Swift-将MKAnnotationView添加到MKMapView [英] Swift - Add MKAnnotationView To MKMapView

问题描述

我正在尝试将MKAnnotationView添加到MKMapView，但是我做不到...有人可以帮助我吗?

I'm trying to add MKAnnotationView to MKMapView but I can't do it… Can anyone help me?

这是我的代码:

override func viewDidLoad() {
    super.viewDidLoad()
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.startUpdatingLocation()
    var latitude:CLLocationDegrees = locationManager.location.coordinate.latitude
    var longitude:CLLocationDegrees = locationManager.location.coordinate.longitude
    var homeLati: CLLocationDegrees = 40.01540192
    var homeLong: CLLocationDegrees = 20.87901079
    var latDelta:CLLocationDegrees = 0.01
    var longDelta:CLLocationDegrees = 0.01
    var theSpan:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta)
    var myHome:CLLocationCoordinate2D = CLLocationCoordinate2DMake(homeLati, homeLong)
    var myLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
    var theRegion:MKCoordinateRegion = MKCoordinateRegionMake(myLocation, theSpan)
    self.theMapView.setRegion(theRegion, animated: true)
    self.theMapView.mapType = MKMapType.Hybrid
    self.theMapView.showsUserLocation = true
    ///Red Pin
    var myHomePin = MKPointAnnotation()
    myHomePin.coordinate = myHome
    myHomePin.title = "Home"
    myHomePin.subtitle = "Bogdan's home"
    self.theMapView.addAnnotation(myHomePin)

    var anView:MKAnnotationView = MKAnnotationView()
    anView.annotation = myHomePin
    anView.image = UIImage(named:"xaxas")
    anView.canShowCallout = true
    anView.enabled = true
}

推荐答案

您需要实现viewForAnnotation委托方法并从那里返回MKAnnotationView.

You need to implement the viewForAnnotation delegate method and return an MKAnnotationView from there.

这是一个例子:

func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
    if (annotation is MKUserLocation) {
        //if annotation is not an MKPointAnnotation (eg. MKUserLocation),
        //return nil so map draws default view for it (eg. blue dot)...
        return nil
    }

    let reuseId = "test"

    var anView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId)
    if anView == nil {
        anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
        anView.image = UIImage(named:"xaxas")
        anView.canShowCallout = true
    }
    else {
        //we are re-using a view, update its annotation reference...
        anView.annotation = annotation
    }

    return anView
}

请记住，当您要使用自己的自定义图像时，需要创建一个 plain MKAnnotationView. MKPinAnnotationView应该仅用于标准的引脚注释.

Remember you need to create a plain MKAnnotationView when you want to use your own custom image. The MKPinAnnotationView should only be used for the standard pin annotations.

还请注意，您不应在调用startUpdatingLocation之后立即尝试访问locationManager.location.可能还没有准备好.

Also note you should not try to access locationManager.location immediately after calling startUpdatingLocation. It may not be ready yet.

使用didUpdateLocations委托方法.

您还需要致电requestAlwaysAuthorization/requestWhenInUseAuthorization(请参阅定位服务不可用在iOS 8中工作).

You also need to call requestAlwaysAuthorization/requestWhenInUseAuthorization (see Location Services not working in iOS 8).

这篇关于Swift-将MKAnnotationView添加到MKMapView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！