【发布时间】:2016-01-13 20:19:57
【问题描述】:
我正在开发一个简单的应用程序,其中将显示地图和一些标记。我还希望在此应用中显示用户的当前位置。 到目前为止,这是我的代码:
import UIKit
import MapKit
import CoreLocation
class HomePageViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
@IBOutlet weak var templabelforlocationtesting: UILabel!
@IBOutlet weak var map: MKMapView!
let locationManager = CLLocationManager()
@IBOutlet weak var menuButton: UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
if self.revealViewController() != nil {
menuButton.target = self.revealViewController()
menuButton.action = "revealToggle:"
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
}
// Do any additional setup after loading the view.
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestAlwaysAuthorization()
self.locationManager.startUpdatingLocation()
self.map.showsUserLocation = true
//temporary nearby locations list
//temple tooth
let templeToothMarker = MKPointAnnotation()
let templeToothLocation = CLLocationCoordinate2D(latitude: 7.294715, longitude: 80.639858)
templeToothMarker.coordinate = templeToothLocation
templeToothMarker.title = "Kandy Dalada Maligawa"
templeToothMarker.subtitle = "Historic Religious place"
//botanical gardens
let botanicalGardenMarker = MKPointAnnotation()
let botanicalGardenLocation = CLLocationCoordinate2D(latitude: 7.273346, longitude: 80.595140)
botanicalGardenMarker.coordinate = botanicalGardenLocation
botanicalGardenMarker.title = "Royal Botanical Gardens"
botanicalGardenMarker.subtitle = "Botanical Garden in Kandy"
//load markers to map
map.addAnnotations([templeToothMarker, botanicalGardenMarker])
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.last! as CLLocation
let centerLocation = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
templabelforlocationtesting.text = "Location: " + String(location.coordinate.latitude) + " , " + String(location.coordinate.longitude)
let mapSpan = MKCoordinateSpanMake(0.06, 0.06)
let mapRegion = MKCoordinateRegion(center: centerLocation, span: mapSpan)
self.map.setRegion(mapRegion, animated: true)
self.locationManager.stopUpdatingLocation()
}
}
地图正在运行并且标记正在显示,但以下问题仍然存在。
我无法让地图放大到更高的级别(到
let mapSpan = MKCoordinateSpanMake(0.06, 0.06)中设置的级别)应获取用户的当前位置并将其设置为地图的中心,并且还应显示为带有注释的当前位置。为了检查位置是否已加载,我也设置了一个标签,但这也不起作用。
我在这里做错了什么?
【问题讨论】:
-
如果你在 放置一个断点,让 location = locations.last!作为 CLLocation 你得到什么值?