Question

我需要让用户动态获取当前位置。

为此，我正在使用CLLocationManager获取当前位置，这很好。

现在我想使用WIFI，GPS，定位服务或设备中的任何其他应用程序获取当前位置（即应用程序已经保持当前位置值）。

在上述所有可能的方式中，保持电池使用量减少以获得当前位置？

在iOS中怎么可能？

Answer 1

将此代码放入Appdelegate

func initLocationManager() {
    seenError = false
    locationFixAchieved = false
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    locationManager.requestAlwaysAuthorization()

}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if (locationFixAchieved == false) {
        locationFixAchieved = true
        let locationArray = locations as NSArray
        let locationObj = locationArray.lastObject as! CLLocation
        let coord = locationObj.coordinate
        NSUserDefaults.standardUserDefaults().setValue(String(coord.latitude), forKey: "latitude")
        NSUserDefaults.standardUserDefaults().setValue(String(coord.longitude), forKey: "longitude")

        locationManager.stopUpdatingLocation()
    }
    CLGeocoder().reverseGeocodeLocation(manager.location!, 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] as CLPlacemark
            self.displayLocationInfo(pm)
        } else {
            print("Problem with the data received from geocoder")
        }
    })
}


func displayLocationInfo(placemark: CLPlacemark) {
        //stop updating location to save battery life
        locationManager.stopUpdatingLocation()
        print(placemark.locality )
        print(placemark.postalCode )
        print(placemark.administrativeArea )
        print(placemark.country )
        NSUserDefaults.standardUserDefaults().setValue(placemark.locality, forKey: "city")
        NSUserDefaults.standardUserDefaults().setValue(placemark.administrativeArea, forKey: "state")


}


// authorization status
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    var shouldIAllow = false

    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) {
        print("Location to Allowed")
        // Start location services
        locationManager.startUpdatingLocation()
    } else {
        print("Denied access: \(locationStatus)")
    }
}

现在在 didFinishLaunchingWithOptions

中调用 initLocationManager（）类

如何在iOS中的所有WIFI，GPS，定位服务或任何其他应用中获取当前位置？

1 个答案: