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{
        }

二手INTULocationManager，Swift 4.1，iOS 11.1

如果是第一次运行此代码，则会弹出“位置许可请求”

但是如果我拒绝，则下次不会弹出。

如何打开权限弹出？

我创建按钮

运行此代码

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

但没有用

Answer 1

用户拒绝权限后，没有任何默认功能会弹出位置权限。您需要向用户显示警告，提示需要权限，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。定义一个将检查位置权限的功能。

    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)
        }