iOS Swift 如何打开位置权限弹出窗口

Question

var locMgr = INTULocationManager.sharedInstance()
    locMgr.requestLocation(withDesiredAccuracy: .city, timeout: 30, delayUntilAuthorized: true,block: {(currentLoc: CLLocation!, achievedAccuracy: INTULocationAccuracy, status: INTULocationStatus) -> Void in
        if status == INTULocationStatus.success {
        }
        else{
        }

使用 INTULocationManager , Swift 4.1 , iOS 11.1

如果第一次运行此代码弹出位置权限请求

但如果我拒绝了，下次就不会弹出了。

如何打开权限弹窗？

我创建按钮

运行这个代码

let locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()

但没用

Answer 1

这是默认行为。首次显示弹出窗口后。随后的请求将被视为已拒绝或在第一个 select 上 selected 的任何内容。但是，您可以实现自己的警报，并直接将用户发送到设置应用以授予位置访问权限，如下所示：

//check if user has denied the access on first popup
    if !permissionGranted {

        let permissionAlert = UIAlertController(title: "Location Access", message: "Requires location access to take advantage of this feature. Please provide location access from settings", preferredStyle: .alert)

        let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
        let settingAction = UIAlertAction(title: "Settings", style: .default) { (action) in
            guard let appSettingURl = URL(string: UIApplicationOpenSettingsURLString) else { return }
            if UIApplication.shared.canOpenURL(appSettingURl) {
                UIApplication.shared.open(appSettingURl, options: [:], completionHandler: nil)
            }
        }
        permissionAlert.addAction(cancelAction)
        permissionAlert.addAction(settingAction)
        present(permissionAlert, animated: true, completion: nil)
    }

Answer 2

如果用户拒绝权限则打开权限弹出窗口

 /*  func checkLocation() {
    if CLLocationManager.authorizationStatus() != .authorizedWhenInUse
    {
        print("requesting autorization")
        locationManager.requestWhenInUseAuthorization()

    } else {
        print("start updating location")
    }
}*/

func askEnableLocationService() ->String {
    var showAlertSetting = false
    var showInitLocation = false
    if CLLocationManager.locationServicesEnabled() {
        switch CLLocationManager.authorizationStatus() {
        case .denied:
            showAlertSetting = true
            print("HH: kCLAuthorizationStatusDenied")
        case .restricted:
            showAlertSetting = true
            print("HH: kCLAuthorizationStatusRestricted")
        case .authorizedAlways:
            showInitLocation = true
            print("HH: kCLAuthorizationStatusAuthorizedAlways")
        case .authorizedWhenInUse:
            showInitLocation = true
            print("HH: kCLAuthorizationStatusAuthorizedWhenInUse")
        case .notDetermined:
            showInitLocation = true
            print("HH: kCLAuthorizationStatusNotDetermined")
        default:
            break
        }
    }else{
        showAlertSetting = true
        print("HH: locationServicesDisabled")

    }
    if showAlertSetting {
        let alertController = UIAlertController(title: "xxxxxx", message: "Please enable location service in the settings", preferredStyle: .alert)
        let OKAction = UIAlertAction(title: "OK", style: .default) { (action:UIAlertAction!) in



            if let url = URL(string: UIApplicationOpenSettingsURLString) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            }

        }
        alertController.addAction(OKAction)
        self.window?.rootViewController?.present(alertController, animated: true, completion:nil)

    }
    if showInitLocation {

        return "YES"

    }
    return "NO"

