Swift游乐场的核心定位

我正在尝试检索用户的当前位置，但在Swift操场中。我已经有了这段代码，但出于某种原因，它从未执行print语句。有人能帮忙吗

import UIKit  
import CoreLocation  
import PlaygroundSupport  

var str = "Hello, playground"  
let locationManager = CLLocationManager()  
PlaygroundPage.current.needsIndefiniteExecution = true  

class GeoCoordinateDelegate: NSObject, CLLocationManagerDelegate {  

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {  
        let location = locations[0]  
        print("Most Recent Location: " + location.description)  
        print(location.coordinate.latitude)  
        print(location.coordinate.longitude)  
    }  

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {  
        print("Error while updating " + error.localizedDescription)  
    }  

}  
let geoCoordinateDelegate = GeoCoordinateDelegate()  
locationManager.delegate = geoCoordinateDelegate  
locationManager.desiredAccuracy = kCLLocationAccuracyBest  
locationManager.startUpdatingLocation()  

---

编写CoreLocation代码时，最好先检查

CLLocationManager.locationServicesEnabled（）

，然后再尝试执行任何与位置相关的操作

在Swift游乐场（2017-03-21的1.2版）中，该方法返回

false

，因为核心位置不适用于游乐场（尚未？）。我建议在