Question

我有以下Location类，我想返回当前位置。但是，我无法获得当前位置。我相信我已经添加了所有正确的PLIST项目并添加了Core Location框架。当我点按getLocation时，权限消失，我无法批准。

调试器返回以下内容：

CLLocationManager.locationServicesEnabled() true
location Services Enabled
locationManager.delegate <Shot_On_Goal.Location: 0x1c001f560>


@IBAction func getLocation(_ sender: Any) {

    let location = Location()
    location.getCurrentLocation()

}



import Foundation
import MapKit
import CoreLocation

class Location: NSObject {

    var locationManager: CLLocationManager!

    func getCurrentLocation() {

        print("class->Location->getCurrentLocation")

        locationManager = CLLocationManager()

        if (CLLocationManager.locationServicesEnabled())
        {
            print("location Services Enabled")

            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
            locationManager.requestWhenInUseAuthorization()
            locationManager.startUpdatingLocation()

        } else {

            locationManager.stopUpdatingLocation()
        }

    }

}  // class

extension Location: CLLocationManagerDelegate {

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {

        print("class->Location->didFailWithError")

        print("Error to update location \(error)")
    }

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {

        print("class->Location->didChangeAuthorization")

        switch status {
        case .notDetermined:
            print("notDetermined")
        case .restricted:
            print("restricted")
        case .denied:
            print("denied")
        case .authorizedAlways:
            print("authorizedAlways")
        case .authorizedWhenInUse:
            print("authorizedWhenInUse")
        }
    }

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

        print("class->Location->didUpdateLocations")

        let locValue:CLLocationCoordinate2D = manager.location!.coordinate
        print("locations = \(locValue.latitude) \(locValue.longitude)")
    }

} //extension

Answer 1

问题是这段代码：

let location = Location() // <-- oops
location.getCurrentLocation()

此Location实例需要是持久保留对象（例如某些持久视图控制器或app delegate的全局或实例属性）。它可以不是你所拥有的局部变量;它在它可以做任何工作之前就消失了。

Swift无法触发`didUpdateLocations`

1 个答案: