Camera access with Rectangle capabilities (Objc iOS) - ios

Question

I need some help with our CameraView inside our app. We have built a CameraView with Rectangle / Zoom capabilities (in a webView). When integrating this webCameraView in our app, accessing the camera does not work. Seems like we do have 2 options:
Make the app allow camera access from a webView (is this still not possible 2021?)
Build a copy of the webCameraView directly in the app with rectangle frame instead
Above is what the webCameraView looks like in the app. Rectangle / Zoom is displayed, but the app does not get access to the camera.
If it is not possible to access camera directly in the app via a webView I need to go for alternative nr 2.
I will try to build the same UI via Objc in the app directly. But good updated tutorials for Objc is hard to find or being outdated. All Swift boys have taken over the town! This what I have done so far:
- (void) viewDidLoad {
//-- Setup Capture Session.
_captureSession = [[AVCaptureSession alloc] init];
//-- Creata a video device and input from that Device. Add the input to the capture session.
AVCaptureDevice * videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if(videoDevice == nil)
assert(0);
//-- Add the device to the session.
NSError *error;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice
error:&error];
if(error)
assert(0);
[_captureSession addInput:input];
//-- Configure the preview layer
_previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:_captureSession];
_previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[_previewLayer setFrame:CGRectMake(0, 0,
self.view.frame.size.width,
self.view.frame.size.height)];
//-- Add the layer to the view that should display the camera input
[self.view.layer addSublayer:_previewLayer];
//-- Start the camera
[_captureSession startRunning];
[super viewDidLoad];
}
The code above gives me access to the camera
How do I create a dragable Rectangle / Zoom area in the middle of the screen via Objc?
Also With capabilities to take a photo (and the photo taken should only represent the inside-area of the rectangle-area) ?
Help!

Answer 1

The sample code you provided is for native camera control， I wonder what it has to do with webview camera?
If you want to turn on the system camera in webview and process the acquired content, you can try to look at webrtc. This has version restrictions, but it is open in WKWebView after iOS 14.3.