如何在相同的注解视图下更改mapkit中的引脚颜色（swift3）

我在mapkit中有两个引脚，都在同一个注释视图下，所以它使得两个引脚都是相同的颜色。 我怎样才能使针脚不同的颜色。 我想你好是红色和hellox是蓝色的。

import UIKit import MapKit class ViewController: UIViewController, MKMapViewDelegate { @IBOutlet var jmap: MKMapView! override func viewDidLoad() { jmap.delegate = self; let hello = MKPointAnnotation() hello.coordinate = CLLocationCoordinate2D(latitude: 40, longitude: -73) jmap.addAnnotation(hello) let hellox = MKPointAnnotation() hellox.coordinate = CLLocationCoordinate2D(latitude: 34, longitude: -72) jmap.addAnnotation(hellox) } func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? { let annotationView = MKPinAnnotationView() annotationView.pinTintColor = .blue return annotationView }} 

Answer 1

子类MKPointAnnotation添加所需的任何自定义属性，如pinTintColor ：

 class MyPointAnnotation : MKPointAnnotation { var pinTintColor: UIColor? } class ViewController: UIViewController, MKMapViewDelegate { @IBOutlet var jmap: MKMapView! override func viewDidLoad() { super.viewDidLoad() jmap.delegate = self let hello = MyPointAnnotation() hello.coordinate = CLLocationCoordinate2D(latitude: 40, longitude: -73) hello.pinTintColor = .red let hellox = MyPointAnnotation() hellox.coordinate = CLLocationCoordinate2D(latitude: 34, longitude: -72) hellox.pinTintColor = .blue jmap.addAnnotation(hello) jmap.addAnnotation(hellox) } func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? { var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "myAnnotation") as? MKPinAnnotationView if annotationView == nil { annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "myAnnotation") } else { annotationView?.annotation = annotation } if let annotation = annotation as? MyPointAnnotation { annotationView?.pinTintColor = annotation.pinTintColor } return annotationView } }