How to get Current Location with SwiftUI?

问题

Trying to get current location with using swiftUI. Below code, couldn't initialize with didUpdateLocations delegate.

class GetLocation : BindableObject {
    var didChange = PassthroughSubject<GetLocation,Never>()

    var location : CLLocation {
        didSet {
            didChange.send(self)
        }
    }
    init() {}
}

回答1:

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, CLLocationManagerDelegate, BindableObject {
    private let manager: CLLocationManager
    var didChange = PassthroughSubject<LocationManager, Never>()

    var lastKnownLocation: CLLocation? {
        didSet {
            didChange.send(self)
        }
    }

    init(manager: CLLocationManager = CLLocationManager()) {
        self.manager = manager
        super.init()
    }

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

回答2:

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)
    }
}

来源：https://stackoverflow.com/questions/56533059/how-to-get-current-location-with-swiftui

标签

cllocation

swiftui