快速将图像添加到MKMapAnnotation

编程问答 2022-06-08

问题描述

Final result

这是整个代码 导入UIKit 导入MapKit 导入CoreLocation 导入Firebase

MapViewController类：UIViewController，CLLocationManagerDelegate，UINavigationControllerDelegate，UIImagePickerControllerDelegate {

@IBOutlet weak var MapButton: UITabBarItem!
@IBOutlet weak var mapView: MKMapView!

按下此按钮后，用户必须拍照，并且照片必须在注释中可见

@IBAction func pluspressed(_ sender: UIButton) {

//保护let currLoc = locationManager.location else {return} 

    currentLocation = locationManager.location
    
    let annotation = MKPointAnnotation()
    annotation.coordinate = CLLocationCoordinate2D(latitude: currentLocation.coordinate.latitude,longitude: currentLocation.coordinate.longitude)
    mapView.addAnnotation(annotation)
    
    let vc = UIImagePickerController()
    vc.sourceType = .camera
    vc.allowsEditing = true
    vc.delegate = self
    present(vc,animated: true)
    
    func imagePickerController(_ picker: UIImagePickerController,didFinishPickingMediawithInfo info: [UIImagePickerController.InfoKey : Any]) {
        picker.dismiss(animated: true)

        guard let image = info[.editedImage] as? UIImage else {
            print("No image found")
            return
        }

        // print out the image size as a test
        print("Image sent")
    }
    
    func mapView(_ mapView: MKMapView,viewFor annotation: MKAnnotation) -> MKAnnotationView? {
            if annotation.isKind(of: MKUserLocation.self) {  //Handle user location annotation..
                return nil  //Default is to let the system handle it.
            }

            if !annotation.isKind(of: ImageAnnotation.self) {  //Handle non-ImageAnnotations..
                var pinAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: "DefaultPinView")
                if pinAnnotationView == nil {
                    pinAnnotationView = MKPinAnnotationView(annotation: annotation,reuseIdentifier: "DefaultPinView")
                }
                return pinAnnotationView
            }

            //Handle ImageAnnotations..
            var view: ImageAnnotationView? = mapView.dequeueReusableAnnotationView(withIdentifier: "imageAnnotation") as? ImageAnnotationView
            if view == nil {
                view = ImageAnnotationView(annotation: annotation,reuseIdentifier: "imageAnnotation")
            }

            let annotation = annotation as! ImageAnnotation
            view?.image = annotation.image
            view?.annotation = annotation

            return view
        }
    
}

func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {

//保护位置= location.last其他{返回} //让center = CLLocationCoordinate2D（纬度：location.coordinate.latitude，经度：location.coordinate.longitude） // let region = MKCoordinateRegion.init（center：center，latitudinalMeters：regionInMeters，portraitMeters：regionInMeters） // mapView.setRegion（region，animation：true） } 

func locationManager(_ manager: CLLocationManager,didChangeAuthorization status: CLAuthorizationStatus) {
    checkLocationAuthorization()
}

}

class ImageAnnotation：NSObject，MKAnnotation { var座标：CLLocationCoordinate2D var image：UIImage？ var colour：UIColor？

override init() {
    self.coordinate = CLLocationCoordinate2D()
    self.image = ///// Somehow here must go the image taken by camera from the code above
    self.colour = UIColor.systemGreen
}

}

解决方法

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