我正在尝试在 mapkit 上显示图像注释而不是引脚注释。我正在使用这段代码:
import UIKit
import MapKit
class ViewController2: UIViewController , MKMapViewDelegate {
@IBOutlet var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
mapView.delegate = self
let coordinate = CLLocationCoordinate2DMake(26.889281, 75.836042)
let region = MKCoordinateRegion(center: coordinate, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
mapView.setRegion(region, animated: true)
var info1 = CustomPointAnnotation()
info1.coordinate = CLLocationCoordinate2DMake(26.889281, 75.836042)
info1.title = "Info1"
info1.subtitle = "Subtitle"
info1.imageName = "taxi"
var info2 = CustomPointAnnotation()
info2.coordinate = CLLocationCoordinate2DMake(26.862280, 75.815098)
info2.title = "Info2"
info2.subtitle = "Subtitle"
info2.imageName = "smile"
mapView.addAnnotation(info1)
mapView.addAnnotation(info2)
mapView.showAnnotations(mapView.annotations, animated: true)
}
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
print("delegate called")
if !(annotation is CustomPointAnnotation) {
return nil
}
let reuseId = "test"
var anView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId)
if anView == nil {
anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
anView?.canShowCallout = true
}
else {
anView?.annotation = annotation
}
//Set annotation-specific properties **AFTER**
//the view is dequeued or created...
let cpa = annotation as! CustomPointAnnotation
anView?.image = UIImage(named:cpa.imageName)
return anView
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidAppear(_ animated: Bool) {
}
}
class CustomPointAnnotation: MKPointAnnotation {
var imageName: String!
}
我认为这个方法没有调用viewForAnnotation
,尽管我将委托与viewcontroller : mapView.delegate = self
.
我仍然看到别针注释而不是custominnotation
在地图上: