【发布时间】：2022-01-18 16:01:20
【问题描述】：
如何存储用户的当前位置并在地图上显示该位置？
我可以在地图上显示预定义的坐标，只是不知道如何从设备接收信息。
我也知道我必须将一些项目添加到 Plist 中。我该怎么做？
【问题讨论】：
标签： ios swift iphone location cllocationmanager
【发布时间】：2022-01-18 16:01:20
【问题描述】：
要获取用户的当前位置，您需要声明：
let locationManager = CLLocationManager()
在viewDidLoad() 中，您必须实例化CLLocationManager 类，如下所示：
// Ask for Authorisation from the User.
self.locationManager.requestAlwaysAuthorization()
// For use in foreground
self.locationManager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.startUpdatingLocation()
}
然后在 CLLocationManagerDelegate 方法中可以获取用户当前的位置坐标：
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else { return }
print("locations = \(locValue.latitude) \(locValue.longitude)")
}
在 info.plist 中，您必须添加 NSLocationAlwaysUsageDescription
以及您的自定义警报消息，例如； AppName(Demo App) 想使用您当前的位置。
【讨论】：
-
别忘了
Import MapKit+CoreLocation+ 在类定义中添加CLLocationManagerDelegate。 -
@Yusha 如果这对您来说像 Objective-C，那么您从未见过 Objective-C（也没有 Swift）
-
你忘了说 CLLocationManagerDelegate 协议的实现。
-
NSLocationAlwaysUsageDescription已重命名为Privacy - Location Always Usage Description -
您必须将
locationManager声明为全局变量，而不是viewDidLoad中的局部变量
您应该执行以下步骤：
- 将
CoreLocation.framework添加到 BuildPhases -> 将二进制文件与库链接（从 XCode 7.2.1 开始不再需要） - 将
CoreLocation导入您的班级 - 很可能是 ViewController.swift - 在你的类声明中添加
CLLocationManagerDelegate - 将
NSLocationWhenInUseUsageDescription和NSLocationAlwaysUsageDescription添加到plist -
初始化位置管理器：
locationManager = CLLocationManager() locationManager.delegate = self; locationManager.desiredAccuracy = kCLLocationAccuracyBest locationManager.requestAlwaysAuthorization() locationManager.startUpdatingLocation() -
通过以下方式获取用户位置：
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { let locValue:CLLocationCoordinate2D = manager.location!.coordinate print("locations = \(locValue.latitude) \(locValue.longitude)") }
【讨论】：
-
新功能：func locationManager（经理：CLLocationManager，didUpdateLocations 位置：[CLLocation]）
-
一步一步的回答。但请更新它。它现在不工作。
iOS 12.2 更新与 Swift 5
您必须在 plist 文件中添加以下隐私权限
<key>NSLocationWhenInUseUsageDescription</key>
<string>Description</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>Description</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>Description</string>
我是这样的
在 Swift 2.0 中获取当前位置并在地图上显示
确保您已将 CoreLocation 和 MapKit 框架添加到您的项目中（XCode 7.2.1 不需要这样做） p>
import Foundation
import CoreLocation
import MapKit
class DiscoverViewController : UIViewController, CLLocationManagerDelegate {
@IBOutlet weak var map: MKMapView!
var locationManager: CLLocationManager!
override func viewDidLoad()
{
super.viewDidLoad()
if (CLLocationManager.locationServicesEnabled())
{
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let location = locations.last! as CLLocation
let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
self.map.setRegion(region, animated: true)
}
}
这是结果屏幕
【讨论】：
-
我运行你的代码，我得到一个空白的白屏。是否有视图或需要添加到情节提要的内容？
-
在 Swift 4 中非常适合我，只需添加一个下划线（由 Xcode 提示），因此 locationManager 行变为：func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
导入库如：
import CoreLocation
设置委托：
CLLocationManagerDelegate
取变量如：
var locationManager:CLLocationManager!
在 viewDidLoad() 上写下这段漂亮的代码：
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled(){
locationManager.startUpdatingLocation()
}
编写 CLLocation 委托方法：
//MARK: - location delegate methods
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation :CLLocation = locations[0] as CLLocation
print("user latitude = \(userLocation.coordinate.latitude)")
print("user longitude = \(userLocation.coordinate.longitude)")
self.labelLat.text = "\(userLocation.coordinate.latitude)"
self.labelLongi.text = "\(userLocation.coordinate.longitude)"
let geocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(userLocation) { (placemarks, error) in
if (error != nil){
print("error in reverseGeocode")
}
let placemark = placemarks! as [CLPlacemark]
if placemark.count>0{
let placemark = placemarks![0]
print(placemark.locality!)
print(placemark.administrativeArea!)
print(placemark.country!)
self.labelAdd.text = "\(placemark.locality!), \(placemark.administrativeArea!), \(placemark.country!)"
