How to find out if an application has access to the camera or not programmatically in iOS8

Question

My application uses a camera. In iOS8, they include a new privacy setting, Camera , where the user can control the use of camera rights for each application.

Problem:
If a user does not allow my application to use the camera, then how can I find out that my application does not have access for the camera.
how can I use ALAssetsLibrary authorizationStatus to find out the status of the photo library or ABAddressBookGetAuthorizationStatus to find out the status of access to the phone book.

Question:
How can I find out if my application has camera access or not in iOS8, so that I can offer the user to allow camera access for my application?

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I have below print screen photo paper that have the same problem as my application.

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If there is no access to the camera, only a black screen will be displayed. No messages.

Answer 1

Check AVAuthorizationStatus for camera availability, and then handle cases accordingly

 AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; if(status == AVAuthorizationStatusAuthorized) { // authorized } else if(status == AVAuthorizationStatusDenied){ // denied } else if(status == AVAuthorizationStatusRestricted){ // restricted } else if(status == AVAuthorizationStatusNotDetermined){ // not determined [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) { if(granted){ NSLog(@"Granted access"); } else { NSLog(@"Not granted access"); } }]; }