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Géocodage inversé dans Swift 4

J'essaie d'écrire une méthode simple qui est nourrie avec CLLocationDegrees et retourne une CLPlacemark. En regardant la documentation d'Apple , cela semble être une tâche simple.

Voici ce que j'ai jeté dans un terrain de jeu:

import CoreLocation
// this is necessary for async code in a playground
import PlaygroundSupport 

// this is necessary for async code in a playground
PlaygroundPage.current.needsIndefiniteExecution = true

func geocode(latitude: CLLocationDegrees, longitude: CLLocationDegrees) -> CLPlacemark? {
  let location = CLLocation(latitude: latitude, longitude: longitude)
  let geocoder = CLGeocoder()

  var placemark: CLPlacemark?

  geocoder.reverseGeocodeLocation(location) { (placemarks, error) in
    if error != nil {
      print("something went horribly wrong")
    }

    if let placemarks = placemarks {
      placemark = placemarks.first
    }
  }

  return placemark
}

let myPlacemark = geocode(latitude: 37.3318, longitude: 122.0312)

Dans l'état actuel des choses, ma méthode renvoie zéro. Je ne suis pas sûr de savoir où se situe mon erreur, mais je suis convaincu que c'est quelque chose d'étrange stupide de ma part. Merci pour la lecture.

iosswiftcllocationmanager
9
Adrian
import UIKit
import CoreLocation
import PlaygroundSupport
PlaygroundPage.current.needsIndefiniteExecution = true

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

ou simplement:

func geocode(latitude: Double, longitude: Double, completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {
    CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: completion)
}

ou extension de CLLocation:

extension CLLocation {
    func geocode(completion: @escaping (_ placemark: [CLPlacemark]?, _ error: Error?) -> Void)  {
        CLGeocoder().reverseGeocodeLocation(self, completionHandler: completion)
    }
}

Pour formater votre marque de repère comme adresse postale, vous pouvez utiliser la structure de contacts CNPostalAddressFormatter:

import Contacts

extension Formatter {
    static let mailingAddress: CNPostalAddressFormatter = {
        let formatter = CNPostalAddressFormatter()
        formatter.style = .mailingAddress
        return formatter
    }()
}

extension CLPlacemark {
    var mailingAddress: String? {
        return postalAddress?.mailingAddress
    }
}

extension CNPostalAddress {
    var mailingAddress: String {
        return Formatter.mailingAddress.string(from: self)
    }
}

repère

Contient un tableau d'objets CLPlacemark. Pour la plupart des demandes de géocodage, Ce tableau ne doit contenir qu'une seule entrée. Cependant, géocodage en aval les demandes peuvent renvoyer plusieurs objets de repère dans les situations où le l'adresse spécifiée n'a pas pu être résolue en un seul endroit. Si la la demande a été annulée ou une erreur s’est produite lors de l’obtention du repère information, ce paramètre est nul.

Pour plus d'informations sur les propriétés de CLPlacemark, vous pouvez vérifier ceci CLPlacemark

Usage:

let location = CLLocation(latitude: -22.963451, longitude: -43.198242)
location.geocode { placemark, error in
    if let error = error as? CLError {
        print("CLError:", error)
        return
    } else if let placemark = placemark?.first {
        // you should always update your UI in the main thread
        DispatchQueue.main.async {
            //  update UI here
            print("name:", placemark.name ?? "unknown")

            print("address1:", placemark.thoroughfare ?? "unknown")
            print("address2:", placemark.subThoroughfare ?? "unknown")
            print("neighborhood:", placemark.subLocality ?? "unknown")
            print("city:", placemark.locality ?? "unknown")

            print("state:", placemark.administrativeArea ?? "unknown")
            print("subAdministrativeArea:", placemark.subAdministrativeArea ?? "unknown")
            print("Zip code:", placemark.postalCode ?? "unknown")
            print("country:", placemark.country ?? "unknown", terminator: "\n\n")

            print("isoCountryCode:", placemark.isoCountryCode ?? "unknown")
            print("region identifier:", placemark.region?.identifier ?? "unknown")

            print("timezone:", placemark.timeZone ?? "unknown", terminator:"\n\n")

            // Mailind Address
            print(placemark.mailingAddress ?? "unknown")
        }
    }
}

Cela va imprimer

name: Morro da Saudade
address1: Rua Casuarina
address2: 597
neighborhood: Lagoa
city: Rio de Janeiro
state: RJ
subAdministrativeArea: unknown
Zip code: 22011-040
country: Brazil

isoCountryCode: BR
region identifier: <-22.96345100,-43.19824200> radius 141.83
timezone: America/Sao_Paulo (current)

Rua Casuarina, 597

Lagoa

Rio de Janeiro RJ

22011-040

Brésil

21
Leo Dabus

Il y a tellement de questions portant sur 'reverseGeocodeLocation' sur Stack Overflow, j'en ai vu tellement. J'utilise Swift 4.2 et je pensais que mes requêtes 'reverseGeocodeLocation' pouvaient arriver à expiration. Eh bien, ce n'est pas le cas, lorsque vous commencez à vous déplacer avec un iPhone, les cycles 'didUpdateLocations' doivent mûrir. Deux cycles ou plus peuvent être nécessaires avant que 'reverseGeocodeLocation' ne renvoie des repères.