}
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Error \(error)")
}
现在设置访问该位置的权限，因此将这些键值添加到您的 info.plist 文件中
<key>NSLocationAlwaysUsageDescription</key>
<string>Will you allow this app to always know your location?</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>Do you allow this app to know your current location?</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>Do you allow this app to know your current location?</string>
100% 工作没有任何问题。已测试
【讨论】：
-
我有另一种语言，但它不起作用。我只想要英语。
NSLocationWhenInUseUsageDescription = 在应用程序处于后台时请求使用位置服务的权限。在您的 plist 文件中。
如果可行，请为答案投票。
【讨论】：
-
你可以通过添加代码来解释你的答案。如果你愿意
-
使用标记语言而不是粘贴屏幕截图来获得代码的 sn-p 会很好
首先导入Corelocation和MapKit库：
import MapKit
import CoreLocation
从 CLLocationManagerDelegate 继承到我们的类
class ViewController: UIViewController, CLLocationManagerDelegate
创建一个 locationManager 变量，这将是您的位置数据
var locationManager = CLLocationManager()
创建一个函数来获取位置信息，具体来说这个确切的语法有效：
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
在你的函数中为用户当前位置创建一个常量
let userLocation:CLLocation = locations[0] as CLLocation // note that locations is same as the one in the function declaration
停止更新位置，这可以防止您的设备在移动时不断更改窗口以使您的位置居中（如果您希望它以其他方式运行，您可以省略它）
manager.stopUpdatingLocation()
从刚刚定义的 userLocatin 中获取用户坐标：
let coordinations = CLLocationCoordinate2D(latitude: userLocation.coordinate.latitude,longitude: userLocation.coordinate.longitude)
定义您希望地图的缩放程度：
let span = MKCoordinateSpanMake(0.2,0.2)
将这两者结合起来得到区域：
let region = MKCoordinateRegion(center: coordinations, span: span)//this basically tells your map where to look and where from what distance
现在设置区域并选择是否要带动画去那里
mapView.setRegion(region, animated: true)
关闭你的函数
}
通过您的按钮或您希望将 locationManagerDeleget 设置为 self 的其他方式
现在允许显示位置
指定准确度
locationManager.desiredAccuracy = kCLLocationAccuracyBest
授权：
locationManager.requestWhenInUseAuthorization()
为了能够授权定位服务，您需要将这两行添加到您的 plist 中
获取位置：
locationManager.startUpdatingLocation()
向用户展示：
mapView.showsUserLocation = true
这是我的完整代码：
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
@IBOutlet weak var mapView: MKMapView!
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func locateMe(sender: UIBarButtonItem) {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
mapView.showsUserLocation = true
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation:CLLocation = locations[0] as CLLocation
manager.stopUpdatingLocation()
let coordinations = CLLocationCoordinate2D(latitude: userLocation.coordinate.latitude,longitude: userLocation.coordinate.longitude)
let span = MKCoordinateSpanMake(0.2,0.2)
let region = MKCoordinateRegion(center: coordinations, span: span)
mapView.setRegion(region, animated: true)
}
}
【讨论】：
Swift 3.0
如果您不想在地图中显示用户位置，而只想将其存储在 firebase 或其他地方，请按照以下步骤操作，
import MapKit
import CoreLocation
现在在您的 VC 上使用 CLLocationManagerDelegate，您必须覆盖下面显示的最后三个方法。您可以看到 requestLocation() 方法如何使用这些方法为您获取当前用户位置。
class MyVc: UIViewController, CLLocationManagerDelegate {
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
isAuthorizedtoGetUserLocation()
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
}
}
//if we have no permission to access user location, then ask user for permission.
func isAuthorizedtoGetUserLocation() {
if CLLocationManager.authorizationStatus() != .authorizedWhenInUse {
locationManager.requestWhenInUseAuthorization()
}
}
//this method will be called each time when a user change his location access preference.
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if status == .authorizedWhenInUse {
print("User allowed us to access location")
//do whatever init activities here.
}
}
//this method is called by the framework on locationManager.requestLocation();
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Did location updates is called")
//store the user location here to firebase or somewhere
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("Did location updates is called but failed getting location \(error)")
}
}
现在，一旦用户登录您的应用，您就可以编写以下调用代码。当 requestLocation() 被调用时，它将进一步调用上面的 didUpdateLocations，你可以将位置存储到 Firebase 或其他任何地方。
if CLLocationManager.locationServicesEnabled() {
locationManager.requestLocation();
}
如果您使用的是 GeoFire，那么在上面的 didUpdateLocations 方法中，您可以将位置存储如下
geoFire?.setLocation(locations.first, forKey: uid) where uid is the user id who logged in to the app. I think you will know how to get UID based on your app sign in implementation.
