定位服务工作但经纬度根本没有加载

问题描述

我已经在我正在开发的 iOS 应用程序中成功设置了位置服务（用户可以在移动滑块后选择允许位置服务）但我的代码都没有尝试获取用户的当前位置（按长/纬度）正在工作。可以帮助找出可能出了什么问题...谢谢！

import UIKit
import MapKit
import CoreLocation

class SignUpSettingsViewController: UIViewController,CLLocationManagerDelegate {


@IBOutlet weak var locationOn: UISwitch!

var locationManager: CLLocationManager?

override func viewDidLoad() {
    super.viewDidLoad()
    
}


@IBAction func locationOn(_ sender: UISwitch) {
    
    
    if (sender.isOn == true){
        
        print("Location SLIDER TURNED ON")

        locationManager = CLLocationManager()
        locationManager?.delegate = self
        locationManager?.requestWhenInUseAuthorization()
        locationManager?.startUpdatingLocation()
    
        func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {
            guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else { return }
            print("locations = \(locValue.latitude) \(locValue.longitude)")
        }
        
        func locationManager2(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {
            if let location = locations.last {
                print(location.coordinate.latitude)
                print(location.coordinate.longitude)
            }
        }
        
        
        
    }
    
    else {
        print ("Location SLIDER NOT ON")
        
    }
    
}

解决方法

再看一遍。 您在 func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) 中定义了 @IBAction func locationOn(_ sender: UISwitch) 将其移入 class SignUpSettingsViewController

,

您在符合 CLLocationManager 委托方面犯了错误。 UIViewController 或其他类应该将委托实现为协议 f.e.通过扩展或在类声明后添加 CLLocationManagerDelegate 。尝试将您的文件代码替换为：

import UIKit
import MapKit
import CoreLocation
    
// MARK: - Location manager delegate

extension SignUpSettingsViewController: CLLocationManagerDelegate {

        func locationManager(_ manager: CLLocationManager,didChangeAuthorization status: CLAuthorizationStatus) {
            switch status {
            case .authorizedAlways: break
            case .authorizedWhenInUse: break
            case .denied,.restricted: break /// location permission denied,or updated in Settings
            case .notDetermined: break /// location permission wasn't selected
            @unknown default: break
            }
        }
        
        func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {
            guard let location = locations.last else { return }
            print(location)
      }    
}

// MARK: - SignUpSettingsViewController
    
final class SignUpSettingsViewController: UIViewController {
    
    @IBOutlet weak var locationOn: UISwitch!
        
    private let locationManager = CLLocationManager()
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    @IBAction func locationOn(_ sender: UISwitch) {
        if (sender.isOn == true) {
            print("Location SLIDER TURNED ON")
            locationManager.requestWhenInUseAuthorization()
            locationManager.startUpdatingLocation()
            locationManager.delegate = self
        } else {
            locationManager.delegate = nil
            print ("Location SLIDER NOT ON")
        }
    }
}

在这个函数中你应该处理你的位置权限

func locationManager(_ manager: CLLocationManager,didChangeAuthorization status: CLAuthorizationStatus) {
        switch status {
        case .authorizedAlways: break
        case .authorizedWhenInUse: break
        case .denied,or updated in Settings
        case .notDetermined: break /// location permission wasn't selected
        @unknown default: break
        }
    }

,

只需重新检查您的 info.plist 文件中需要添加的位置键即可。

另外一步是你需要保持

    func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) 

UISwitch 操作方法范围之外的方法。 我通过上述更改运行您的相同代码，它对我有用。

供您参考，请检查以下代码：

var locationManager: CLLocationManager?
@IBOutlet weak var locationOn: UISwitch!

override func viewDidLoad() {
    super.viewDidLoad()
}

@IBAction func locationOn(_ sender: UISwitch) {
    if (sender.isOn == true){
            print("Location SLIDER TURNED ON")

            locationManager = CLLocationManager()
            locationManager?.delegate = self
            locationManager?.requestWhenInUseAuthorization()
            locationManager?.startUpdatingLocation()
    

//            func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {
 //       guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else { return }

//                        print("locations = \(locValue.latitude) \(locValue.longitude)")
//                    }
            
//                func locationManager2(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {
//                    if let location = locations.last {
//                        print(location.coordinate.latitude)
//                        print(location.coordinate.longitude)
//                    }
//                }
            
        }
        
        else {
            print ("Location SLIDER NOT ON")
            
        }
}
//MARK: Location service Delegate
func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {
            guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else { return }
            print("locations = \(locValue.latitude) \(locValue.longitude)")
        }
        
}

祝你好运:)