Switch front/back camera with AVCaptureSession

Question

I\'m following the only answer this has on SO -

Switch cameras with avcapturesession

However cameraWithPosition does not seem to work. Deprecated?

Answer 1

Code update for Swift 4.2

/// Swap camera and reconfigures camera session with new input
fileprivate func swapCamera() {

    // Get current input
    guard let input = captureSession.inputs[0] as? AVCaptureDeviceInput else { return }

    // Begin new session configuration and defer commit
    captureSession.beginConfiguration()
    defer { captureSession.commitConfiguration() }

    // Create new capture device
    var newDevice: AVCaptureDevice?
    if input.device.position == .back {
        newDevice = captureDevice(with: .front)
    } else {
        newDevice = captureDevice(with: .back)
    }

    // Create new capture input
    var deviceInput: AVCaptureDeviceInput!
    do {
        deviceInput = try AVCaptureDeviceInput(device: newDevice!)
    } catch let error {
        print(error.localizedDescription)
        return
    }

    // Swap capture device inputs
    captureSession.removeInput(input)
    captureSession.addInput(deviceInput)
}

/// Create new capture device with requested position
fileprivate func captureDevice(with position: AVCaptureDevice.Position) -> AVCaptureDevice? {

    let devices = AVCaptureDevice.DiscoverySession(deviceTypes: [ .builtInWideAngleCamera, .builtInMicrophone, .builtInDualCamera, .builtInTelephotoCamera ], mediaType: AVMediaType.video, position: .unspecified).devices

    //if let devices = devices {
        for device in devices {
            if device.position == position {
                return device
            }
        }
    //}

    return nil
}