iOS:Swift - 如何在触摸时添加精确定位点并获取该位置的详细地址？

Question

我想在触摸iOS地图时添加注释并获取相应位置的详细地址(地标).我如何在Swift中实现这一目标？

提前致谢.

Answer 1

要对地图上的触摸做出反应,您需要为mapView设置点按识别器

在viewDidLoad:

let gestureRecognizer = UITapGestureRecognizer(target: self, action:"handleTap:")
    gestureRecognizer.delegate = self
    mapView.addGestureRecognizer(gestureRecognizer)

处理水龙头并获取轻敲的位置坐标:

func handleTap(gestureReconizer: UILongPressGestureRecognizer) {

    let location = gestureReconizer.locationInView(mapView)
    let coordinate = mapView.convertPoint(location,toCoordinateFromView: mapView)

    // Add annotation:
    let annotation = MKPointAnnotation()
    annotation.coordinate = coordinate
    mapView.addAnnotation(annotation)
}

现在,您只需实现MKMapView委托函数来绘制注释.一个简单的谷歌搜索应该可以让你完成剩下的工作.

Answer 2

这是一个工作正常的Xcode 10.1，Swift 4.2项目，具有MapKit委托来控制注释（图钉颜色，图钉图像等），并委托来处理对添加的注释的单击： Github Project

import UIKit
import MapKit

class ViewController: UIViewController {

@IBOutlet weak var mapView: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()
    mapView.delegate = self
    let longTapGesture = UILongPressGestureRecognizer(target: self, action: #selector(longTap))
    mapView.addGestureRecognizer(longTapGesture)
}

@objc func longTap(sender: UIGestureRecognizer){
    print("long tap")
    if sender.state == .began {
        let locationInView = sender.location(in: mapView)
        let locationOnMap = mapView.convert(locationInView, toCoordinateFrom: mapView)
        addAnnotation(location: locationOnMap)
    }
}

func addAnnotation(location: CLLocationCoordinate2D){
        let annotation = MKPointAnnotation()
        annotation.coordinate = location
        annotation.title = "Some Title"
        annotation.subtitle = "Some Subtitle"
        self.mapView.addAnnotation(annotation)
}
}

extension ViewController: MKMapViewDelegate{

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    guard annotation is MKPointAnnotation else { print("no mkpointannotaions"); return nil }

    let reuseId = "pin"
    var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId) as? MKPinAnnotationView

    if pinView == nil {
        pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
        pinView!.canShowCallout = true
        pinView!.rightCalloutAccessoryView = UIButton(type: .infoDark)
        pinView!.pinTintColor = UIColor.black
    }
    else {
        pinView!.annotation = annotation
    }
    return pinView
}

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    print("tapped on pin ")
}

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
    if control == view.rightCalloutAccessoryView {
        if let doSomething = view.annotation?.title! {
           print("do something")
        }
    }
  }
}