最后但并非最不重要的一点是，转到您的 Info.plist 并启用“Privacy -Location when in Use Usage Description”。
当您使用模拟器进行测试时，它始终会为您提供一个您在模拟器 -> 调试 -> 位置中配置的自定义位置。
【讨论】：
-
您好，位置在哪里（经度、纬度），多久重新加载一次位置？
-
@CristianMora 当 locationManager.requestLocation 被调用时，这被调用 locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 其中这是一个 Locations 数组，您可以使用其中一个或显示用户来挑选最合适的。位置是 CLLocation 类型，您可以从此对象获取经度、纬度。如果您只需要一次用户信息，那么您不需要重新加载位置，否则您可以根据需要调用 requestLocation()。以搜索请求为例，您首先调用 requestLocation()，然后根据位置给出答案。
首先在你的项目中添加两个框架
1：MapKit
2：核心定位（从 XCode 7.2.1 开始不再需要）
在你的类中定义
var manager:CLLocationManager!
var myLocations: [CLLocation] = []
然后在 viewDidLoad 方法中代码 this
manager = CLLocationManager()
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestAlwaysAuthorization()
manager.startUpdatingLocation()
//Setup our Map View
mapobj.showsUserLocation = true
不要忘记在 plist 文件中添加这两个值
1: NSLocationWhenInUseUsageDescription
2: NSLocationAlwaysUsageDescription
【讨论】：
用法：
在类中定义字段
let getLocation = GetLocation()
通过简单的代码在类函数中使用：
getLocation.run {
if let location = $0 {
print("location = \(location.coordinate.latitude) \(location.coordinate.longitude)")
} else {
print("Get Location failed \(getLocation.didFailWithError)")
}
}
类：
import CoreLocation
public class GetLocation: NSObject, CLLocationManagerDelegate {
let manager = CLLocationManager()
var locationCallback: ((CLLocation?) -> Void)!
var locationServicesEnabled = false
var didFailWithError: Error?
public func run(callback: @escaping (CLLocation?) -> Void) {
locationCallback = callback
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBestForNavigation
manager.requestWhenInUseAuthorization()
locationServicesEnabled = CLLocationManager.locationServicesEnabled()
if locationServicesEnabled { manager.startUpdatingLocation() }
else { locationCallback(nil) }
}
public func locationManager(_ manager: CLLocationManager,
didUpdateLocations locations: [CLLocation]) {
locationCallback(locations.last!)
manager.stopUpdatingLocation()
}
public func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
didFailWithError = error
locationCallback(nil)
manager.stopUpdatingLocation()
}
deinit {
manager.stopUpdatingLocation()
}
}
不要忘记在 info.plist 中添加“NSLocationWhenInUseUsageDescription”。
【讨论】：
-
谢谢！不要忘记在 info.plist 中添加“NSLocationWhenInUseUsageDescription”
import CoreLocation
import UIKit
class ViewController: UIViewController, CLLocationManagerDelegate {
var locationManager: CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if status != .authorizedWhenInUse {return}
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
let locValue: CLLocationCoordinate2D = manager.location!.coordinate
print("locations = \(locValue.latitude) \(locValue.longitude)")
}
}
因为requestWhenInUseAuthorization的调用是异步的，所以在用户授权或拒绝后，应用程序会调用locationManager函数。因此，在用户授予权限的情况下，将您的位置获取代码放在该函数中是正确的。 This is the best tutorial on this I have found on it.
【讨论】：
override func viewDidLoad() {
super.viewDidLoad()
locationManager.requestWhenInUseAuthorization();
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.startUpdatingLocation()
}
else{
print("Location service disabled");
}
}
这是您的视图确实加载方法，并且在 ViewController 类中还包括 mapStart 更新方法，如下所示
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
var locValue : CLLocationCoordinate2D = manager.location.coordinate;
let span2 = MKCoordinateSpanMake(1, 1)
let long = locValue.longitude;
let lat = locValue.latitude;
print(long);
print(lat);
let loadlocation = CLLocationCoordinate2D(
latitude: lat, longitude: long
)
mapView.centerCoordinate = loadlocation;
locationManager.stopUpdatingLocation();
}
另外不要忘记在您的项目中添加 CoreLocation.FrameWork 和 MapKit.Framework（从 XCode 7.2.1 开始不再需要）
【讨论】：
import Foundation
import CoreLocation
enum Result<T> {
case success(T)
case failure(Error)
}
final class LocationService: NSObject {
private let manager: CLLocationManager
init(manager: CLLocationManager = .init()) {
self.manager = manager
super.init()
manager.delegate = self
}
var newLocation: ((Result<CLLocation>) -> Void)?
var didChangeStatus: ((Bool) -> Void)?
