我已经成功制作了一个应用程序,显示用户当前所在的蓝点。然而,截至目前,当用户移动时,屏幕的中心不跟随蓝点,因此如果用户移动蓝点,则只是退出屏幕并且用户必须滚动以跟上它。那不是用户友好的!我有以下代码:
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
@IBOutlet weak var map: MKMapView!
let locationManager = CLLocationManager()
var mapp = MKMapView.self
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
if (CLLocationManager.locationServicesEnabled())
{
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
self.map.showsUserLocation = true
}
else
{
print("Location services are not enabled")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let location = locations.last
let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.002, longitudeDelta: 0.002))
self.map.setRegion(region, animated: true)
self.locationManager.stopUpdatingLocation()
}
}
我唯一的想法是我可以摆脱“stopUpdatingLocation()部分,然后它会不断更新每个新位置的新中心区域,但是我不确定是否没有使用stopUpdatingLocation是不好的做法感谢您的所有建议!
答案 0 :(得分:1)
使用userTrackningMode会导致地图视图将地图置于该位置的中心,并开始跟踪用户的位置。如果地图缩小,地图视图会自动放大用户的位置,有效地更改当前可见区域。
使用它
mapView.setUserTrackingMode(.follow, animated:true)