Camera working without camera permission dialog box in iOS 12

Question

In iOS 11 when the app is launch first time and I will click on the button of the camera then it will show the dialog box of Camera Permission.

But in iOS 12 when I click on camera button it with directly open the camera without any permission.

I have already added Privacy - Camera Usage Description in my Info.plist file.

I am confused what to do? Please give me some solution.

+(void)checkPermissionForCameraWithSuccess:(void (^) (void))successHandler  failure:(void (^) (void))failureHandler
{
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];

    switch (status)
    {
        case AVAuthorizationStatusRestricted:
        case AVAuthorizationStatusDenied:{
            if (failureHandler)
                dispatch_async (dispatch_get_main_queue (), ^{ failureHandler (); });
        }; break;
        case AVAuthorizationStatusAuthorized:{
            if (successHandler)
                dispatch_async (dispatch_get_main_queue (), ^{ successHandler (); });
        }; break;
        case AVAuthorizationStatusNotDetermined:
        {
            [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
                if (!granted)
                {
                    if (failureHandler) {
                        dispatch_async (dispatch_get_main_queue (), ^{ failureHandler (); });
                    }
                } else {
                    if (successHandler) {
                        dispatch_async (dispatch_get_main_queue (), ^{ successHandler (); });
                    }
                }
            }];
            break;
        }
        default:
            break;
    }
}

Note: By default, it will return status = AVAuthorizationStatusAuthorized without any permission dialog box.