Swift:MapKit自定义图像注释

Question

在我的应用程序中,我有一个不同颜色的mapkit和注释.但是,只有三种颜色选项(红色,绿色,紫色).所以,我需要使用自定义图像更改注释.

我按照本教程创建了mapview

现在,我有一个艺术作品课:

import Foundation
import MapKit

class Artwork: NSObject, MKAnnotation {
    let title: String
    let locationName: String
    let color: String
    let coordinate: CLLocationCoordinate2D

    init(title: String, locationName: String, color: String, coordinate: CLLocationCoordinate2D) {
        self.title = title
        self.locationName = locationName
        self.color = color
        self.coordinate = coordinate

        super.init()
    }

    var subtitle: String {
        return locationName
    }

    // pinColor for disciplines: Sculpture, Plaque, Mural, Monument, other
    func pinColor() -> MKPinAnnotationColor  {
        switch color {
        case "Red":
            return .Red
        case "Purple":
            return .Purple
        case "Green":
            return .Green
        default:
            return .Green
        }
    }
}

另外,VCMapView.swift文件:

import Foundation
import MapKit

extension MapViewController: MKMapViewDelegate {

    // 1
    func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
        if let annotation = annotation as? Artwork {
            let identifier = "pin"
            var view: MKPinAnnotationView
            if let dequeuedView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)
                as? MKPinAnnotationView { // 2
                    dequeuedView.annotation = annotation
                    view = dequeuedView
            } else {
                // 3
                view = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
                view.canShowCallout = true
                view.calloutOffset = CGPoint(x: -5, y: 5)
                view.rightCalloutAccessoryView = UIButton.buttonWithType(.DetailDisclosure) as! UIView
            }
            view.pinColor = annotation.pinColor()
            return view
        }
        return nil
    }
}

我可以在viewdidload()中在我的地图上添加引脚

// show artwork on map
let artwork = Artwork(title: "\(self.plate)",
locationName: "\(self.location)",
color: "\(self.color)",
coordinate: CLLocationCoordinate2D(latitude: latitude, longitude: longtitude))

self.mapView.addAnnotation(artwork)

所有工作都很完美,但需要为这个架构添加自定义图像,我应该修改哪个部分我不确定.

Answer 1

在我看来,在你的架构中,你应该在Artwork类中添加一个image属性,然后在.image属性中使用id MKPinAnnotationView.

例如:

view = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
view.canShowCallout = true
view.calloutOffset = CGPoint(x: -5, y: 5)
view.rightCalloutAccessoryView = UIButton.buttonWithType(.DetailDisclosure) as! UIView
            }
view.image = UIImage(named:"your_image")
view.frame.size = CGSize(width: 30.0, height: 30.0) //not necessary but just to give you an idea how to resize just in case it is too large.