Question

我想知道如何检查人是否在某个坐标附近，然后做一些事情，比如打个招呼进入测试台。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靠近某些坐标或地址？例如：

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

代码I已经完成：

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

我要做的是每当您更新用户的位置时，请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米范围内，则打印“Hello”。

下面是我用来获取用户和地址之间距离的代码。如果您有一个包含地址及其坐标的对象数组，则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)

Answer 2

获取两个坐标之间的距离，如果小于5米，则匹配show print statement

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

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

 CLLocationDistance distance = [locA distanceFromLocation:locB];

在给定的坐标附近，在Swift，MapKit和corelocation中打印hello

2 个答案: