Swift - 从反向地理编码生成地址格式

问题描述 投票:15回答:8

我试图使用Swift 3中的CLGeocoder生成格式化的完整地址。我引用了这个SO线程来获取下面给出的代码。

但是,有时应用程序崩溃时会出现“nil”错误:

//Address dictionary
print(placeMark.addressDictionary ?? "")

问题:

  1. 如何连接从GeoCoder检索到的这些值以形成完整地址? (街+城+等)
  2. 当func无法找到地址时,如何处理我得到的nil错误?

完整代码:

func getAddress() -> String {
        var address: String = ""

        let geoCoder = CLGeocoder()
        let location = CLLocation(latitude: selectedLat, longitude: selectedLon)
        //selectedLat and selectedLon are double values set by the app in a previous process

        geoCoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in

            // Place details
            var placeMark: CLPlacemark!
            placeMark = placemarks?[0]

            // Address dictionary
            //print(placeMark.addressDictionary ?? "")

            // Location name
            if let locationName = placeMark.addressDictionary!["Name"] as? NSString {
                //print(locationName)
            }

            // Street address
            if let street = placeMark.addressDictionary!["Thoroughfare"] as? NSString {
                //print(street)
            }

            // City
            if let city = placeMark.addressDictionary!["City"] as? NSString {
                //print(city)
            }

            // Zip code
            if let zip = placeMark.addressDictionary!["ZIP"] as? NSString {
                //print(zip)
            }

            // Country
            if let country = placeMark.addressDictionary!["Country"] as? NSString {
                //print(country)
            }

        })

        return address;
    } 
ios google-maps swift3 xcode8 reverse-geocoding
8个回答
53
投票
func getAddressFromLatLon(pdblLatitude: String, withLongitude pdblLongitude: String) {
        var center : CLLocationCoordinate2D = CLLocationCoordinate2D()
        let lat: Double = Double("\(pdblLatitude)")!
        //21.228124
        let lon: Double = Double("\(pdblLongitude)")!
        //72.833770
        let ceo: CLGeocoder = CLGeocoder()
        center.latitude = lat
        center.longitude = lon

        let loc: CLLocation = CLLocation(latitude:center.latitude, longitude: center.longitude)


        ceo.reverseGeocodeLocation(loc, completionHandler:
            {(placemarks, error) in
                if (error != nil)
                {
                    print("reverse geodcode fail: \(error!.localizedDescription)")
                }
                let pm = placemarks! as [CLPlacemark]

                if pm.count > 0 {
                    let pm = placemarks![0]
                    print(pm.country)
                    print(pm.locality)
                    print(pm.subLocality)
                    print(pm.thoroughfare)
                    print(pm.postalCode)
                    print(pm.subThoroughfare)
                    var addressString : String = ""
                    if pm.subLocality != nil {
                        addressString = addressString + pm.subLocality! + ", "
                    }
                    if pm.thoroughfare != nil {
                        addressString = addressString + pm.thoroughfare! + ", "
                    }
                    if pm.locality != nil {
                        addressString = addressString + pm.locality! + ", "
                    }
                    if pm.country != nil {
                        addressString = addressString + pm.country! + ", "
                    }
                    if pm.postalCode != nil {
                        addressString = addressString + pm.postalCode! + " "
                    }


                    print(addressString)
              }
        })

    }

10
投票

格式化地址很难,因为每个国家/地区都有自己的格式。

只需几行代码,您就可以获得每个国家/地区的正确地址格式,并让Apple处理这些差异。

从iOS 11开始,您可以获得一个Contacts框架地址:

extension CLPlacemark {
    @available(iOS 11.0, *)
    open var postalAddress: CNPostalAddress? { get }
}

此扩展是Contacts框架的一部分。这意味着,在您执行XCode代码完成之前,此功能对您来说是不可见的

import Contacts

通过这个额外的导入,你可以做类似的事情

CLGeocoder().reverseGeocodeLocation(location, preferredLocale: nil) { (clPlacemark: [CLPlacemark]?, error: Error?) in
    guard let place = clPlacemark?.first else {
        print("No placemark from Apple: \(String(describing: error))")
        return
    }

    let postalAddressFormatter = CNPostalAddressFormatter()
    postalAddressFormatter.style = .mailingAddress
    var addressString: String?
    if let postalAddress = place.postalAddress {
        addressString = postalAddressFormatter.string(from: postalAddress)
    }
}