var status: CLAuthorizationStatus {
return CLLocationManager.authorizationStatus()
}
func requestLocationAuthorization() {
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled() {
manager.startUpdatingLocation()
//locationManager.startUpdatingHeading()
}
}
func getLocation() {
manager.requestLocation()
}
deinit {
manager.stopUpdatingLocation()
}
}
extension LocationService: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
newLocation?(.failure(error))
manager.stopUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.sorted(by: {$0.timestamp > $1.timestamp}).first {
newLocation?(.success(location))
}
manager.stopUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .notDetermined, .restricted, .denied:
didChangeStatus?(false)
default:
didChangeStatus?(true)
}
}
}
需要在需要的 ViewController 中编写此代码。
//NOTE:: Add permission in info.plist::: NSLocationWhenInUseUsageDescription
let locationService = LocationService()
@IBAction func action_AllowButtonTapped(_ sender: Any) {
didTapAllow()
}
func didTapAllow() {
locationService.requestLocationAuthorization()
}
func getCurrentLocationCoordinates(){
locationService.newLocation = {result in
switch result {
case .success(let location):
print(location.coordinate.latitude, location.coordinate.longitude)
case .failure(let error):
assertionFailure("Error getting the users location \(error)")
}
}
}
func getCurrentLocationCoordinates() {
locationService.newLocation = { result in
switch result {
case .success(let location):
print(location.coordinate.latitude, location.coordinate.longitude)
CLGeocoder().reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in
if error != nil {
print("Reverse geocoder failed with error" + (error?.localizedDescription)!)
return
}
if (placemarks?.count)! > 0 {
print("placemarks", placemarks!)
let pmark = placemarks?[0]
self.displayLocationInfo(pmark)
} else {
print("Problem with the data received from geocoder")
}
})
case .failure(let error):
assertionFailure("Error getting the users location \(error)")
}
}
}
【讨论】：
-
它的好方法
这是一个对我有用的复制粘贴示例。
http://swiftdeveloperblog.com/code-examples/determine-users-current-location-example-in-swift/
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
var locationManager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
determineMyCurrentLocation()
}
func determineMyCurrentLocation() {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.startUpdatingLocation()
//locationManager.startUpdatingHeading()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation:CLLocation = locations[0] as CLLocation
// Call stopUpdatingLocation() to stop listening for location updates,
// other wise this function will be called every time when user location changes.
// manager.stopUpdatingLocation()
print("user latitude = \(userLocation.coordinate.latitude)")
print("user longitude = \(userLocation.coordinate.longitude)")
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error)
{
print("Error \(error)")
}
}
【讨论】：
// its with strongboard
@IBOutlet weak var mapView: MKMapView!
//12.9767415,77.6903967 - exact location latitude n longitude location
let cooridinate = CLLocationCoordinate2D(latitude: 12.9767415 , longitude: 77.6903967)
let spanDegree = MKCoordinateSpan(latitudeDelta: 0.2,longitudeDelta: 0.2)
let region = MKCoordinateRegion(center: cooridinate , span: spanDegree)
mapView.setRegion(region, animated: true)
【讨论】：
100% 在 iOS Swift 4 中工作，作者：Parmar Sajjad
第 1 步：转到 GoogleDeveloper Api 控制台并创建您的 ApiKey
第 2 步：转到项目安装 Cocoapods GoogleMaps pod
第 3 步：转到 AppDelegate.swift 导入 GoogleMaps 和
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
GMSServices.provideAPIKey("ApiKey")
return true
}
第 4 步： 导入 UIKit 导入谷歌地图 类 ViewController: UIViewController, CLLocationManagerDelegate {
@IBOutlet weak var mapview: UIView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
locationManagerSetting()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func locationManagerSetting() {
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
self.showCurrentLocationonMap()
self.locationManager.stopUpdatingLocation()
}
func showCurrentLocationonMap() {
let
cameraposition = GMSCameraPosition.camera(withLatitude: (self.locationManager.location?.coordinate.latitude)! , longitude: (self.locationManager.location?.coordinate.longitude)!, zoom: 18)
let mapviewposition = GMSMapView.map(withFrame: CGRect(x: 0, y: 0, width: self.mapview.frame.size.width, height: self.mapview.frame.size.height), camera: cameraposition)
mapviewposition.settings.myLocationButton = true
mapviewposition.isMyLocationEnabled = true
let marker = GMSMarker()
marker.position = cameraposition.target
marker.snippet = "Macczeb Technologies"
marker.appearAnimation = GMSMarkerAnimation.pop
marker.map = mapviewposition
self.mapview.addSubview(mapviewposition)
}
}
第 5 步：打开 info.plist 文件并在 Privacy - Location When In Use Usage Description ......下方添加 Main storyboard 文件基本名称
第 6 步：运行
【讨论】：