swift - Swift Playground 中的 CoreLocation

Question

我正在尝试检索用户的当前位置，但在 Swift Playgrounds 中。我已经有了这段代码，但由于某种原因它从不执行打印语句。谁能帮忙？

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()  

Answer 1

编写 CoreLocation 代码时，最好在尝试执行任何与位置相关的操作之前检查 CLLocationManager.locationServicesEnabled()。

在 Swift Playgrounds(2017 年 3 月 21 日的 1.2)中，该方法返回 false，因为 CoreLocation 不适用于 playgrounds(还？)。我建议在 https://bugreport.apple.com/ 提交错误报告