CODEWITHSUNDEEP
iosiphoneipadios-camera
lucaslt89
lucaslt89

Reputation: 2451

iOS Camera permissions doesn't appear under settings in some devices

I'm having some issues trying to use the camera. The problem is that some devices show me the Camera entry under settings, and some others don't. In those devices where the Camera switch doesn't appear, I'm not able to use the camera, since it doesn't have permissions, and it also doesn't appear under settings to enable them.

This is how it looks on a device that works:

enter image description here

And this is how it looks in devices that doesn't work.

enter image description here

When I took those screenshots, the application should've asked for permissions already, but it didn't.

I also verified that those devices doesn't have Restrictions enabled.

Any ideas?

UPDATE 1: Added code

This is the code I'm using to show the camera (it's under a custom view, not the native camera view controller)

self.captureSession = [[AVCaptureSession alloc] init];
AVCaptureDevice *videoCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *videoInput = [AVCaptureDeviceInput deviceInputWithDevice:videoCaptureDevice error:&error];
if(videoInput)
{
    [self.captureSession addInput:videoInput];
}
else
{
    NSLog(@"Error: %@", error);
}

AVCaptureMetadataOutput *metadataOutput = [[AVCaptureMetadataOutput alloc] init];
[self.captureSession addOutput:metadataOutput];
[metadataOutput setMetadataObjectsDelegate:self
                                     queue:dispatch_get_main_queue()];
[metadataOutput setMetadataObjectTypes:@[AVMetadataObjectTypeCode39Code, AVMetadataObjectTypeQRCode]];

AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession];
previewLayer.frame = self.view.layer.bounds;
UIView * previewView = [[UIView alloc] initWithFrame:self.view.frame];
[previewView.layer addSublayer:previewLayer];
[self.view addSubview:previewView];
[self.view sendSubviewToBack:previewView];

[self.captureSession startRunning];

Upvotes: 13

Views: 12687

Answers (5)

Chathura Palihakkara
Chathura Palihakkara

Reputation: 934

If the above solutions didn't work you may consider checking this setting on iOS device.

enter image description here

Upvotes: 0

Lance Samaria
Lance Samaria

Reputation: 19572

I need the camera to user ARKit. Every time the vc with sceneView is shown I run the checkCameraPermission() in viewWillAppear. If the user doesn't allow access an alert will show with a settingsButton. Once they press that button they will be taken to Settings and the camera icon with the toggle switch will always be there.

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    checkCameraPermission()
}

func checkCameraPermission() {

    let authorizationStatus = AVCaptureDevice.authorizationStatus(for: AVMediaType.video)
    switch authorizationStatus {

    case .notDetermined:
        AVCaptureDevice.requestAccess(for: AVMediaType.video) { [weak self](granted) in
            if granted {
                print("access granted")
                DispatchQueue.main.async { [weak self] in
                    self?.startSceneViewSession()
                }

            } else {
                print("access denied")
                DispatchQueue.main.async { [weak self] in
                    self?.alertUserCameraPermissionMustBeEnabled()
                }
            }
        }

    case .authorized:
        print("Access authorized")
        startSceneViewSession()

    case .denied, .restricted:
        print("restricted")
        alertUserCameraPermissionMustBeEnabled()

    @unknown default:
        fatalError()
    }
}

func alertUserCameraPermissionMustBeEnabled() {

    let message = "Camera access is necessary to use Augemented Reality for this app.\n\nPlease go to Settings to allow access to the Camera.\n Please switch the button to the green color."

    let alert = UIAlertController (title: "Camera Access Required", message: message, preferredStyle: .alert)

    let settingsAction = UIAlertAction(title: "Settings", style: .default, handler: { (action) in

        guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else { return }

        if UIApplication.shared.canOpenURL(settingsUrl) {
            UIApplication.shared.open(settingsUrl, completionHandler: { (_) in
            })
        }
    })

    alert.addAction(settingsAction)

    present(alert, animated: true, completion: nil)
}

// this is for ARKit
func startSceneViewSession() {
    sceneView.session.run(configuration)
    sceneView.isPlaying = true
}

Upvotes: 1

jimijon
jimijon

Reputation: 2156

I had the same problem until I changed my camera type to wide:

   let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInWideAngleCamera], mediaType: AVMediaType.video, position: .back)

Upvotes: 0

Aaron Brager
Aaron Brager

Reputation: 66242

You need to request permission before opening a session. Use 

[AVCaptureDevice requestAccessForMediaType:completionHandler:]

Upvotes: 9

Vicky
Vicky

Reputation: 1095

Step 1: Give a proper camera message access message on your info.plist using the following key (without quotes) 

"Privacy - Camera Usage Description"

Step 2 : For objective-C/SWIFT you need to request a camera access permission

OBJECTIVE-C

[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted)
        {
            if (granted == true)
            {
                //[self presentViewController           : picker animated:YES completion:NULL];
               //Do your stuff

            }
            else
            {
                UIAlertView *cameraAlert = [[UIAlertView alloc]initWithTitle:STR_APPLICATION_TITLE
                                                                     message:STR_ALERT_CAMERA_DENIED_MESSAGE
                                                                    delegate:self
                                                           cancelButtonTitle:@"OK"
                                                           otherButtonTitles:nil,nil];
                [cameraAlert show];

                NSLog(@"denied");
            }

        }];

SWIFT

AVCaptureDevice.requestAccessForMediaType(AVMediaTypeVideo, completionHandler: { (videoGranted: Bool) -> Void in
        if (videoGranted) {
             //Do Your stuff here

        } else {
            // Rejected Camera
        }
    })

Upvotes: 3

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