我拒绝首次启动应用程序的位置权限,当用户点击位置按钮时,我想显示要求许可的警告对话框。
这是我的sudo代码
点击位置按钮
if dont have location permission {
ask for permission
} else {
get current location
}
这是我的代码。请检查我的代码中的注释。希望你能理解我的问题。谢谢。
@IBAction func getCurrentLocationButtonClick(_ sender: UIButton) {
///////////How to implement that sudo code/////////////////////////////
///////////Why This method is not calling for second time /////////////
// locationManager.desiredAccuracy = kCLLocationAccuracyBest
// locationManager.requestWhenInUseAuthorization()
// locationManager.requestLocation()
/////////////////////////////////////////////////////
locationManager.startUpdatingLocation()
}
override func viewWillAppear(_ animated: Bool) {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.requestLocation()
}
extension NotificationCenterViewController : CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
/*
if status == .denied {
let alertController = UIAlertController(title: "Error", message: "We need your location.plese give permission", preferredStyle: .alert)
let OKAction = UIAlertAction(title: "OK", style: .default) { (action) in
//Ask for location permission
}
alertController.addAction(OKAction)
self.present(alertController, animated: true)
}
*/
if status == .authorizedWhenInUse {
locationManager.requestLocation()
// locationManager.startLocationUpdates()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation: CLLocation = locations[0]
locationManager.stopUpdatingLocation()
let latitude = userLocation.coordinate.latitude
let longitude = userLocation.coordinate.longitude
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error)
print("error:: (error)")
}
}
答案 0 :(得分:3)
当您发现该位置被拒绝时,您只能打开应用设置 这是带有
的警报示例let alertController = UIAlertController (title: "Title", message: "Go to Settings?", preferredStyle: .alert)
let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
return
}
if UIApplication.shared.canOpenURL(settingsUrl) {
UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
print("Settings opened: \(success)") // Prints true
})
}
}
alertController.addAction(settingsAction)
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alertController.addAction(cancelAction)
present(alertController, animated: true, completion: nil)
答案 1 :(得分:0)
您可以通过在您的位置管理器上调用requestWhenInUseAuthorization()来请求权限。您的伪代码的问题在于您不应该每次都这样做,而应该只执行一次,之后用户应该转到“设置”以更改权限。 CLLocationManager保存可以为此检查的权限状态。您可以在IBAction中执行类似的操作
let status = CLLocationManager.authorizationStatus()
if status == .notDetermined {
locationManager.requestWhenInUseAuthorization()
return
}
if status == .denied || status == .restricted {
//Display alert that user needs to enable permissions in Settings
// or open settings directly as in the other answer
showAlert()
return
}
//Code to get location here....