J'ai écrit une application simple qui utilise "reverseGeocodeLocation" jusqu'à ce que "repères" soit renvoyé après des cycles répétés "didUpdateLocations". Ceci est mon propre 'SampleCode'. J'ai beaucoup appris en utilisant l'application. Cela pourrait aider les autres à comprendre le fonctionnement des demandes de géocodage inversé dans le monde réel.

S'il vous plaît donner vos commentaires sur les améliorations possibles. Ce code est donné et pris librement.

import Foundation
import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {
    @IBAction func RefreshLocationButton(_ sender: Any) {
        self.requestingPlacemark = true
        self.placemarkData = nil
        //^Make another Placemark Request
        self.requestCounter = 0
        self.RequestCounterLabel.text = ""
        self.LocationLabel.text = ""
        self.PlacemarkLabel.text = ""}
    @IBOutlet weak var LocationCounterLabel: UILabel!
    @IBOutlet weak var RequestCounterLabel: UILabel!
    @IBOutlet weak var LocationLabel: UILabel!
    @IBOutlet weak var PlacemarkLabel: UILabel!
    let locationManager = CLLocationManager()
    var placemarkData: CLPlacemark!
    var placemarkString: String!
    var printPlacemarkData: Bool!
    var didUpdateLocationsCounter: Int = 0
    var requestCounter: Int = 0
    var requestingPlacemark: Bool = true

override func viewDidLoad() {
    super.viewDidLoad()
    if CLLocationManager.locationServicesEnabled() {
        locationManager.requestAlwaysAuthorization()
        locationManager.delegate = self
        //locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation
        locationManager.startUpdatingLocation()
        self.RequestCounterLabel.text = ""
        self.LocationLabel.text = ""
        self.PlacemarkLabel.text = ""}}
func printPlacemarks() {
    if printPlacemarkData {
        self.placemarkString = "Placemark Data:"
        self.placemarkString = buildPlacemarkString(item: 1)
        self.placemarkString = buildPlacemarkString(item: 2)
        self.placemarkString = buildPlacemarkString(item: 3)
        self.placemarkString = buildPlacemarkString(item: 4)
        self.placemarkString = buildPlacemarkString(item: 5)
        self.placemarkString = buildPlacemarkString(item: 6)
        self.placemarkString = buildPlacemarkString(item: 7)
        self.placemarkString = buildPlacemarkString(item: 8)
        self.placemarkString = buildPlacemarkString(item: 9)
        self.placemarkString = buildPlacemarkString(item: 10)
        self.PlacemarkLabel.text = self.placemarkString
        self.printPlacemarkData = false}}
func buildPlacemarkString(item: Int) -> String {
    var elementText: String!
    var newString: String!
        switch item {
        case 1: elementText = "name: " + self.placemarkData.name!
        case 2: elementText = "subThoroughfare: " + self.placemarkData.subThoroughfare!
        case 3: elementText = "thoroughfare: " + self.placemarkData.thoroughfare!
        case 4: elementText = "postalCode: " + self.placemarkData.postalCode!
        case 5: elementText = "subLocality: " + self.placemarkData.subLocality!
        case 6: elementText = "locality: " + self.placemarkData.locality!
        case 7: elementText = "subAdministrativeArea: " + self.placemarkData.subAdministrativeArea!
        case 8: elementText = "administrativeArea: " + self.placemarkData.administrativeArea!
        case 9: elementText = "country: " + self.placemarkData.country!
        case 10: elementText = "isoCountryCode: " + self.placemarkData.isoCountryCode!
        default: print("Error: incorrect item number!")}
        newString = self.placemarkString + "\n" + elementText
    return newString
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        //location prints one time and 'didUpdateLocations' is stopped:
    self.didUpdateLocationsCounter = self.didUpdateLocationsCounter + 1
    let labelString = String(describing: self.didUpdateLocationsCounter)
    self.LocationCounterLabel.text = "Location Update Counter: " + labelString
    if self.placemarkData == nil {
        //location variable:
        self.requestCounter = self.requestCounter + 1
        let textString = String(describing: self.requestCounter)
        self.RequestCounterLabel.text = "Request Counter: " + textString
        if locations.count == 0 {
            self.LocationLabel.text = "Locations: There was NONE"}
        else {
            if locations.count > 0 {
                let coordinate2D: CLLocation = locations.first!
                let location = CLLocation(latitude: coordinate2D.coordinate.latitude, longitude: coordinate2D.coordinate.longitude)
                let printString = String(describing: location)
                self.LocationLabel.text = "Location: " + printString
                let geocoder: CLGeocoder = CLGeocoder()
                geocoder.reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in
                    if error != nil {
                        let errorString = String(describing: error?.localizedDescription)
                        print("reverse geodcode fail: \(errorString)")
                        self.LocationCounterLabel.text = ""
                        self.RequestCounterLabel.text = ""
                        self.LocationLabel.text = "Reverse Geodcode fail: \(errorString)"
                        self.PlacemarkLabel.text = ""
                        self.requestingPlacemark = false
                        return}
                    else {
                        let pm = placemarks! as [CLPlacemark]
                        //There is ALWAYS 'placemarks' Data
                        if pm.count > 0 {
                            self.placemarkData = placemarks![0]
                            self.printPlacemarkData = true
                            self.printPlacemarks()
                            self.requestingPlacemark = false}}})}
            else {
                if self.requestingPlacemark {
                    self.LocationLabel.text = "Problem: There is no 'location.first'"}}}}}}

