我正在尝试向我在MAPKIT的注释中添加标注,但是在网上搜索时,我无法使其正常工作。
这是我当前正在创建目前正常工作的每个注释的方式。
struct loc {
let title: String
let latitude: Double
let longitude: Double
let phone: Int
//let subTitle: String
}
var locs = [
loc(title: "New York, NY", latitude: 40.713054, longitude: -74.007228, phone: 2334), //subTitle: "Sub title"),
]
func placeAnnotations() {
let annotations = locs.map { location -> MKAnnotation in
let annotation = MKPointAnnotation()
annotation.title = location.title
annotation.coordinate = CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude)
//annotation.subtitle = location.subTitle
return annotation
}
mapView.addAnnotations(annotations)
}
(我有一个函数,将数据添加到数组LOC)
这是我尝试添加不起作用的标注时所拥有的。
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation { return nil }
let identifier = "pin"
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier) as? MKPinAnnotationView
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView?.canShowCallout = true
annotationView?.rightCalloutAccessoryView = UIButton(type: .infoDark)
} else {
annotationView?.annotation = annotation
}
return annotationView
}
您使用:
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView!
肯定不会被称为。在Swift 3中,正确的签名是:
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView?