我正在尝试为位置实现后台提取，它在iOS模拟器内部工作得很完美，但是当我在手机上构建它时，它似乎不起作用。这是我目前的代码：
import UIKit
import CoreLocation
class CurrentConditonsViewController: UIViewController, CLLocationManagerDelegate {
lazy var locationManager: CLLocationManager! = {
let manager = CLLocationManager()
manager.desiredAccuracy = kCLLocationAccuracyHundredMeters
manager.delegate = self
manager.requestAlwaysAuthorization()
manager.distanceFilter = 2000
if #available(iOS 9.0, *) {
manager.allowsBackgroundLocationUpdates = true
} else {
// Fallback on earlier versions
};
return manager
}()
var seenError : Bool = false
var locationFixAchieved : Bool = false
var locationStatus : NSString = "Not Started"
var userLocation : String!
var userLatitude : Double!
var userLongitude : Double!
var userTemperatureCelsius : Bool!
override func viewDidLoad() {
locationManager.startUpdatingLocation();
refresh()
}
func refresh(){
initLocationManager()
}
func initLocationManager() {
seenError = false
locationFixAchieved = false
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func displayLocationInfo(placemark: CLPlacemark?) {
if let containsPlacemark = placemark {
//stop updating location to save battery life
locationManager.stopUpdatingLocation()
let locality = (containsPlacemark.locality != nil) ? containsPlacemark.locality : ""
let administrativeArea = (containsPlacemark.administrativeArea != nil) ? containsPlacemark.administrativeArea : ""
//println(locality)
//println(postalCode)
//println(administrativeArea)
//println(country)
}
}
// MARK: - CLLocationManagerDelegate
func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
// Add another annotation to the map.
let coords = newLocation.coordinate
userLatitude = coords.latitude
userLongitude = coords.longitude
if UIApplication.sharedApplication().applicationState == .Active {
NSLog("App is in foreground. New location is %@", newLocation)
CLGeocoder().reverseGeocodeLocation(newLocation, completionHandler: {(placemarks, error) -> Void in
if error != nil {
print("Reverse geocoder failed with error" + error!.localizedDescription)
return
}
if placemarks!.count > 0 {
let pm = placemarks![0]
self.displayLocationInfo(pm);
} else {
print("Problem with the data received from geocoder")
}
})
} else {
NSLog("App is backgrounded. New location is %@", newLocation)
let coord = newLocation.coordinate
let lat = coord.latitude.description;
let lng = coord.longitude.description;
let localNotification:UILocalNotification = UILocalNotification()
localNotification.alertAction = "Project RainMan"
localNotification.alertBody = "Location Updated: " + lat + ", " + lng
localNotification.fireDate = NSDate(timeIntervalSinceNow: 8)
UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
}
}
func locationManager(manager: CLLocationManager,
didChangeAuthorizationStatus status: CLAuthorizationStatus) {
var shouldIAllow = false
var locationStatus = ""
switch status {
case CLAuthorizationStatus.Restricted:
locationStatus = "Restricted Access to location"
case CLAuthorizationStatus.Denied:
locationStatus = "User denied access to location"
case CLAuthorizationStatus.NotDetermined:
locationStatus = "Status not determined"
default:
locationStatus = "Allowed to location Access"
shouldIAllow = true
}
NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
if (shouldIAllow == true) {
NSLog("Location to Allowed")
// Start location services
if #available(iOS 9.0, *) {
locationManager.allowsBackgroundLocationUpdates = true
} else {
// Fallback on earlier versions
};
locationManager.startUpdatingLocation()
} else {
NSLog("Denied access: \(locationStatus)")
}
}
} // END OF CLASS
我的实际设备上没有收到任何通知，值得注意的是，今天早上代码只会在应用运行时更新应用。我已经花了几天时间来研究这段代码，并确信它很简单，任何帮助都会非常感谢！