iOS background mode location update - manager doesn't update in background mode

问题

I just followed http://www.raywenderlich.com/92428/background-modes-ios-swift-tutorial location update part.

But manager doesn't print location info in background mode.

Then manager print logs to Xcode's console when app enter foreground.

Is this code right?

import UIKit
import CoreLocation

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {

var window: UIWindow?
var manager = CLLocationManager()


func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.delegate = self
    manager.requestAlwaysAuthorization()
    manager.startUpdatingLocation()

    return true
}

func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
    if UIApplication.sharedApplication().applicationState != .Active {
        NSLog("App is backgrounded. New location is %@", newLocation)
    }
}
.....

}

回答1:

I got answer for myself.

If your app running on iOS 9.0 or above and want to run your location service app on background,

you have to allowsBackgroundLocationUpdates variable set to true.

so here is my code.

import UIKit
import CoreLocation

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {

var window: UIWindow?
var manager = CLLocationManager()


func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.delegate = self
    manager.requestAlwaysAuthorization()
    manager.startUpdatingLocation()
    if #available(iOS 9.0, *){
        manager.allowsBackgroundLocationUpdates = true
    }   

    return true
}

func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
    if UIApplication.sharedApplication().applicationState != .Active {
        NSLog("App is backgrounded. New location is %@", newLocation)
    }
}
.....

}

来源：https://stackoverflow.com/questions/33385652/ios-background-mode-location-update-manager-doesnt-update-in-background-mode

标签

ios

swift2