如何使用静音推送通知按需更新用户位置?iOS

我想只根据需要跟踪用户的当前位置。我只需要初始位置，不需要持续更新。我认为最好的方法是向用户发送静音通知，以便获得用户的当前位置。接收静默通知工作得很好，但是LocationManager没有获得位置的初始修复。我的位置管理器委托类正常实例化，但在位置管理器方法startUpdatingLocation()被调用后的任何时候都不会触发didupdatlocations函数。当App从AppDelegate:didFinishLaunchingWithOptions正常启动时，LocationManager会毫无问题地更新用户位置。

我正在开发Xcode 6.3.2到iOS 8.3

我的AppDelegate:DidReceiveRemoteNotification看起来像这样:

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler handler: (UIBackgroundFetchResult) -> Void) {
    var bgTask = bgManager()
    bgTask.registerBackgroundTask()
    LocManager.locationMngr.startUpdatingLocation() // LocManager is global variable
    let delayInSeconds = 8.0
    let popTime = dispatch_time(DISPATCH_TIME_NOW, Int64(delayInSeconds * Double(NSEC_PER_SEC)))
    dispatch_after(popTime, dispatch_get_main_queue()) {
            println(LocManager.updated)
            bgTask.endBackgroundTask()
            handler(UIBackgroundFetchResult.NewData)
    }
}

我第一次只尝试了line:

LocManager.locationMngr.startUpdatingLocation()

但是当它不工作时，我添加了后台任务和dispatch_after，以确保我的位置管理器在终止前有足够的时间检索第一个位置更新。

这是LocationManager类:

class LocationManager: NSObject, CLLocationManagerDelegate {
let locationMngr:CLLocationManager
var coord:CLLocationCoordinate2D
var updated:Bool
    override init() {
        locationMngr = CLLocationManager()
        coord = CLLocationCoordinate2D()
        updated = false
        super.init()
        locationMngr.delegate = self
        locationMngr.desiredAccuracy = kCLLocationAccuracyHundredMeters
        locationMngr.startUpdatingLocation() //Should call didUpdateLocations after some time
    }
    //Doesn't get called in AppDelegate remoteNotifications method
    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!)
    {
        var loc:CLLocation = locations.first as! CLLocation
        self.coord = loc.coordinate
        locationMngr.stopUpdatingLocation()
        updated = true
    }

和后台管理器类:

class bgManager:NSObject{
    var backgroundTask: UIBackgroundTaskIdentifier = UIBackgroundTaskInvalid
    override init(){
        super.init()
    }
    func registerBackgroundTask() {
        backgroundTask = UIApplication.sharedApplication().beginBackgroundTaskWithExpirationHandler {
        [unowned self] in
        self.endBackgroundTask()
        }
    }
    func endBackgroundTask() {
        UIApplication.sharedApplication().endBackgroundTask(backgroundTask)
        backgroundTask = UIBackgroundTaskInvalid
    }
}

收到的远程推送的JSON:

"aps" : {
        "sound" : "",
        "content-available" : 1,
        "priority" : 5
    }

我有所有需要的plist.info键和后台模式获取，通知和位置在项目功能启用:后台模式。plist.info片段:

<dict>
    <key>UIRequiredDeviceCapabilities</key>
    <array>
        <string>location-services</string>
        <string></string>
        <string></string>
    </array>
    <key>UIBackgroundModes</key>
    <array>
        <string>remote-notification</string>
        <string>fetch</string>
        <string>location</string>
    </array>
    <key>NSLocationAlwaysUsageDescription</key>
    <string>Your location is needed for this app.</string>
    ...

我已经疯狂地浏览了类似的问题，找不到任何有帮助的解决方案，包括这个问题:

IOS -运行后台任务更新用户位置使用swift

iOS后台位置定时更新

Core Location delegate方法在iOS 8.3中没有被调用Xcode 6.3.1

Swift: location从后台返回时未更新