并获取地址中国家/地区格式的格式。

格式化程序甚至支持格式化为attributionString。

在iOS 11之前,您可以自己将CLPlacemark转换为CNPostalAddress,并且仍然可以使用CNPostalAddressFormatter的国家/地区特定格式。


6
投票

这是我的swift 3代码

func getAdressName(coords: CLLocation) {

    CLGeocoder().reverseGeocodeLocation(coords) { (placemark, error) in
            if error != nil {
                print("Hay un error")
            } else {

                let place = placemark! as [CLPlacemark]
                if place.count > 0 {
                    let place = placemark![0]
                    var adressString : String = ""
                    if place.thoroughfare != nil {
                        adressString = adressString + place.thoroughfare! + ", "
                    }
                    if place.subThoroughfare != nil {
                        adressString = adressString + place.subThoroughfare! + "\n"
                    }
                    if place.locality != nil {
                        adressString = adressString + place.locality! + " - "
                    }
                    if place.postalCode != nil {
                        adressString = adressString + place.postalCode! + "\n"
                    }
                    if place.subAdministrativeArea != nil {
                        adressString = adressString + place.subAdministrativeArea! + " - "
                    }
                    if place.country != nil {
                        adressString = adressString + place.country!
                    }

                    self.lblPlace.text = adressString
                }
            }
        }
  }

您可以轻松上传以上功能:

let cityCoords = CLLocation(latitude: newLat, longitude: newLon)
cityData(coord: cityCoords)

2
投票

要连接你可以简单地用这个替换return address

return "\(locationName), \(street), \(city), \(zip), \(country)"

2
投票

保持简单 - 一个完整的Swift 3和4兼容View Controller示例,用于从用户的位置获取格式化的地址字符串(如果您想在字符串中添加更多信息,请添加CLPlacemark中提供的其他键):

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

let manager = CLLocationManager()
let geocoder = CLGeocoder()

var locality = ""
var administrativeArea = ""
var country = ""

override func viewDidLoad() {
    super.viewDidLoad()

    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.requestWhenInUseAuthorization()
    manager.startUpdatingLocation()

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let location = locations[0]
        manager.stopUpdatingLocation()

    geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) in
        if (error != nil) {
            print("Error in reverseGeocode")
            }

        let placemark = placemarks! as [CLPlacemark]
        if placemark.count > 0 {
            let placemark = placemarks![0]
            self.locality = placemark.locality!
            self.administrativeArea = placemark.administrativeArea!
            self.country = placemark.country!
        }
    })
}

func userLocationString() -> String {
    let userLocationString = "\(locality), \(administrativeArea), \(country)"
    return userLocationString
}

}

在此示例中调用print(userLocationString())将打印:郊区,州,国家/地区

不要忘记事先在您的Info.plist文件中添加隐私 - 使用时位置使用说明,以允许用户授予您的应用使用位置服务的权限。


1
投票
  1. 要修复空地址问题,您可以使用类属性来保存附加值,也可以使用闭包将值返回给调用函数
  2. 为了解决崩溃问题,您需要避免强制解开选项

使用闭包你可以这样做:

// Using closure
func getAddress(handler: (String) -> Void)
{
    var address: String = ""
    let geoCoder = CLGeocoder()
    let location = CLLocation(latitude: selectedLat, longitude: selectedLon)
    //selectedLat and selectedLon are double values set by the app in a previous process

    geoCoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in

        // Place details
        var placeMark: CLPlacemark?
        placeMark = placemarks?[0]

        // Address dictionary
        //print(placeMark.addressDictionary ?? "")

        // Location name
        if let locationName = placeMark?.addressDictionary?["Name"] as? String {
            address += locationName + ", "
        }

