获取错误消息“委托必须回复位置管理器：didfailwitherror：''尝试使用Swift在iOS上获得GPS坐标时

Question

在尝试使用（Swift，SwiftUi）在以下教程上获得iOS上的GPS坐标时，我会收到以下错误消息：

错误消息

Thread 1: "Delegate must respond to locationManager:didFailWithError:"

教程的URL

https://www.hackingwithswift.com/quick-start/swiftui/how-to-read-the-users-location-using-locationbutton

我的问题是：

• 教程不完整吗？
• 我是否必须添加一些其他代码才能尝试此应用？
• 错误消息是什么意思？

代码（取自教程）是：

import SwiftUI

import CoreLocation
import CoreLocationUI

class LocationManager: NSObject, ObservableObject, CLLocationManagerDelegate {
    
    let manager = CLLocationManager()

    @Published var location: CLLocationCoordinate2D?

    override init() {
        super.init()
        manager.delegate = self
    }

    func requestLocation() {
        manager.requestLocation()
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        location = locations.first?.coordinate
    }
}

struct ContentView: View {
    @StateObject var locationManager = LocationManager()

    var body: some View {
        VStack {
            
            if let location = locationManager.location {
                Text("Your location: \(location.latitude), \(location.longitude)")
            }
            
            LocationButton {
                locationManager.requestLocation()
            }
            .frame(height: 44)
            .padding()
        }
    }
}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

Answer 1

正如Kishan Bhatiya评论中建议的那样，代码的以下添加（通过提供错误处理）：

import SwiftUI

import CoreLocation
import CoreLocationUI

class LocationManager: NSObject, ObservableObject, CLLocationManagerDelegate {
    
    let manager = CLLocationManager()

    @Published var location: CLLocationCoordinate2D?

    override init() {
        super.init()
        manager.delegate = self
    }

    func requestLocation() {
        manager.requestLocation()
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        location = locations.first?.coordinate
    }
    
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        // Error handling
        print("Error requesting location")
    }
}

struct ContentView: View {
    @StateObject var locationManager = LocationManager()

    var body: some View {
        VStack {
            
            if let location = locationManager.location {
                Text("Your location: \(location.latitude), \(location.longitude)")
            }
            
            LocationButton {
                locationManager.requestLocation()
            }
            .frame(height: 44)
            .padding()
        }
    }
}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}