如何获取用户当前的城市名称？

Answers:

107

您要做的是设置一个CLLocationManager可以找到您当前坐标的坐标。使用当前坐标，您需要使用它MKReverseGeoCoder来找到您的位置。

- (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);
}
— 托尼·梁
source
9
注意事项：您必须将位置管理器存放在ivar中（可能在收到位置后再次将其停止），否则它将立即自动释放，并且不会收到任何委托回调。此外，反向地址解析器需要Internet连接才能工作。
— uliwitness 2011年
您能说我如何在图钉上的标题和副标题中打印当前城市或位置吗？
— 拉朱
1
@Frade #import <AddressBook / AddressBook.h>
— Jonathan
18
自ios 5.0起不推荐使用MKReverseGeoCoder
— 2013年
Frade，我希望您能说出发现的内容...叹息
— David
122

自iOS 5起MKReverseGeoCoder已弃用！

因此，您想使用CLGeocoderwith CLLocationManager，非常简单，并且可以使用block。

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];
                       }
                   }];
}

编辑：除了for in循环，您还可以执行以下操作：

NSString *locString = placemarks.count ? [placemarks.firstObject locality] : @"Not Found";
— 马克
source
28

这对我来说很好 

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);

               }];
— 高拉夫
source
为什么返回数组？奇怪。不管怎么说，还是要谢谢你。
— 亚当·怀特
这是光滑的，爱挡。我将条件标记放在地标数组上，以确保objectatindex：0确实存在。
— capikaw
4
您好，我收到一个错误消息kCLErrorDomain error 8，您知道为什么吗？
— maxisme 2014年
CLGeoCoder尚未宣布我必须要做的事情，因此它可能适用于导入和添加内容
— iOS开发人员
16

如果有人试图从MKReverseGeocoder转到CLGeocoder，那么我写了一篇博客文章，可能对您有帮助http://jonathanfield.me/jons-blog/clgeocoder-example.html

基本上，一个示例是，在创建locationManager和CLGeocoder对象之后，只需将此代码添加到viewDidLoad（）中，然后创建一些标签或文本区域即可显示数据。

  [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;



     }];
— 乔纳森·菲尔德
source
@macayer是的，如果为空，将崩溃，但是如果我理解正确的话，它将永远不会为空。将包含1个或多个元素，或者将是nil和发送到nil结果的消息nil，以及通过标记的属性访问nil。话虽如此，应该经常检查是否error为非nil。
— 维克多·扎曼尼安
3

如果有人在Swift 3中需要它，这就是我的方法：

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!)"
        }
    }
}
— 宝拉·哈斯滕特菲尔
source
3

设置CLLocationManager后，您将获得位置更新为纬度/经度对。然后，您可以使用CLGeocoder将坐标转换为用户友好的地名。

这是Swift 4中的示例代码。

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()
                }
            }
        }
    }
}
— 迈克尔·王
source
2

您必须获取用户的当前位置，然后使用MKReverseGeocoder识别城市。

《iPhone应用程序编程指南》第8章中有一个很好的例子。一旦您完成位置初始化地理编码器，设置代表并从地标中读取国家/地区。阅读有关MKReverseGeocodeDelegate的文档并创建方法：

  • reverseGeocoder：didFindPlacemark：

  • reverseGeocoder：didFailWithError：

    MKReverseGeocoder *geocoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
geocoder.delegate = self;
[geocoder start];
— 马辛·兹比约夫斯基（Marcin Zbijowski）
source
1

您可以使用以下代码获取当前城市：

扩展YourController：CLLocationManagerDelegate {func locationManager（管理器：CLLocationManager，didUpdateLocations位置：[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
    }
}
— Anand Kr。阿瓦斯蒂
source
0 
// 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);

                   }];
}
— 罗伯特·威廉·克兰西
source
0

这是我的小型Swift类，可帮助我获取有关当前位置的反向地理编码信息。不要忘记的NSLocationWhenInUseUsageDescription领域Info.plist。

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)")
    }

}
— 帖木儿·伯尼科维奇
source
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