Fetches the type description data source to provide the user with more information about the project extension category.
- macOS 10.14+
The category in which the user selected the extension.
An object used to invalidate information returned from the data source.
Extensions can define any number of project types to support. The types appear to users as choices in the Photos app upon initial project creation. To enable this entry point into the extension, include the key/value pair
YES in the Xcode project's
Info file. Once enabled, Photos asks your extension for its list of supported project types. The option the user selects is passed to the extension as an attribute of