獲取經度和緯度

Question

我在美國使用它時遇到了應用程序崩潰。在所有其他國家，相同的代碼正在工作。崩潰是發生在行：

let latitude = String(format: "%.7f", currentLocation.coordinate.latitude) 

我實在看不出有什麼問題，特別是COS涉及美國，而不是其他縣。任何幫助將非常感激。

我UserLocation.swift看起來是這樣的：

import UIKit 
import MapKit 

public class GPSLocation { 

static let sharedInstance = GPSLocation() 

//MARK: Public variables 

public var intermediateLatitude: String? 
public var intermediateLongitude: String? 
public var intermediateCountry: String? 
public var intermediateCity: String? 
public var intermediateTimeZone: String? 

//MARK: Get Longitude, Country Code and City name 

func getGPSLocation(completition: @escaping() -> Void) { 

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 

     let locManager = manager 
     var currentLocation: CLLocation! 
     locManager.desiredAccuracy = kCLLocationAccuracyBest 

     if (CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedWhenInUse || CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedAlways) { 

      currentLocation = locManager.location 

      if currentLocation != nil { 
       // Get longitude & latitude 
       let latitude = String(format: "%.7f", currentLocation.coordinate.latitude) 
       let longitude = String(format: "%.7f", currentLocation.coordinate.longitude) 
       self.intermediateLatitude = latitude 
       self.intermediateLongitude = longitude 
       // debugPrint("Latitude:",latitude) 
       // debugPrint("Longitude:",longitude) 

       // Get local time zone GMT 
       let localTimeZoneAbbreviation = TimeZone.current.abbreviation() ?? "" // "GMT-2" 
       let indexStartOfText = localTimeZoneAbbreviation.index(localTimeZoneAbbreviation.startIndex, offsetBy: 3) // 3 
       let timeZone = localTimeZoneAbbreviation.substring(from: indexStartOfText) // "-2" 
       self.intermediateTimeZone = timeZone 
       // debugPrint("GMT:",timeZone) 

       // Get Country code and City 
       let location = CLLocation(latitude: currentLocation.coordinate.latitude, longitude: currentLocation.coordinate.longitude) 
       fetchCountryAndCity(location: location) { countryCode, city in 
        self.intermediateCountry = countryCode 
        self.intermediateCity = city 
        // debugPrint("Country code:",countryCode) 
        // debugPrint("City:",city) 

        completition() 
       } 
      } else { 
       // Location is NIL 
      } 
     } 
    } 
    locManager.delegate = self // and conform protocol 
    locationManager.startUpdatingLocation() 
} 

//MARK: Find countryCode & City name from longitude & latitude 

func fetchCountryAndCity(location: CLLocation, completion: @escaping (String, String) ->()) { 
    CLGeocoder().reverseGeocodeLocation(location) { placemarks, error in 
     if let error = error { 
      debugPrint(error) 
     } else if let countryCode = placemarks?.first?.isoCountryCode, 
      let city = placemarks?.first?.locality { 
      completion(countryCode, city) 
     } 
    } 
} 
} 

Answer 1

您需要在委託方法

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 
      manager.stopUpdatingLocation() // if you dont want continuously update 

      currentLocation = manager.location 
     let location = CLLocation(latitude: currentLocation.coordinate.latitude, longitude: currentLocation.coordinate.longitude) 
    fetchCountryAndCity(location: location) { countryCode, city in 
     self.intermediateCountry = countryCode 
     self.intermediateCity = city 
     // debugPrint("Country code:",countryCode) 
     // debugPrint("City:",city) 

     completition() 
    } 
    } 

檢查位置並設置委託

locManager.delegate = self // and conform protocol 
locationManager.startUpdatingLocation()