在给定坐标附近，在 Swift、MapKit 和 corelocation 中打印 hello

Question

我想知道如何检查人是否在某个坐标附近，然后向控制台打招呼之类的操作进行测试。现在我已经有了用户位置，每次人移动时它都会更新，但是如何知道他是否在某个坐标或地址附近？例如：

func sayHello(){
if mapView.userLocation.coordinate.latitude == 26{
print("Hello")
}

我已经完成的代码：

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {

    @IBOutlet weak var mapView: MKMapView!

    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.locationManager.delegate = self
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
        self.locationManager.requestAlwaysAuthorization()
        self.locationManager.startUpdatingLocation()
        self.mapView.showsUserLocation = true



    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
    {
        let location = locations.last

        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)

        self.locationManager.stopUpdatingLocation()
    }

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError)
    {
        print("Errors: " + error.localizedDescription)
    }
}

Answer 1

获取两个坐标之间的距离，如果小于 5m 则匹配 show print 语句

CLLocation *locA = [[CLLocation alloc] initWithLatitude:lat1 longitude:long1];

 CLLocation *locB = [[CLLocation alloc] initWithLatitude:lat2 longitude:long2];

 CLLocationDistance distance = [locA distanceFromLocation:locB];

Answer 2

我会做的是每次更新用户位置时，检查用户位置与您存储的地址位置之间的距离。如果用户在 x 米以内，则打印 "Hello"。

下面是我用来获取您的用户和地址之间的距离的代码。如果您有一个对象数组，其中包含您的地址及其坐标，您可以遍历每个地址并为 x 米内的每个地址打印 Hello。

let userLocation:CLLocation = CLLocation(latitude: 10.000, longitude: 29.000)
let addressLocation:CLLocation = CLLocation(latitude: 15.000, longitude: 20.000)
let meters:CLLocationDistance = userLocation.distanceFromLocation(addressLocation)

在给定坐标附近，在 Swift、MapKit 和 corelocation 中打印 hello

Near given coordinates, print hello in Swift, MapKit and corelocation

xcode

core-location

mapkit

ios

swift