如何解决Swift - 如何在用户单击按钮时显示 Mapkit 注释
我是 Xcode Swift Storyboard 的新手,我试图在用户单击按钮时在 mapkit 中显示地图注释。现在使用当前代码,注释(图钉)从一开始就显示出来,我想嵌入按钮中,以便在用户按下按钮后显示在地图中。这是与注释相关的代码片段:
let pin = MKPointAnnotation()
pin.coordinate = coordinate
mapView.addAnnotation(pin)
}
完整代码如下:
import CoreLocation
import MapKit
import UIKit
class ViewController: UIViewController,CLLocationManagerDelegate {
@IBOutlet var mapView: MKMapView!
let manager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.delegate = self
manager.requestWhenInUseAuthorization()
manager.startUpdatingLocation()
}
func locationManager( _ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]){
if let location = locations.first{
manager.stopUpdatingLocation()
render(location: location)
}
}
func render(location: CLLocation){
let coordinate = CLLocationCoordinate2D(latitude: location.coordinate.latitude,longitude: location.coordinate.longitude)
let span = MKCoordinateSpan(latitudeDelta: 0.1,longitudeDelta: 0.1)
let region = MKCoordinateRegion(center: coordinate,span: span)
mapView.setRegion(region,animated: true)
let pin = MKPointAnnotation()
pin.coordinate = coordinate
mapView.addAnnotation(pin)
}
}
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