如何在 IOS 中使用 mapkit 在地图上显示用户

Question

如何在 IOS 中使用 mapkit 在地图上显示用户。此代码仅在地图上显示印度，而不是定义的坐标。

    mapView.delegate = self;
    mapView.showsUserLocation = YES;
    objLocationManager = [[CLLocationManager alloc] init];
    objLocationManager.distanceFilter = kCLDistanceFilterNone;
    objLocationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
    objLocationManager.delegate = self;
    #ifdef __IPHONE_8_0
    if(IS_OS_8_OR_LATER) {
        // Use one or the other, not both. Depending on what you put in info.plist
        //[objLocationManager requestWhenInUseAuthorization];
        [objLocationManager requestAlwaysAuthorization];
    }
    #endif
   [objLocationManager startUpdatingLocation];

    mapView.showsUserLocation = YES;
    [mapView setMapType:MKMapTypeStandard];
    [mapView setZoomEnabled:YES];
    [mapView setScrollEnabled:YES];
     mapView.delegate=self;

Answer 1

您正在开始位置更新，您将通过它获取当前位置，但是 MKMapview 将如何知道位置更改？ 要使 MKMap View 采用 Location 更改，您必须将委托设置为 MKMapview，并且您已经完成了该部分，但您忘记了委托方法。

- (void)mapView:(MKMapView *)aMapView didUpdateUserLocation:(MKUserLocation *)aUserLocation {}

此委托方法会将您当前的位置发送到您所需要的地图视图。 如果要使用默认的 Delegate 方法，则必须使用从 CLLocation 更新方法接收到的当前坐标在地图上放置标记。

如果您要使用默认委托方法，请不要忘记确认 MKMapViewDelegate。

如果工作，请告诉我们，我相信它会...祝你有美好的一天

Answer 2

步骤：1 - 导入

import MapKit
import CoreLocation

步骤：2 -添加代表

MKMapViewDelegate,CLLocationManagerDelegate

步骤：3 -声明

@IBOutlet var mapView: MKMapView!
var locationManager = CLLocationManager()
var myLocation = CLLocation()

步骤：4 -在 ViewDidLoad 内部

locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled()
    {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.distanceFilter = kCLDistanceFilterNone
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.startUpdatingLocation()
    }

//MARK: - MapView and Location Manager -
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
    self.myLocation = locations.last!
    print("NewLocation \(locations[0].coordinate.latitude) \(locations[0].coordinate.longitude)")
}

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView?
{
    let annotationIdentifier = "AnnotationIdentifier"
    var annotationView: MKAnnotationView?
    if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {
        annotationView = dequeuedAnnotationView
        annotationView?.annotation = annotation
    }
    else
    {
        let av = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
        av.rightCalloutAccessoryView = UIButton(type: .roundedRect)
        annotationView = av
    }

    if let annotationView = annotationView
    {
        annotationView.canShowCallout = true
        annotationView.image = UIImage(named: "Location")
    }
    return annotationView
}

self.mapView.showsUserLocation = true

 let geoCoder = CLGeocoder()
                        geoCoder.geocodeAddressString(address!) { (placemarks, error) in
                            guard
                                let placemarks = placemarks,
                                let location = placemarks.first?.location
                                else
                            {
                                return
                            }

                            let newPin = MKPointAnnotation()
                            let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
                            let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
                            self.mapView.setRegion(region, animated: true)

                            newPin.title = address
                            newPin.coordinate = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
                            self.mapView.addAnnotation(newPin)
                        }

@IBAction func btnDirection(_ sender: Any)
{
    let address = self.dictEventDetails.object(forKey: "address") as? String
    let geoCoder = CLGeocoder()
    geoCoder.geocodeAddressString(address!) { (placemarks, error) in
        guard
            let placemarks = placemarks,
            let location = placemarks.first?.location
            else
        {
            return
        }
        let coordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
        let mapItem = MKMapItem(placemark: MKPlacemark(coordinate: coordinate, addressDictionary:nil))
        mapItem.name = address
        mapItem.openInMaps(launchOptions:nil)
    }
}