ios - 使用 Xcode 7 Swift2 更改 MKMapView 上的图钉图像

Question

我添加了以下代码，但无法看到新图像的任何引脚更改，并且没有显示错误。 map.delegate = self 已完成。我们需要添加任何代码才能使其工作吗？有帮助吗？

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let userLocation:CLLocation = locations[0] as CLLocation
    let span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta)
    let region:MKCoordinateRegion = MKCoordinateRegionMake(userLocation.coordinate, span)


    routeMapView.setRegion(region, animated: true)

    currentLocationAnnotation.coordinate = userLocation.coordinate
    mapView(routeMapView, viewForAnnotation: currentLocationAnnotation)!.annotation = currentLocationAnnotation
    routeMapView.addAnnotation(currentLocationAnnotation)
    //print("getting current location..")
    getCurrentLocationAddress(userLocation)

    userCurrentLocation = userLocation
    userLocationSpan = span
    counter++

}


func mapView(mapView: MKMapView,
    viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {

        if annotation is MKUserLocation {
            //return nil so map view draws "blue dot" for standard user location
            return nil
        }

        let reuseId = "pin"
        var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
        if pinView == nil {
            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
            pinView!.canShowCallout = true
            pinView!.animatesDrop = true
            pinView!.image = UIImage(named:"first")!
            print(pinView!.image!)
            routeMapView.delegate = self
        }
        else {
            pinView!.annotation = annotation
        }

        return pinView
}

Answer 1

我不确定您是否已经在 viewDidLoad 方法中为您的 mapView 设置了委托(delegate)。如果没有，请这样做。因为在 viewForAnnotation 中设置它永远不会调用这个委托(delegate)方法。将 routeMapView.delegate = self 从 viewForAnnotation 移动到 viewDidLoad 方法。