获取用户的当前位置/坐标 [英] Get User's Current Location / Coordinates

问题描述

如何存储用户的当前位置并在地图上显示位置？

How can I store the user's current location and also show the location on a map?

我可以在地图上显示预定义的坐标，我只是不知道如何从设备接收信息。

I am able to show pre-defined coordinates on a map, I just don't know how to receive information from the device.

另外我知道我必须在Plist中添加一些项目。我该怎么做？

Also I know I have to add some items into a Plist. How can I do that?

推荐答案

要获取用户的当前位置，您需要声明：

To get a user's current location you need to declare:

let locationManager = CLLocationManager()

在 viewDidLoad（）中，您必须实例化 CLLocationManager 类，如下所示：

In viewDidLoad() you have to instanitate the CLLocationManager class, like this:

// 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，您可以获得用户的当前位置坐标：

Then in CLLocationManagerDelegate method you can get user's current location coordinates:

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，你将必须添加 NSLocationAlwaysUsageDescription
和您的自定义警报消息，如AppName（Demo Ap） p）想要使用您当前的位置。

In the info.plist you will have to add NSLocationAlwaysUsageDescription and your custom alert message like, AppName(Demo App) would like to use your current location.

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