ios - plus - ¿Cómo verificar si el usuario dio permiso para usar la cámara?

manual iphone modelo a1387 emc 2430

Question

Intentando escribir esto:

if usergavepermissiontousercamera
opencamera
else
showmycustompermissionview

No se pudo encontrar una forma actual de hacer esta tarea simple.
Nota: También debería funcionar iOS7 incluso si requiere un método diferente

Answer 1

Esto abrirá la cámara cuando el usuario otorgue permiso. De lo contrario, muestre alerta por pedir permiso.

func openCamera(){
let authStatus = AVCaptureDevice.authorizationStatus(for: AVMediaType.video)
switch (authStatus){
case .notDetermined:
showAlert(title: "Unable to access the Camera", message: "To enable access, go to Settings > Privacy > Camera and turn on Camera access for this app.")
case .restricted:
showAlert(title: "Unable to access the Camera", message: "To enable access, go to Settings > Privacy > Camera and turn on Camera access for this app.")
case .denied:
showAlert(title: "Unable to access the Camera", message: "To enable access, go to Settings > Privacy > Camera and turn on Camera access for this app.")
case .authorized:
alert.dismiss(animated: true, completion: nil)
if(UIImagePickerController .isSourceTypeAvailable(.camera)){
picker.sourceType = .camera
picker.showsCameraControls=true
picker.allowsEditing=true
self.viewController!.present(picker, animated: true, completion: nil)
}
}
}

después de esta llamada esta función para mostrar alerta

func showAlert(title:String, message:String) {
let alert = UIAlertController(title: title,
message: message,
preferredStyle: UIAlertController.Style.alert)
let okAction = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alert.addAction(okAction)
let settingsAction = UIAlertAction(title: "Settings", style: .default, handler: { _ in
// Take the user to Settings app to possibly change permission.
guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else { return }
if UIApplication.shared.canOpenURL(settingsUrl) {
if #available(iOS 10.0, *) {
UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
// Finished opening URL
})
} else {
// Fallback on earlier versions
UIApplication.shared.openURL(settingsUrl)
}
}
})
alert.addAction(settingsAction)
self.viewController!.present(alert, animated: true, completion: nil)
}

Answer 2

La siguiente es una respuesta limpia actualizada para Swift 4.x:

A partir de iOS 10, también debe solicitar permiso en el archivo info.plist para evitar un bloqueo:

Privacidad - Descripción del uso de la cámara

Debe proporcionar una cadena que se presente al usuario con esta clave. De lo contrario, se producirá un bloqueo al intentar acceder a la cámara.

import AVFoundation
func checkCameraAccess() {
switch AVCaptureDevice.authorizationStatus(for: .video) {
case .denied:
print("Denied, request permission from settings")
presentCameraSettings()
case .restricted:
print("Restricted, device owner must approve")
case .authorized:
print("Authorized, proceed")
case .notDetermined:
AVCaptureDevice.requestAccess(for: .video) { success in
if success {
print("Permission granted, proceed")
} else {
print("Permission denied")
}
}
}
}
func presentCameraSettings() {
let alertController = UIAlertController(title: "Error",
message: "Camera access is denied",
preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "Cancel", style: .default))
alertController.addAction(UIAlertAction(title: "Settings", style: .cancel) { _ in
if let url = URL(string: UIApplicationOpenSettingsURLString) {
UIApplication.shared.open(url, options: [:], completionHandler: { _ in
// Handle
})
}
})
present(alertController, animated: true)
}

Esto probará las cuatro respuestas posibles y, a continuación, solicitará permiso si no está notDetermined o dirigirá al usuario a la configuración para habilitarlo si se denied . Si está restricted , es posible que el usuario actual no pueda habilitarlo, pero debe proporcionarles algún tipo de orientación.

