Swift

Question

我正在尝试在 Swift 3 中使用 CLGeocoder 生成格式化的完整地址。我参考了此线程以获取下面给出的代码。

但是，有时应用程序会崩溃并在以下行显示 'nil' 错误：

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

问题：

如何连接从 GeoCoder 检索到的这些值以形成完整地址？（街道 + 城市 + 等）
当 func 无法找到地址时，如何处理出现的 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;
    }

Answer 1

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)
              }
        })

    }

Answer 2

要连接，您只需将 return address 替换为：

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

Answer 3

为了修复空地址问题，您可以使用 class 属性来保存附加值，或者您可以使用闭包将 return 值返回给调用方函数
为了修复崩溃，您需要避免强制解包可选值

使用闭包你可以这样做：

// Using closure
func getAddress(handler: @escaping (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)
    })
}

您可以像这样调用方法：

getAddress { (address) in
    print(address)
}

Answer 4

这是我的代码 swift 3

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
                }
            }
        }
  }

你可以很容易地调用上面的函数：

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

Answer 5

保持简单 - 完整的 Swift 3 & 4 兼容视图控制器示例，用于从用户位置获取格式化地址字符串（如果您需要更多信息，请添加 CLPlacemark 中可用的其他键在你的字符串中）：

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

不要忘记事先将 隐私 - 使用时的位置使用说明 添加到您的 Info.plist 文件中，以允许用户授予授予您的应用使用定位服务的权限。

Answer 6

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，让 Apple 处理差异。

从iOS11开始，可以得到一个联系人框架地址：

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，此功能在 XCode 代码完成中对您不可见，直到您

import Contacts

有了这个额外的导入，你可以做类似

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)
    }
}

并获取以地址中国家/地区的格式格式化的地址。

格式化程序甚至支持格式化为 attributedString。

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

Answer 7

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)}
})

Answer 8

我为地理编码创建了自己的静态 class 并获取了 CLPlacemark 的属性并获得了完整的地址，例如 "usually" returns 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

Answer 9

这里是 2-3 行版本的答案：

    func getAddress(placemarks: [CLPlacemark]) -> String {
        guard let placemark = placemarks.first, !placemarks.isEmpty else {return ""}
        let outputString = [placemark.locality,
                            placemark.subLocality,
                            placemark.thoroughfare,
                            placemark.postalCode,
                            placemark.subThoroughfare,
                            placemark.country].compactMap{[=10=]}.joined(separator: ", ")
        print(outputString)
        return outputString
    }

Answer 10

func convertLatLongToAddress(latitude:Double, longitude:Double) {
    let geoCoder = CLGeocoder()
    let location = CLLocation(latitude: latitude, longitude: longitude)
    var labelText = ""
    geoCoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in

        var placeMark: CLPlacemark!
        placeMark = placemarks?[0]

        if placeMark != nil {
            if let name = placeMark.name {
                labelText = name
            }
            if let subThoroughfare = placeMark.subThoroughfare {
                if (subThoroughfare != placeMark.name) && (labelText != subThoroughfare) {
                    labelText = (labelText != "") ? labelText + "," + subThoroughfare : subThoroughfare
                }
            }
            if let subLocality = placeMark.subLocality {
                if (subLocality != placeMark.subThoroughfare) && (labelText != subLocality) {
                    labelText = (labelText != "") ? labelText + "," + subLocality : subLocality
                }
            }
            if let street = placeMark.thoroughfare {
                if (street != placeMark.subLocality) && (labelText != street) {
                    labelText = (labelText != "") ? labelText + "," + street : street
                }
            }
            if let locality = placeMark.locality {
                if (locality != placeMark.thoroughfare) && (labelText != locality) {
                    labelText = (labelText != "") ? labelText + "," + locality : locality
                }
            }
            if let city = placeMark.subAdministrativeArea {
                if (city != placeMark.locality) && (labelText != city) {
                    labelText = (labelText != "") ? labelText + "," + city : city
                }
            }
            if let state = placeMark.postalAddress?.state {
                if (state != placeMark.subAdministrativeArea) && (labelText != state) {
                    labelText = (labelText != "") ? labelText + "," + state : state
                }

            }
            if let country = placeMark.country {
                labelText = (labelText != "") ? labelText + "," + country : country
            }
            // labelText gives you the address of the place
        }
    })
}

作为改进，我还添加了地名。它使地址更有意义。

Answer 11

func getAddress(from coordinate: CLLocationCoordinate2D, completion: @escaping (String) -> Void) {
        let geoCoder = CLGeocoder()
        let location = CLLocation.init(latitude: coordinate.latitude, longitude: coordinate.longitude)
        
        geoCoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in
            
            // check for errors
            guard let placeMarkArr = placemarks else {
                completion("")
                debugPrint(error ?? "")
                return
            }
            // check placemark data existence
            
            guard let placemark = placeMarkArr.first, !placeMarkArr.isEmpty else {
                completion("")
                return
            }
            // create address string
            
            let outputString = [placemark.locality,
                                placemark.subLocality,
                                placemark.thoroughfare,
                                placemark.postalCode,
                                placemark.subThoroughfare,
                                placemark.country].compactMap { [=10=] }.joined(separator: ", ")
            
            completion(outputString)
        })
    }

Answer 12

 func getAddressFromlatLong(lat: Double, long: Double, completion: @escaping (_ address: String) -> Void){
    let coordinate = CLLocationCoordinate2D(latitude: lat, longitude: long)
    let geocoder = GMSGeocoder()
    var add = ""
    geocoder.reverseGeocodeCoordinate(coordinate) { (response, error) in
      if let address = response?.firstResult() {
        
        guard let arrAddress = address.lines else {return}
        if arrAddress.count > 1 {
            add =  /(arrAddress[0]) + ", " + /(arrAddress[1])
    
        }else if arrAddress.count == 1 {
            add =  /(arrAddress[0])
        }
        completion(add)
      }
    }
  }

Swift - 从反向地理编码生成地址格式

Swift - Generate an Address Format from Reverse Geocoding

xcode

google-maps

reverse-geocoding

ios