Question

我正在学习如何使用新的Swift语言（只有Swift，没有Objective-C）。要做到这一点，我想用地图（MKMapView）做一个简单的视图。我想查找并更新用户的位置（例如在Apple Map应用程序中）。

我试过了，但没有发生任何事情：

import MapKit
import CoreLocation

class MapView : 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()
        }
    }
}

你能帮我吗？

Answer 1

当位置管理员检索当前位置时，您必须覆盖CLLocationManager.didUpdateLocations（CLLocationManagerDelegate的一部分）以获得通知：

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if let location = locations.last{
        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)
    }
}

注意：如果您的目标是iOS 8或更高版本，则必须在Info.plist中包含NSLocationAlwaysUsageDescription或NSLocationWhenInUseUsageDescription密钥才能使位置服务正常运行。

Answer 2

对于swift 3和XCode 8，我找到了这个答案：

首先，您需要将隐私设置为info.plist。将字符串 NSLocationWhenInUseUsageDescription 与您的描述一起插入您想要获取用户位置的原因。例如，设置字符串＆＃34;对于应用程序中的地图＆＃34;。

其次，请使用此代码示例

@IBOutlet weak var mapView: MKMapView!

private var locationManager: CLLocationManager!
private var currentLocation: CLLocation?

override func viewDidLoad() {
    super.viewDidLoad()

    mapView.delegate = self

    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    // Check for Location Services

    if CLLocationManager.locationServicesEnabled() {
        locationManager.requestWhenInUseAuthorization()
        locationManager.startUpdatingLocation()
    }
}

// MARK - CLLocationManagerDelegate

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    defer { currentLocation = locations.last }

    if currentLocation == nil {
        // Zoom to user location
        if let userLocation = locations.last {
            let viewRegion = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 2000, 2000)
            mapView.setRegion(viewRegion, animated: false)
        }
    }
}

第三，在mapView的故事板中设置用户位置标志。

Answer 3

100％正常工作，轻松完成步骤并经过测试

导入库：

import MapKit
import CoreLocation

设置代理：

CLLocationManagerDelegate,MKMapViewDelegate

采取变量：

let locationManager = CLLocationManager()

在viewDidLoad（）上编写此代码：

self.locationManager.requestAlwaysAuthorization()

    // For use in foreground
    self.locationManager.requestWhenInUseAuthorization()

    if CLLocationManager.locationServicesEnabled() {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.startUpdatingLocation()
    }

    mapView.delegate = self
    mapView.mapType = .standard
    mapView.isZoomEnabled = true
    mapView.isScrollEnabled = true

    if let coor = mapView.userLocation.location?.coordinate{
        mapView.setCenter(coor, animated: true)
    }

为位置编写委托方法：

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate

    mapView.mapType = MKMapType.standard

    let span = MKCoordinateSpanMake(0.05, 0.05)
    let region = MKCoordinateRegion(center: locValue, span: span)
    mapView.setRegion(region, animated: true)

    let annotation = MKPointAnnotation()
    annotation.coordinate = locValue
    annotation.title = "Javed Multani"
    annotation.subtitle = "current location"
    mapView.addAnnotation(annotation)

    //centerMap(locValue)
}

不要忘记在 info.plist

中设置权限

<key>NSLocationWhenInUseUsageDescription</key>
<string>This application requires location services to work</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>This application requires location services to work</string>

它看起来像：

Answer 4

MyLocation 是一个Swift iOS演示。

您可以将此演示用于以下内容：

显示当前位置。
选择其他位置：在这种情况下，请停止跟踪位置。
触摸时将推针添加到MKMapView（iOS）。

Answer 5

对于Swift 2，您应该将其更改为以下内容：

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

    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)
}

Answer 6

您只需要设置MKMapView的userTrackingMode。如果您只想显示和跟踪用户位置并实现与Apple Maps应用程序相同的行为，则无需编写其他代码。

mapView.userTrackingMode = .follow

在https://developer.apple.com/documentation/mapkit/mkmapview/1616208-usertrackingmode上查看更多内容。

Answer 7

您必须覆盖CLLocationManager.didUpdateLocations

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

    let userLocation:CLLocation = locations[0] as CLLocation
    locationManager.stopUpdatingLocation()

    let location = CLLocationCoordinate2D(latitude: userLocation.coordinate.latitude, longitude: userLocation.coordinate.longitude)

    let span = MKCoordinateSpanMake(0.5, 0.5)

    let region = MKCoordinateRegion (center:  location,span: span)

    mapView.setRegion(region, animated: true)
}

您还必须将NSLocationWhenInUseUsageDescription和NSLocationAlwaysUsageDescription添加到您的plist设置Result作为值

Answer 8

在Swift 4中，我使用了上面定义的locationManager委托函数。

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

..但需要将其更改为..

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

这来自...... https://github.com/lotfyahmed/MyLocation/blob/master/MyLocation/ViewController.swift - 谢谢！

Answer 9

Swift 5.1

获取当前位置并在MKMapView上设置

导入库：

import MapKit
import CoreLocation

设置代表：

CLLocationManagerDelegate , MKMapViewDelegate

声明变量：

let locationManager = CLLocationManager()

将此代码写在viewDidLoad（）上：

self.locationManager.requestAlwaysAuthorization()
self.locationManager.requestWhenInUseAuthorization()

if CLLocationManager.locationServicesEnabled() {
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.startUpdatingLocation()
}
mapView.delegate = self
mapView.mapType = .standard
mapView.isZoomEnabled = true
mapView.isScrollEnabled = true

if let coor = mapView.userLocation.location?.coordinate{
    mapView.setCenter(coor, animated: true)
}

为位置写委托方法：

func locationManager(_ manager: CLLocationManager, didUpdateLocations 
    locations: [CLLocation]) {
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate

    mapView.mapType = MKMapType.standard

    let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05)
    let region = MKCoordinateRegion(center: locValue, span: span)
    mapView.setRegion(region, animated: true)

    let annotation = MKPointAnnotation()
    annotation.coordinate = locValue
    annotation.title = "You are Here"
    mapView.addAnnotation(annotation)
}

在info.plist中设置权限*

<key>NSLocationWhenInUseUsageDescription</key>
<string>This application requires location services to work</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>This application requires location services to work</string>

Answer 10

您好有时出于某些奇怪的原因，无法在代码中设置showsUserLocation。

因此，请尝试以下组合。

在viewDidLoad（）

  self.mapView.showsUserLocation = true

转到Xcode中的情节提要，在右侧面板的属性检查器上，选中用户位置复选框，与所附图像类似，。运行您的应用，您应该可以看到用户位置

Answer 11

mapView.showsUserLocation = true

创建 UIButton 并添加这个动作

@IBAction func showCurrentLocation(_ sender: Any) {
        let coordinate = mapView.userLocation.coordinate
        let center = CLLocationCoordinate2D(latitude: coordinate.latitude, longitude: coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
        self.mapView.setRegion(region, animated: true)
    }

在Swift中的MKMapView中显示当前位置和更新位置

11 个答案: