Swift – 将MKAnnotationView添加到MKMapView

概述我试图将MKAnnotationView添加到MKMapView，但是我无法做到这一点…任何人都可以帮我把MKAnnotationView添加到MKMapView？ 这是我的代码： override func viewDidLoad() { super.viewDidLoad() locationManager.desiredAccuracy = kCLLocationAccura 我试图将MKAnnotationVIEw添加到MKMapVIEw，但是我无法做到这一点…任何人都可以帮我把MKAnnotationVIEw添加到MKMapVIEw？

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}

您需要实现vIEwForAnnotation委托方法并从那里返回一个MKAnnotationVIEw。

以下是一个例子：

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}

记住，当您要使用自己的自定义图像时，您需要创建一个简单的MKAnnotationVIEw。 MKPinAnnotationVIEw只能用于标准引脚注释。

另请注意，您不应该在调用startUpdatingLocation之后立即尝试访问locationManager.location。它可能还没有准备好

使用dIDUpdateLocations委托方法。

您还需要调用requestAlwaysAuthorization / requestWhenInUseAuthorization(请参阅Location Services not working in iOS 8)。

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