MKMapView：自定义视图代替了注释钉

Question

我要显示图像MKMapView而不是小别针。有人可以在这里放置一些有用的代码，或告诉它怎么做吗？谢谢！编辑-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation {MKPinAnnotationView *pinView = nil; if(annotation != mapView.userLocation) {    static NSString *defaultPinID = @"com.invasivecode.pin";    pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];    if ( pinView == nil ) pinView = [[MKPinAnnotationView alloc]                                      initWithAnnotation:annotation reuseIdentifier:defaultPinID];    pinView.pinColor = MKPinAnnotationColorGreen;     pinView.canShowCallout = YES;    pinView.animatesDrop = YES;    pinView.image = [UIImage imageNamed:@"pinks.jpg"];    //as suggested by Squatch} else {    [mapView.userLocation setTitle:@"I am here"];}return pinView;}我希望我的图片pinks.jpg会显示在地图上，固定位置而不是默认的大头针视图（摇滚大头针形）。但是我仍然得到该引脚的默认图像。

Answer 1

这是Swift 3的答案。如果可能，它将使注释视图出队，否则将创建新视图：

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

    // Don't want to show a custom image if the annotation is the user's location.

    guard !(annotation is MKUserLocation) else {

        return nil

    }

    // Better to make this class property

    let annotationIdentifier = "AnnotationIdentifier"

    var annotationView: MKAnnotationView?

    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {

        annotationView = dequeuedAnnotationView

        annotationView?.annotation = annotation

    }

    else {

        annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)

        annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)

    }

    if let annotationView = annotationView {

        // Configure your annotation view here

        annotationView.canShowCallout = true

        annotationView.image = UIImage(named: "yourImage")

    }

    return annotationView

}

Swift 2.2：

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

    // Don't want to show a custom image if the annotation is the user's location.

    guard !annotation.isKindOfClass(MKUserLocation) else {

        return nil

    }

    // Better to make this class property

    let annotationIdentifier = "AnnotationIdentifier"

    var annotationView: MKAnnotationView?

    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(annotationIdentifier) {

        annotationView = dequeuedAnnotationView

        annotationView?.annotation = annotation

    }

    else {

        let av = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)

        av.rightCalloutAccessoryView = UIButton(type: .DetailDisclosure)

        annotationView = av

    }

    if let annotationView = annotationView {

        // Configure your annotation view here

        annotationView.canShowCallout = true

        annotationView.image = UIImage(named: "yourImage")

    }

    return annotationView

}

Answer 2

我同意安娜的答案，我想展示一下swift3的外观。这个答案与其他许多选项一样，比如调整图像大小，从array和ect中获取图像列表。

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

        if let annotation = annotation as? PetrolStation {

            let identifier = "pinAnnotation"

            var view: MKAnnotationView

            if let dequeuedView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)

                as? MKPinAnnotationView { // 2

                dequeuedView.annotation = annotation

                view = dequeuedView

            } else {

                // 3

                view = MKAnnotationView(annotation: annotation, reuseIdentifier: identifier)

                view.canShowCallout = true

                //here We put a coordinates where we like to show bubble with text information up on the pin image

                view.calloutOffset = CGPoint(x: -7, y: 7)

                //Here this is a array of images

                let pinImage = PetrolItem[activePlace].imgPetrol?[activePlace]

                //Here we set the resize of the image

                let size = CGSize(width: 30, height: 30)

                UIGraphicsBeginImageContext(size)

                pinImage?.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))

                let resizeImage = UIGraphicsGetImageFromCurrentImageContext()

                UIGraphicsEndImageContext()

                view.image = resizeImage

                //Here we like to put into bubble window a singe for detail Informations

                view.rightCalloutAccessoryView = UIButton(type: .detailDisclosure) as UIView

               //Here we make change of standard pin image with our image

                view.image = resizeImage

            }

            return view

        }

        return nil

    }