        // Street address
        if let street = placeMark?.addressDictionary?["Thoroughfare"] as? String {
            address += street + ", "
        }

        // City
        if let city = placeMark?.addressDictionary?["City"] as? String {
            address += city + ", "
        }

        // Zip code
        if let zip = placeMark?.addressDictionary?["ZIP"] as? String {
            address += zip + ", "
        }

        // Country
        if let country = placeMark?.addressDictionary?["Country"] as? String {
            address += country
        }

       // Passing address back
       handler(address)
    })
}

您可以调用以下方法:

getAddress { (address) in
    print(address)
}

0
投票
CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: vehicleLocation.latitude, longitude: vehicleLocation.latitude), completionHandler: {(placemarks, error) -> Void in

  guard error == nil else {completionHandler(nil); return}

  guard let place = placemarks else {completionHandler(nil); return}

  if place.count > 0 {
    let pm = place[0]

    var addArray:[String] = []
    if let name = pm.name {
      addArray.append(name)
    }
    if let thoroughfare = pm.thoroughfare {
      addArray.append(thoroughfare)
    }
    if let subLocality = pm.subLocality {
      addArray.append(subLocality)
    }
    if let locality = pm.locality {
      addArray.append(locality)
    }
    if let subAdministrativeArea = pm.subAdministrativeArea {
      addArray.append(subAdministrativeArea)
    }
    if let administrativeArea = pm.administrativeArea {
      addArray.append(administrativeArea)
    }
    if let country = pm.country {
      addArray.append(country)
    }
    if let postalCode = pm.postalCode {
      addArray.append(postalCode)
    }

    let addressString = addArray.joined(separator: ",\n")

    print(addressString)

    completionHandler(addressString)
  }
  else { completionHandler(nil)}
})

0
投票

我为Geocoding创建了自己的静态类并获取了CLPlacemark的属性并获得了一个完整的地址,比如“通常”返回Google:

import Foundation
import CoreLocation

class ReverseGeocoding {

    static func geocode(latitude: Double, longitude: Double, completion: @escaping (CLPlacemark?, _ completeAddress: String?, Error?) -> ())  {
        CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude)) { placemarks, error in
            guard let placemark = placemarks?.first, error == nil else {
                completion(nil, nil, error)
                return
            }

            let completeAddress = getCompleteAddress(placemarks)

            completion(placemark, completeAddress, nil)
        }
    }

    static private func getCompleteAddress(_ placemarks: [CLPlacemark]?) -> String {
        guard let placemarks = placemarks else {
            return ""
        }

        let place = placemarks as [CLPlacemark]
        if place.count > 0 {
            let place = placemarks[0]
            var addressString : String = ""
            if place.thoroughfare != nil {
                addressString = addressString + place.thoroughfare! + ", "
            }
            if place.subThoroughfare != nil {
                addressString = addressString + place.subThoroughfare! + ", "
            }
            if place.locality != nil {
                addressString = addressString + place.locality! + ", "
            }
            if place.postalCode != nil {
                addressString = addressString + place.postalCode! + ", "
            }
            if place.subAdministrativeArea != nil {
                addressString = addressString + place.subAdministrativeArea! + ", "
            }
            if place.country != nil {
                addressString = addressString + place.country!
            } 

            return addressString
        }
        return ""
    }
}

然后执行:

    ReverseGeocoding.geocode(coordinate: coordinate, completion: { (placeMark, completeAddress, error) in

        if let placeMark = placeMark, let completeAddress = completeAddress {
            print(placeMark.postalCode)
            print(placeMark)
            print(completeAddress)
        } else {
            // do something with the error
        }

最后打印:

15172
Calle del Arenal, 4, Calle del Arenal, 4, 15172 Oleiros, A Coruña, España @ <+43.33190337,-8.37144380> +/- 100.00m, region CLCircularRegion (identifier:'<+43.33190337,-8.37144380> radius 70.84', center:<+43.33190337,-8.37144380>, radius:70.84m)
Calle del Arenal, 4, Oleiros, 15172, A Coruña, España
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