Get_DepthData

Get_DepthData.swift

import UIKit
import AVFoundation
 
class ViewController: UIViewController, AVCapturePhotoCaptureDelegate {

    private var videoPreviewLayer: AVCaptureVideoPreviewLayer?
    private var stillImageOutput = AVCapturePhotoOutput()
    private var captureSession = AVCaptureSession()
    private var capturepDevice: AVCaptureDevice?
    private var session: AVCaptureSession?
    private var previewLayer: CALayer?
    private var preview = UIView()
    private var bt = UIButton()

    override func viewDidLoad() {
        super.viewDidLoad()
        
        bt.frame = CGRect(x: 0,
                          y: view.frame.height - 200,
                          width: self.view.frame.width,
                          height: 100)
        bt.addTarget(self, action: #selector(takePhoto), for: .touchUpInside)
        bt.setTitle("Button", for: .normal)
        bt.setTitleColor(.black, for: .normal)

        preview.frame = self.view.bounds
        view.addSubview(preview)
    }

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

        prepareCamera()
        beginSession()
        preview.addSubview(bt)
    }

    private func prepareCamera() {

        if let availableDevice = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInTrueDepthCamera,
                                                                                .builtInDualCamera,
                                                                                .builtInWideAngleCamera],
                                                                                mediaType: .video,
                                                                                position: .back).devices.first {
            capturepDevice = availableDevice
        }
    }

    private func beginSession() {
        guard let capturepDevice = capturepDevice else { return }
        captureSession.beginConfiguration()
        captureSession.sessionPreset = .photo

        do {
            let captureDeviceInput = try AVCaptureDeviceInput(device: capturepDevice)
            captureSession.addInput(captureDeviceInput)
        } catch {
            print(error.localizedDescription)
        }

        let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        self.previewLayer = previewLayer
        self.previewLayer?.frame = preview.frame
        preview.layer.addSublayer(previewLayer)
 
        let dataOutput = AVCaptureVideoDataOutput()
        dataOutput.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String:kCVPixelFormatType_32BGRA]

        if captureSession.canAddOutput(dataOutput) {
            captureSession.addOutput(dataOutput)
            captureSession.addOutput(stillImageOutput)
            captureSession.commitConfiguration()
        }

        if stillImageOutput.isDepthDataDeliverySupported {
            stillImageOutput.isHighResolutionCaptureEnabled = true
            stillImageOutput.isDepthDataDeliveryEnabled = stillImageOutput.isDepthDataDeliverySupported
        }
    
        if captureSession.isRunning { return }
        captureSession.startRunning()
    }
    
    @objc private func takePhoto() {

        let photoSettings = AVCapturePhotoSettings()
        photoSettings.flashMode = .auto
        photoSettings.isHighResolutionPhotoEnabled = true

        if photoSettings.availablePreviewPhotoPixelFormatTypes.count > 0 {
            photoSettings.previewPhotoFormat = [kCVPixelBufferPixelFormatTypeKey as String : photoSettings.availablePreviewPhotoPixelFormatTypes.first!]
        }

        if stillImageOutput.isDepthDataDeliveryEnabled {
            photoSettings.isDepthDataDeliveryEnabled = true
        }
        stillImageOutput.capturePhoto(with: photoSettings, delegate: self)
    }

    // Delegate: AVCapturePhotoCaptureDelegate
    func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {

        print(photo.depthData, "photo")
    }
}

It can be used on iPhones that have this function.

.builtInTrueDepthCamera,
.builtInDualCamera,
.builtInWideAngleCamera

Don't forget to set info plist