}

Answer 3

没有任何默认功能会在用户拒绝权限后弹出位置权限。您需要向用户显示需要权限的警报，然后将用户重定向到“设置”屏幕。这是您可以使用的完整代码。定义一个函数来检查位置权限。

    func hasLocationPermission() -> Bool {
        var hasPermission = false
        if CLLocationManager.locationServicesEnabled() {
            switch CLLocationManager.authorizationStatus() {
            case .notDetermined, .restricted, .denied:
                hasPermission = false
            case .authorizedAlways, .authorizedWhenInUse:
                hasPermission = true
            }
        } else {
            hasPermission = false
        }
        
        return hasPermission
    }

现在通过此功能检查位置权限并在需要时显示警报。

    if !hasLocationPermission() {
            let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: UIAlertControllerStyle.alert)
            
            let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
                //Redirect to Settings app
                UIApplication.shared.open(URL(string:UIApplicationOpenSettingsURLString)!)
            })
            
            let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel)
            alertController.addAction(cancelAction)
            
            alertController.addAction(okAction)
            
            self.present(alertController, animated: true, completion: nil)
        }

另外别忘了导入 CoreLocation.

Swift 5.3 和 iOS 14 版本

func hasLocationPermission() -> Bool {
    var hasPermission = false
    let manager = CLLocationManager()
    
    if CLLocationManager.locationServicesEnabled() {
        switch manager.authorizationStatus {
        case .notDetermined, .restricted, .denied:
            hasPermission = false
        case .authorizedAlways, .authorizedWhenInUse:
            hasPermission = true
        @unknown default:
                break
        }
    } else {
        hasPermission = false
    }
    
    return hasPermission
}

if !hasLocationPermission() {
    let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: .alert)
    
    let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
        //Redirect to Settings app
        UIApplication.shared.open(URL(string:UIApplication.openSettingsURLString)!)
    })
    
    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)
    alertController.addAction(cancelAction)
    
    alertController.addAction(okAction)
    
    self.present(alertController, animated: true, completion: nil)
}

Answer 4

Swift 5

一旦用户拒绝权限，您的应用的警报就会被禁用，并且不会再次显示。您可以向用户显示需要权限的弹出窗口。

这是您可以使用的完整代码

  if CLLocationManager.locationServicesEnabled() {
        switch CLLocationManager.authorizationStatus() {
        case .notDetermined, .restricted, .denied:
            showPermissionAlert()
        case .authorizedAlways, .authorizedWhenInUse:
            locationManager.startUpdatingLocation()
        }
    } else {
       locationManager.startUpdatingLocation()
    }

现在通过此功能检查位置权限并在需要时显示警报。

   func showPermissionAlert(){
    let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: UIAlertController.Style.alert)

    let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
        //Redirect to Settings app
        UIApplication.shared.open(URL(string:UIApplication.openSettingsURLString)!)
    })

    let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel)
    alertController.addAction(cancelAction)

    alertController.addAction(okAction)

    self.present(alertController, animated: true, completion: nil)
}

Answer 5

Complete Solution : (iOS 14+ and also for prior versions)

1)首先获取授权状态：-

func locationAuthorizationStatus() -> CLAuthorizationStatus {
        let locationManager = CLLocationManager()
        var locationAuthorizationStatus : CLAuthorizationStatus
        if #available(iOS 14.0, *) {
            locationAuthorizationStatus =  locationManager.authorizationStatus
        } else {
            // Fallback on earlier versions
            locationAuthorizationStatus = CLLocationManager.authorizationStatus()
        }
        return locationAuthorizationStatus
    }

2)然后检查位置权限：-

func hasLocationPermission() -> Bool {
        var hasPermission = false
        let manager = self.locationAuthorizationStatus()
        
        if CLLocationManager.locationServicesEnabled() {
            switch manager {
            case .notDetermined, .restricted, .denied:
                hasPermission = false
            case .authorizedAlways, .authorizedWhenInUse:
                hasPermission = true
            @unknown default:
                    break
            }
        } else {
            hasPermission = false
        }
        
        return hasPermission
    }

3)然后显示警报

if !hasLocationPermission() {
    let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: .alert)
    
    let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
        //Redirect to Settings app
        UIApplication.shared.open(URL(string:UIApplication.openSettingsURLString)!)
    })
    
    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)
    alertController.addAction(cancelAction)
    
    alertController.addAction(okAction)
    
    self.present(alertController, animated: true, completion: nil)
}

干杯 :) :)

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