Et puis l'interface utilisateur du Storyboard:

Storyboard Image

Voir l'image du contrôleur

<?xml version="1.0" encoding="UTF-8"?>
<document type="com.Apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.Apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--View Controller-->
        <scene sceneID="tne-QT-ifu">
            <objects>
                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="MyThoroughfare" customModuleProvider="target" sceneMemberID="viewController">
                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Counter" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ZIg-u9-TMR">
                                <rect key="frame" x="16" y="20" width="343" height="20.5"/>
                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location Count Label" lineBreakMode="tailTruncation" numberOfLines="2" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="csF-KS-xGE">
                                <rect key="frame" x="16" y="48" width="343" height="20.5"/>
                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Location String" lineBreakMode="tailTruncation" numberOfLines="8" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="qOc-gk-gSp">
                                <rect key="frame" x="16" y="76" width="343" height="20.5"/>
                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Placemark String" lineBreakMode="tailTruncation" numberOfLines="14" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="42A-nO-tNf">
                                <rect key="frame" x="16" y="104" width="343" height="20.5"/>
                                <color key="backgroundColor" red="0.80000001190000003" green="0.80000001190000003" blue="0.80000001190000003" alpha="1" colorSpace="calibratedRGB"/>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <nil key="textColor"/>
                                <nil key="highlightedColor"/>
                            </label>
                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HgN-oB-ds0">
                                <rect key="frame" x="121.5" y="578" width="132" height="30"/>
                                <state key="normal" title="Request Placemark"/>
                                <connections>
                                    <action selector="RefreshLocationButton:" destination="BYZ-38-t0r" eventType="touchUpInside" id="izY-S5-wjg"/>
                                </connections>
                            </button>
                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <constraints>
                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="6HO-kN-l1z"/>
                            <constraint firstItem="qOc-gk-gSp" firstAttribute="top" secondItem="csF-KS-xGE" secondAttribute="bottom" constant="7.5" id="6ux-dx-gJr"/>
                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="42A-nO-tNf" secondAttribute="trailing" constant="16" id="8dG-gV-Cob"/>
                            <constraint firstItem="HgN-oB-ds0" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="A38-Nt-i3D"/>
                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ZIg-u9-TMR" secondAttribute="trailing" constant="16" id="Bb0-YC-oov"/>
                            <constraint firstItem="csF-KS-xGE" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="FJU-ha-HkL"/>
                            <constraint firstItem="42A-nO-tNf" firstAttribute="top" secondItem="qOc-gk-gSp" secondAttribute="bottom" constant="7.5" id="SpR-XB-MLG"/>
                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="HgN-oB-ds0" secondAttribute="bottom" constant="59" id="Vr6-QE-230"/>
                            <constraint firstItem="42A-nO-tNf" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="aHo-kJ-aCb"/>
                            <constraint firstItem="csF-KS-xGE" firstAttribute="top" secondItem="ZIg-u9-TMR" secondAttribute="bottom" constant="7.5" id="c63-Mq-ItW"/>
                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="csF-KS-xGE" secondAttribute="trailing" constant="16" id="dlV-Hc-8XJ"/>
                            <constraint firstItem="qOc-gk-gSp" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="16" id="m5y-Q8-jxI"/>
                            <constraint firstItem="ZIg-u9-TMR" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="sdw-WQ-Bx9"/>
                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="qOc-gk-gSp" secondAttribute="trailing" constant="16" id="woB-ig-i5v"/>
                        </constraints>
                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
                    </view>
                    <connections>
                        <outlet property="LocationCounterLabel" destination="ZIg-u9-TMR" id="K4g-WT-f82"/>
                        <outlet property="LocationLabel" destination="qOc-gk-gSp" id="Cdw-bw-EWt"/>
                        <outlet property="PlacemarkLabel" destination="42A-nO-tNf" id="dMh-bw-cRE"/>
                        <outlet property="RequestCounterLabel" destination="csF-KS-xGE" id="ai6-zn-Toi"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="53.600000000000001" y="66.11694152923539"/>
        </scene>
    </scenes>
</document>
0
B. Wason