photos app extension iOS

To create a photos app extension for iOS, you can leverage the new "locked camera capture extension" introduced in the session Build a great Lock Screen camera capture experience at WWDC 2024. This extension allows users to capture photos and videos directly from the lock screen using the same familiar UI from your application.

Here are some key points from the session:

Lifecycle of a Capture Extension:
- The extension can be launched from the control center, action button, or lock screen.
- It allows users to capture photos and videos, which can be added directly to the photo library or stored in a provided directory on the file system.
- The extension inherits camera and photo permissions from your app.
Handling Permissions:
- The extension should be prepared to handle any level of permissions for both camera and photo library access.
- If additional permissions are needed, the extension can transition into the parent application to request them.
Using Photokit:
- Photokit can be used to save photo and video assets captured from the extension, even when the device is locked.
- Photokit supports granular levels of photo library access, such as write-only access and limited library support.
Persisting Data:
- Captured content can be written to a provided session content directory.
- Once the extension is dismissed, the session content directory is migrated to the application's container, and the extension's container is erased.
Working with Captures in Your App:
- The locked camera capture manager can be used to work with the content captured from the extension.
- The manager provides a session content URL's property and an async sequence of session content updates.

For more detailed information, you can refer to the specific chapters in the session:

These chapters will guide you through the process of building and integrating a photos app extension for iOS.