Does apple provides any API or something to access the camera, like facetime?

Apple provides a wide range of APIs for accessing the camera, including the front-facing FaceTime camera. These APIs are part of the AVFoundation framework, which provides a comprehensive set of tools for working with audio and video data.

To access the camera, you can use the AVCaptureSession class. This class allows you to create a capture session, which is a collection of inputs and outputs that work together to capture and process media data. To add a camera input to a capture session, you can use the AVCaptureDeviceInput class. This class represents a physical camera device, and it provides methods for configuring the device's settings, such as the resolution and frame rate.

Once you have created a capture session, you can start capturing data by calling the startRunning() method. This will start the capture session and begin capturing data from the camera. You can then access the captured data by creating an AVCaptureOutput object, such as an AVCaptureVideoDataOutput object. This object will receive the captured video data and you can use it to process the data in any way you want.

Here is an example of how to use the AVFoundation framework to capture video data from the front-facing camera:

import AVFoundation

// Create a capture session
let captureSession = AVCaptureSession()

// Add a front-facing camera input to the capture session
let frontCameraDevice = AVCaptureDevice.default(for: .video, facing: .front)
let frontCameraInput = try! AVCaptureDeviceInput(device: frontCameraDevice!)
captureSession.addInput(frontCameraInput)

// Create a video data output for the capture session
let videoOutput = AVCaptureVideoDataOutput()
videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue.main)
captureSession.addOutput(videoOutput)

// Start the capture session
captureSession.startRunning()

This code will create a capture session with a front-facing camera input and a video data output. The video data output will be configured to receive captured video data on the main queue. When the capture session is started, it will begin capturing video data from the front-facing camera and the data will be delivered to the video data output.

The AVFoundation framework also provides a number of other APIs for working with the camera, including APIs for capturing still images, recording videos, and applying image effects. For more information, please refer to the AVFoundation framework documentation.