How do I do camera capture?

To create a camera capture experience, especially one that can be accessed from the lock screen, you can follow the guidelines and use the tools introduced in the session Build a great Lock Screen camera capture experience at WWDC 2024. Here are the key steps and considerations:

1. Create a Locked Camera Capture Extension:

   • This new extension type allows your app to provide a camera capture experience directly from the lock screen.
   • The extension should provide a camera viewfinder immediately upon launch. If it doesn't, the system will terminate the extension.

2. Handle Hardware Button Events:

   • Use AVCaptureEvent interaction to handle events from the system hardware buttons, such as using the volume up button to capture a photo or holding it to start recording a video.

3. Security and Privacy:

   • The extension cannot use network resources, read from or write to any shared group container, or access shared preferences.
   • Use PhotoKit to save photo and video assets captured from your extension to the user's photo library, even when the device is locked.

4. Permissions:

   • Your extension will inherit permissions for camera and photos access from your application.
   • Ensure that your extension and application include privacy usage descriptions for the camera.

5. UI Consistency:

   • The UI for the extension should be focused on bringing users to a camera viewfinder to capture photos and videos, maintaining consistency with the main application.

For a more detailed walkthrough, you can refer to the session chapters:

• Introduction
• Great capture experiences
• Lifecycle of a capture extension
• Running on a locked device
• Capturing from the Lock Screen
• Working with captures in your app

Additionally, if you are interested in capturing spatial photo and video experiences, you can check out the session Build compelling spatial photo and video experiences, which covers the use of AVCaptureSession and other related APIs.