SWIFT 版本
我创建了一个帮助类 HelperLocationManager，并添加了一个 notification-observer 设计模式。
import UIKit
import CoreLocation
class HelperLocationManager: NSObject {
var locationManager = CLLocationManager()
static let sharedInstance = HelperLocationManager()
var currentLocation :CLLocation?
var notGotUserLocation = true
override init() {
super.init()
var code = CLLocationManager.authorizationStatus()
if code == CLAuthorizationStatus.NotDetermined {
locationManager.requestAlwaysAuthorization()
locationManager.requestWhenInUseAuthorization()
}
locationManager.requestAlwaysAuthorization()
locationManager.requestWhenInUseAuthorization()
locationManager.delegate = self
locationManager.distanceFilter = 100;
}
}
extension HelperLocationManager: CLLocationManagerDelegate{
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
var locValue = locations.last as! CLLocation
println(locValue)
self.currentLocation = locValue
NSNotificationCenter.defaultCenter().postNotificationName("sendCurrentAddressToViewController", object:self.currentLocation)
notGotUserLocation = false
}
func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
println("Your error is ", error.localizedDescription)
}
}
现在，如果您的
Viewcontroller类需要位置信息，则可以在那里放置一个观察者。
var helperLocation:HelperLocationManager?
在
viewDidLoad方法中
override func viewDidLoad() {
helperLocation = HelperLocationManager()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "getCurrentAddressToViewController:", name: "sendCurrentAddressToViewController", object: nil)
}
//并观察者为
func getCurrentAddressToViewController(notification: NSNotification) {
currentLocation = notification.object as? CLLocation
NSNotificationCenter.defaultCenter().removeObserver(self, name: "sendCurrentAddressToViewController", object: nil)
}
//虽然didUpdateLocation被多次调用，但由于在获取位置后移除了observer，因此只会获得一次位置。
编辑：我重新设计了这个辅助类，所以您不需要添加通知观察者模式。
class HelperLocationManager: NSObject {
private lazy var locationManager = CLLocationManager()
static let sharedInstance = HelperLocationManager()
var currentLocation :CLLocation?
override init() {
super.init()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
}
}
extension HelperLocationManager: CLLocationManagerDelegate{
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
switch status {
case CLAuthorizationStatus.NotDetermined:
locationManager.requestWhenInUseAuthorization()
case CLAuthorizationStatus.Restricted:
PrinterHelper.messagePrinter("Restricted Access to location")
case CLAuthorizationStatus.Denied:
PrinterHelper.messagePrinter("User denied access to location")
case CLAuthorizationStatus.AuthorizedWhenInUse:
if #available(iOS 9.0, *) {
locationManager.requestLocation()
} else {
locationManager.startUpdatingLocation()
}
default:
PrinterHelper.messagePrinter("default authorization")
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let locValue = locations.last
HelperLocationManager.sharedInstance.currentLocation = locValue
locationManager.stopUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
PrinterHelper.errorPrinter(error.localizedDescription)
}
}
需要获取用户权限的视图控制器
var helperLocationManager:HelperLocationManager?
在
viewDidLoad中作为...
override func viewDidLoad() {
helperLocationManager = HelperLocationManager.sharedInstance
}
要获取位置，您需要调用单例属性currentLocation。
if let userCurentLoc = HelperLocationManager.sharedInstance.currentLocation{
//userCurrentLoc is the user Location
}
