地图框注记标注

Question

我最近决定从Mapkit改为Mapbox。我在地图中实现了注记，但由于某种原因，单击注记时未显示注记标注。我很困惑，不确定为什么没有出现。希望有人能帮忙！相应的代码如下所示：

import UIKit
import Firebase
import Mapbox
class ViewController: UIViewController, SideBarDelegate, MGLMapViewDelegate {

@IBOutlet weak var mapView: MGLMapView!

//Filtering annotations for sidebar
func sideBarDidSelectButtonAtIndex(_ index: Int) {
   mapView.removeAnnotations(mapView.annotations!)
    for park in skateparks {
        if index == 0 {
            addAnnotation(park: park)
        }
        if index == 1 && park.type == .park {
            addAnnotation(park: park)
        }
        if index == 2 && park.type == .street {
            addAnnotation(park: park)
        }

    }
}
var sideBar: SideBar = SideBar()
var skateparks = [Skatepark]()
let locationsRef = FIRDatabase.database().reference(withPath: "locations")
override func viewDidLoad() {
    super.viewDidLoad()

    //Location
    mapView.delegate = self
    mapView.showsUserLocation = true
    //Sidebar
    sideBar = SideBar(sourceView: self.view, skateItems: ["All Skate Spots", "Skateparks", "Street Skating"])
    sideBar.delegate = self

    // Passing firebase annotation data
    locationsRef.observe(.value, with: { snapshot in
        self.skateparks.removeAll()
        for item in snapshot.children {
            guard let snapshot = item as? FIRDataSnapshot else { continue }
            let newSkatepark = Skatepark(snapshot: snapshot)
            self.skateparks.append(newSkatepark)
            self.addAnnotation(park: newSkatepark)
        }
    })
}
override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    view.sendSubview(toBack: mapView)
}

func addAnnotation(park: Skatepark) {
    let point = MGLPointAnnotation()
    point.coordinate = park.coordinate
    point.title = park.name
    point.subtitle = park.subtitle
    mapView.addAnnotation(point)
    mapView.selectAnnotation(point, animated: true)
}
}
func mapView(mapView: MGLMapView, viewForAnnotation annotation: MGLAnnotation) -> MGLAnnotationView? {
return nil
}

func mapView(mapView: MGLMapView, annotationCanShowCallout annotation: MGLAnnotation) -> Bool {
return true
}

Answer 1

更新你的 SWIFT 3 函数：

  func mapView(_ mapView: MGLMapView, annotationCanShowCallout annotation: MGLAnnotation) -> Bool { // Always try to show a callout when an annotation is tapped. return true }

 func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
}

Answer 2

您可能会发现此示例很有帮助(如果您还没有看过它(！ 它演示如何使用 Mapbox 标注委托。