.mapViewMK.addAnnotation(myAnnotation)
self.mapViewMK.setRegion(coordinateRegion, animated: true)
self.locationManager?.stopUpdatingLocation()
self.locationManager = nil
// Get user's current location name
let geocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(self.location!) { (placemarksArray, error) in
if (placemarksArray?.count)! > 0 {
let placemark = placemarksArray?.first
let number = placemark!.subThoroughfare
let bairro = placemark!.subLocality
let street = placemark!.thoroughfare
self.addressLabel.text = "\(street!), \(number!) - \(bairro!)"
}
}
}
CLLocationManagerをセットアップした後、緯度/経度のペアとして位置の更新を取得します。その後、CLGeocoderを使用して、座標をわかりやすい場所名に変換できます。
Swift 4のサンプルコードを次に示します。
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let lastLocation = locations.last {
let geocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(lastLocation) { [weak self] (placemarks, error) in
if error == nil {
if let firstLocation = placemarks?[0],
let cityName = firstLocation.locality { // get the city name
self?.locationManager.stopUpdatingLocation()
}
}
}
}
}
ユーザーの現在位置を取得し、MKReverseGeocoderを使用して都市を認識する必要があります。
iPhoneアプリプログラミングガイド 、第8章にすばらしい例があります。ジオコーダーを初期化して位置を取得したら、デリゲートを設定し、目印から国を読み取ります。 MKReverseGeocodeDelegateのドキュメントを読み、メソッドを作成します。
- reverseGeocoder：didFindPlacemark：
reverseGeocoder：didFailWithError：
MKReverseGeocoder *geocoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate]; geocoder.delegate = self; [geocoder start];
現在の都市を取得するためにこのコードを使用できます：-
拡張YourController：CLLocationManagerDelegate {func locationManager（manager：CLLocationManager、didUpdateLocations locations：[CLLocation]）{
CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {(placemarks, error)->Void in
if (error != nil)
{
manager.stopUpdatingLocation()
return
}
else
{
if placemarks!.count > 0
{
let placeMarksArrray: NSArray = placemarks!
let pm = placeMarksArrray[0] as! CLPlacemark
self.displayLocationInfo(pm)
manager.stopUpdatingLocation()
} else
{
print("Problem with the data received from geocoder")
}
}
})
}
func displayLocationInfo(placemark: CLPlacemark!) {
if (placemark != nil) {
//stop updating location to save battery life
locationLocation.stopUpdatingLocation()
var tempString : String = ""
if(placemark.locality != nil){
tempString = tempString + placemark.locality! + " "
print(placemark.locality)
}
if(placemark.postalCode != nil){
tempString = tempString + placemark.postalCode! + " "
print(placemark.postalCode)
}
if(placemark.administrativeArea != nil){
tempString = tempString + placemark.administrativeArea! + " "
print(placemark.administrativeArea)
}
if(placemark.country != nil){
tempString = tempString + placemark.country! + " "
}
let dictForaddress = placemark.addressDictionary as! NSDictionary
if let city = dictForaddress["City"] {
print(city)
}
strLocation = tempString
}
}
これが私の小さなSwift=現在の場所に関する逆ジオコーディングされた情報を取得するのに役立つクラスです。Info.plistのNSLocationWhenInUseUsageDescriptionフィールドを忘れないでください。
class CurrentPlacemarkUpdater: NSObject, CLLocationManagerDelegate {
private let locationManager = CLLocationManager()
private let geocoder = CLGeocoder()
private(set) var latestPlacemark: CLPlacemark?
var onLatestPlacemarkUpdate: (() -> ())?
var shouldStopOnUpdate: Bool = true
func start() {
locationManager.requestWhenInUseAuthorization()
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
locationManager.delegate = self
locationManager.startUpdatingLocation()
}
func stop() {
locationManager.stopUpdatingLocation()
}
fileprivate func updatePlacemark(for location: CLLocation) {
geocoder.reverseGeocodeLocation(location) { [weak self] placemarks, error in
if let placemark = placemarks?.first {
self?.latestPlacemark = placemark
self?.onLatestPlacemarkUpdate?()
if self?.shouldStopOnUpdate ?? false {
self?.stop()
}
}
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.last {
updatePlacemark(for: location)
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("CurrentPlacemarkUpdater: \(error)")
}
}
// place the function code below in desire location in program.
// [self getCurrentLocation];
-(void)getCurrentLocation
{
CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
[geocoder reverseGeocodeLocation:self->locationManager.location
completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(@"reverseGeocodeLocation:completionHandler: Completion Handler called!");
if (error){
NSLog(@"Geocode failed with error: %@", error);
return;
}
CLPlacemark *placemark = [placemarks objectAtIndex:0];
NSLog(@"placemark.ISOcountryCode %@",placemark.ISOcountryCode);
NSLog(@"placemark.country %@",placemark.country);
NSLog(@"placemark.locality %@",placemark.locality );
NSLog(@"placemark.postalCode %@",placemark.postalCode);
NSLog(@"placemark.administrativeArea %@",placemark.administrativeArea);
NSLog(@"placemark.locality %@",placemark.locality);
NSLog(@"placemark.subLocality %@",placemark.subLocality);
NSLog(@"placemark.subThoroughfare %@",placemark.subThoroughfare);
}];
}