如何在iOS的Mapbox中向MGLAnnotation添加属性

class CustomAnnotation: MGLPointAnnotation {
    var customProperty: String?
}

let annotation = CustomAnnotation()
annotation.coordinate = CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194)
annotation.title = "San Francisco"
annotation.subtitle = "California"
annotation.customProperty = "Custom Property Value"

mapView.addAnnotation(annotation)

func mapView(_ mapView: MGLMapView, viewFor annotation: MGLAnnotation) -> MGLAnnotationView? {
    if let customAnnotation = annotation as? CustomAnnotation {
        // 处理自定义标注对象的属性
        let annotationView = MGLAnnotationView(reuseIdentifier: "customAnnotation")
        // 设置标注视图的外观等
        return annotationView
    }
    return nil
}