How to get Current Location with SwiftUI?

This code below works (Not production ready). Implementing the CLLocationManagerDelegate works fine and the lastKnownLocation is updated accordingly.

Don't forget to set the NSLocationWhenInUseUsageDescription in your Info.plist

class LocationManager: NSObject, ObservableObject, CLLocationManagerDelegate {
    private let manager = CLLocationManager()
    var lastKnownLocation: CLLocation?

    func startUpdating() {
        manager.delegate = self
        manager.requestWhenInUseAuthorization()
        manager.startUpdatingLocation()
    }

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

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        if status == .authorizedWhenInUse {
            manager.startUpdatingLocation()
        }
    }
}

I have written a one-file swift package with usage instructions on https://github.com/himbeles/LocationProvider. It provides a ObservableObject-type wrapper class for CLLocationManager and its delegate. There is a @Published property location which can directly be used in SwiftUI, as well as a PassthroughSubject<CLLocation, Never> called locationWillChange that you can subscribe to via Combine. Both update on every didUpdateLocations event of the CLLocationManager.

It also handles the case where location access has previously been denied: The default behavior is to present the user with a request to enable access in the app settings and a link to go there.

In SwiftUI (> iOS 14, > macOS 11), use as

import SwiftUI
import LocationProvider

struct ContentView: View {
    @StateObject var locationProvider = LocationProvider()
    
    var body: some View {
        VStack{
            Text("latitude \(locationProvider.location?.coordinate.latitude ?? 0)")
            Text("longitude \(locationProvider.location?.coordinate.longitude ?? 0)")
        }
        .onAppear {
            do {try locationProvider.start()} 
            catch {
                print("No location access.")
                locationProvider.requestAuthorization()
            }
        }
    }
}

As of Xcode 11 beta 4, you will need to change didChange to willChange:

var willChange = PassthroughSubject<LocationManager, Never>()

var lastKnownLocation: CLLocation? {
    willSet {
        willChange.send(self)
    }
}