我是iOS的新手,我需要使用Swift在MKMapView中实现一个可拖拽的MKPointAnnotation。请提供一个示例。我已经在地图上实现了MKMapView,并添加了一个MKPointAnnotation(addAnnotation)。
我的英语不好,请帮帮我!
我找到了这个链接,但是我没有理解:link。
我的英语不好,请帮帮我!
我找到了这个链接,但是我没有理解:link。
let annotation = MKPointAnnotation()
annotation.setCoordinate(location) // your location here
annotation.title = "My Title"
annotation.subtitle = "My Subtitle"
self.mapView.addAnnotation(annotation)
创建注释视图
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
if annotation is MKPointAnnotation {
let pinAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myPin")
pinAnnotationView.pinColor = .Purple
pinAnnotationView.draggable = true
pinAnnotationView.canShowCallout = true
pinAnnotationView.animatesDrop = true
return pinAnnotationView
}
return nil
}
以下是我的示例代码。此代码允许您长按地图以添加一个点,并拖动该点直到您从屏幕上释放手指。还请注意要在地图视图上添加的gestureRecognizer手势识别器。希望这能帮助您。
class TravelLocationMapController: UIViewController, MKMapViewDelegate {
@IBOutlet var mapView: MKMapView!
var dragPin: MKPointAnnotation!
override func viewDidLoad() {
super.viewDidLoad()
mapView.delegate = self
let gestureRecognizer = UILongPressGestureRecognizer(target: self, action: "addPin:")
gestureRecognizer.numberOfTouchesRequired = 1
mapView.addGestureRecognizer(gestureRecognizer)
}
func addPin(gestureRecognizer:UIGestureRecognizer){
let touchPoint = gestureRecognizer.locationInView(mapView)
let newCoordinates = mapView.convertPoint(touchPoint, toCoordinateFromView: mapView)
if dragPin != nil {
dragPin.coordinate = newCoordinates
}
if gestureRecognizer.state == UIGestureRecognizerState.Began {
dragPin = MKPointAnnotation()
dragPin.coordinate = newCoordinates
mapView.addAnnotation(dragPin)
} else if gestureRecognizer.state == UIGestureRecognizerState.Ended {
dragPin = nil
}
}
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKPointAnnotation {
let pinAnnotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myPin")
pinAnnotationView.pinTintColor = UIColor.purpleColor()
pinAnnotationView.animatesDrop = true
return pinAnnotationView
}
return nil
}
func mapView(mapView: MKMapView, didSelectAnnotationView view: MKAnnotationView) {
let lat = view.annotation?.coordinate.latitude
let long = view.annotation?.coordinate.longitude
print("Clic pin lat \(lat) long \(long)")
}