Answer 3

Modifiqué la respuesta anterior y eliminé la solicitud inicial, ya que cuando queremos usar la cámara del dispositivo, el sistema solicita permisos en sí:

func checkPermissions() {
let authStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
switch authStatus {
case .authorized:
setupCamera()
case .denied:
alertPromptToAllowCameraAccessViaSetting()
default:
// Not determined fill fall here - after first use, when is''t neither authorized, nor denied
// we try to use camera, because system will ask itself for camera permissions
setupCamera()
}
}
func alertPromptToAllowCameraAccessViaSetting() {
let alert = UIAlertController(title: "Error", message: "Camera access required to...", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Cancel", style: .default))
alert.addAction(UIAlertAction(title: "Settings", style: .cancel) { (alert) -> Void in
UIApplication.shared.openURL(URL(string: UIApplicationOpenSettingsURLString)!)
})
present(alert, animated: true)
}

Answer 4

Puede importar el marco de AVFoundation y utilizar el métodoautorizationStatus authorizationStatus(for:) que se muestra a continuación y manejar los casos respectivos.

switch AVCaptureDevice.authorizationStatus(for: .video) {
case .authorized: // The user has previously granted access to the camera.
self.setupCaptureSession()
case .notDetermined: // The user has not yet been asked for camera access.
AVCaptureDevice.requestAccess(for: .video) { granted in
if granted {
self.setupCaptureSession()
}
}
case .denied: // The user has previously denied access.
return
case .restricted: // The user can''t grant access due to restrictions.
return
}

Answer 5

Puede usar el siguiente código para hacer lo mismo:

if AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) == AVAuthorizationStatus.Authorized {
// Already Authorized
} else {
AVCaptureDevice.requestAccessForMediaType(AVMediaTypeVideo, completionHandler: { (granted: Bool) -> Void in
if granted == true {
// User granted
} else {
// User rejected
}
})
}

NOTA:

1. Asegúrese de agregar el Marco AVFoundation en la sección Enlace binario de las fases de compilación
2. Debe escribir import AVFoundation en su clase para importar AVFoundation

SWIFT 3

if AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo) == AVAuthorizationStatus.authorized {
// Already Authorized
} else {
AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: { (granted: Bool) -> Void in
if granted == true {
// User granted
} else {
// User Rejected
}
})
}

Swift 4

if AVCaptureDevice.authorizationStatus(for: .video) == .authorized {
//already authorized
} else {
AVCaptureDevice.requestAccess(for: .video, completionHandler: { (granted: Bool) in
if granted {
//access allowed
} else {
//access denied
}
})
}

Answer 6

Solución actualizada Swift 3.0

func callCamera(){
let myPickerController = UIImagePickerController()
myPickerController.delegate = self;
myPickerController.sourceType = UIImagePickerControllerSourceType.camera
self.present(myPickerController, animated: true, completion: nil)
NSLog("Camera");
}
func checkCamera() {
let authStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
switch authStatus {
case .authorized: callCamera() // Do your stuff here i.e. callCameraMethod()
case .denied: alertPromptToAllowCameraAccessViaSetting()
case .notDetermined: alertToEncourageCameraAccessInitially()
default: alertToEncourageCameraAccessInitially()
}
}
func alertToEncourageCameraAccessInitially() {
let alert = UIAlertController(
title: "IMPORTANT",
message: "Camera access required for capturing photos!",
preferredStyle: UIAlertControllerStyle.alert
)
alert.addAction(UIAlertAction(title: "Cancel", style: .default, handler: nil))
alert.addAction(UIAlertAction(title: "Allow Camera", style: .cancel, handler: { (alert) -> Void in
UIApplication.shared.openURL(URL(string: UIApplicationOpenSettingsURLString)!)
}))
present(alert, animated: true, completion: nil)
}
func alertPromptToAllowCameraAccessViaSetting() {
let alert = UIAlertController(
title: "IMPORTANT",
message: "Camera access required for capturing photos!",
preferredStyle: UIAlertControllerStyle.alert
)
alert.addAction(UIAlertAction(title: "Dismiss", style: .cancel) { alert in
if AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo).count > 0 {
AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo) { granted in
DispatchQueue.main.async() {
self.checkCamera() } }
}
}
)
present(alert, animated: true, completion: nil)
}