ios - 使用默认 map View 图钉的 Swift Mapview 自定义标注 View

Question

我相信这将是一个非常简单的答案，但我一直在努力弄清楚如何使用 map View 默认图钉添加自定义标注 View 。使用我当前的代码，我似乎只能将图像添加为 MKPointAnnotation 而不是默认引脚。第一个“viewFor 注释”是我设置默认引脚的方式，而下面的所有内容都是针对自定义标注 View 的……我想要做的是使用默认引脚设置自定义标注 View 。如果我想要自定义调出 View ，是否必须添加自定义图像图钉？

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation { return nil }

    if let annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "") {
        annotationView.annotation = annotation
        return annotationView
    } else {
        let annotationView = MKPinAnnotationView(annotation:annotation, reuseIdentifier:"")
        annotationView.isEnabled = true
        annotationView.canShowCallout = true

        let btn = UIButton(type: .detailDisclosure)
        annotationView.rightCalloutAccessoryView = btn
        return annotationView
    }
}


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

    if annotation is MKUserLocation { return nil }
    var annotationView = self.mapView.dequeueReusableAnnotationView(withIdentifier: "Pin")
    if annotationView == nil{
        annotationView = CustomBusinessCallOutAnnotatiion(annotation: annotation, reuseIdentifier: "Pin")
        annotationView?.canShowCallout = false
    }else{
        annotationView?.annotation = annotation
    }
    annotationView?.image = UIImage(named: "car")
    return annotationView
}

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {

    if view.annotation is MKUserLocation { return }

    let customAnnotation = view.annotation as! CustomBusinessPoint
    let views = Bundle.main.loadNibNamed("CustomBusinessCallOut", owner: nil, options: nil)
    let calloutView = views?[0] as! CustomBusinessCallOut


    calloutView.businessName.text = customAnnotation.businessName
    calloutView.businessStreet.text = customAnnotation.businessStreet
    calloutView.businessState.text = customAnnotation.businessState
    calloutView.businessDistance.text = customAnnotation.businessDistance


    calloutView.center = CGPoint(x: view.bounds.size.width / 2, y: -calloutView.bounds.size.height * -0.0001)
    view.addSubview(calloutView)
    mapView.setCenter((view.annotation?.coordinate)!, animated: true)
}

func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) {
    if view.isKind(of: CustomBusinessCallOutAnnotatiion.self) {
        for subview in view.subviews {
            subview.removeFromSuperview()
        }
    }
}

Answer 1

您不需要添加 SubView calloutView。您可以使用 MKAnnotationView 作为自定义标注。

例如你应该整理源码

实现 MKAnnotation 和 MKAnnotationView 的子类。

class PinAnnotation : NSObject, MKAnnotation {
    var coordinate : CLLocationCoordinate2D
    var title: String?
    var calloutAnnotation: CustomBusinessCallOut?

    init(location coord:CLLocationCoordinate2D) {
        self.coordinate = coord
        super.init()
    }
}

class CustomBusinessCallOut : NSObject, MKAnnotation {
    var coordinate: CLLocationCoordinate2D
    var title: String?

    init(location coord:CLLocationCoordinate2D) {
        self.coordinate = coord
        super.init()
    }
}

class CalloutAnnotationView : MKAnnotationView {
}

实现 mapView 委托(delegate)方法。

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    if annotation is MKUserLocation {
        return nil
    }

    if annotation is PinAnnotation {
        let reuseId = "Pin"
        var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId) as? MKPinAnnotationView
        if pinView == nil {
            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
        }
        else {
            pinView?.annotation = annotation
        }

        return pinView
    } else if annotation is CustomBusinessCallOut {
        let reuseId = "Callout"
        var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId)
        if pinView == nil {
            pinView = CalloutAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
            pinView?.addSubview(UIImageView(image: UIImage(named: "car")))
        }
        else {
            pinView?.annotation = annotation
        }

        return pinView
    } else {
        return nil
    }
}

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    guard view.annotation is PinAnnotation else { return }
    if let pinAnnotation = view.annotation as? PinAnnotation {
        let calloutAnnotation = CustomBusinessCallOut(location: pinAnnotation.coordinate)
        calloutAnnotation.title = pinAnnotation.title
        pinAnnotation.calloutAnnotation = calloutAnnotation
        mapView.addAnnotation(calloutAnnotation)
    }
}

func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) {
    guard view.annotation is PinAnnotation else { return }
    if let pinAnnotation = view.annotation as? PinAnnotation,
        let calloutAnnotation = pinAnnotation.calloutAnnotation {
        mapView.removeAnnotation(calloutAnnotation)
        pinAnnotation.calloutAnnotation = nil
    }
}