ios之在 Swift Playground 实例中运行 CoreLocation

我试图制作一个基本类的原型(prototype)来处理为我的应用程序获取地理坐标，并想在 Swift Playground 实例中运行它，但委托(delegate)似乎没有被调用。

下面是代码。 RE 的任何建议:调试会有所帮助。

是否可以在 IDE 中运行。

// Playground - noun: a place where people can play 
 
import UIKit 
import CoreLocation 
 
 
var str = "Hello, playground" 
 
 
class GeoCordDelegate: NSObject, CLLocationManagerDelegate { 
 
    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) { 
        println("Updated Location") 
        println(locationMgr.location.coordinate.latitude) 
        println(locationMgr.location.coordinate.longitude) 
    } 
 
 
    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) { 
        println("Error while updating location " + error.localizedDescription) 
    } 
 
} 
 
 
let locationMgr = CLLocationManager() 
 
locationMgr.delegate = GeoCordDelegate() 
locationMgr.desiredAccuracy = kCLLocationAccuracyBest 
locationMgr.startUpdatingLocation() 

请您参考如下方法:

对于 Xcode 9

import CoreLocation 
import PlaygroundSupport 
 
PlaygroundPage.current.needsIndefiniteExecution = true  
 
// Address to Geocode 
let address = "Champ de Mars, 5 Avenue Anatole France, 75007 Paris, France" 
 
print("Starting Geocoding") 
CLGeocoder().geocodeAddressString(address) { placemarks, error in 
  let coordinate = placemarks!.first!.location!.coordinate 
  print("Completed Geocoding, Latitude: \(coordinate.latitude), Longitude: \(coordinate.longitude)") 
  PlaygroundPage.current.finishExecution()  
} 
 
print("End of Playground")