Swift中的MapKit,第2部分

发布时间：2020-12-14 04:34:52 所属栏目：百科来源：网络整理

导读：我正在尝试使用 Swift中的Map Kit.我尝试在地图上显示区域,一个引脚(MKPinAnnotationView)和当前位置.一切都很好.我尝试添加Disclosure Button并拦截它. Disclosure Button已添加,但无法拦截攻丝. 函数pinPressed方法calloutAccessoryControlTapped不起作用

我正在尝试使用 Swift中的Map Kit.我尝试在地图上显示区域,一个引脚(MKPinAnnotationView)和当前位置.一切都很好.我尝试添加Disclosure Button并拦截它. Disclosure Button已添加,但无法拦截攻丝.

函数pinPressed方法calloutAccessoryControlTapped不起作用….

这是一个示例代码：

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController,MKMapViewDelegate,CLLocationManagerDelegate {

@IBOutlet weak var mainMapView: MKMapView!

var locationManager = CLLocationManager()

override func viewDidLoad() {
    super.viewDidLoad()

    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.requestAlwaysAuthorization()
    locationManager.startUpdatingLocation()

    var objectLatitude = 53.204526
    var objectLongitude = 50.111751

    var currentLatitude = 53.203715
    var currentLongitude =  50.160374

    var latDelta = 0.05
    var longDelta = 0.05

    var currentLocationSpan: MKCoordinateSpan = MKCoordinateSpanMake(latDelta,longDelta)
    var currentLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(locationManager.location.coordinate.latitude,locationManager.location.coordinate.longitude)
    var currentRegion: MKCoordinateRegion = MKCoordinateRegionMake(currentLocation,currentLocationSpan)
    self.mainMapView.setRegion(currentRegion,animated: true)

    var objectLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(objectLatitude,objectLongitude)
    var objectAnnotation = MKPointAnnotation()
    objectAnnotation.coordinate = objectLocation
    objectAnnotation.title = "St. George's Church"
    objectAnnotation.subtitle = "Church of the Great Martyr St. George"
    self.mainMapView.addAnnotation(objectAnnotation)
}

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

        if annotation is MKUserLocation {
            //return nil so map view draws "blue dot" for standard user location
            return nil
        }

        let reuseId = "pin"

        var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
        if pinView == nil {
            pinView = MKPinAnnotationView(annotation: annotation,reuseIdentifier: reuseId)
            pinView!.canShowCallout = true
            pinView!.animatesDrop = true
            pinView!.pinColor = .Purple
            pinView!.rightCalloutAccessoryView = UIButton.buttonWithType(.DetailDisclosure) as UIButton
        }
        else {
            pinView!.annotation = annotation
        }
        return pinView
}

func pinPressed(mapView: MKMapView!,annotationView: MKAnnotationView,calloutAccessoryControlTapped control: UIControl) {

    if control == annotationView.rightCalloutAccessoryView {
        println("Disclosure Pressed!")
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}
}

解决方法

calloutAccessoryControlTapped委托方法必须命名为mapView(annotationView：calloutAccessoryControlTapped :).

您不能使用自己的名称,如pinPressed(…).

这适用于任何委托方法,并由协议规定.

所以它应该是：

func mapView(mapView: MKMapView!,calloutAccessoryControlTapped control: UIControl) {

    if control == annotationView.rightCalloutAccessoryView {
        println("Disclosure Pressed!")
    }
}

（编辑：李大同）

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