CVAttachmentValueRepresentable

protocol · iOS 27.0+ · SDK 27.1

protocol CVAttachmentValueRepresentable

Allows Swift types to be used as buffer attachment value. A type conforming to this protocol can be used as value for an attachment key. The ``CVAttachmentRawValue`` type facilitates conversion to and from raw attachment values. Conformances of standard Swift type to this protocol are provided in CoreVideo framework. Implementing this protocol for a custom struct is as simple as: ```swift struct MyStruct { var number: Int var tags: [String] } extension MyStruct: CVAttachmentValueRepresentable { static func makeFromRawAttachmentValue(_ repr: CVAttachmentRawValue) -> Self? { guard let number: Int = repr["number"], tags: [String] = repr["tags"] else { return nil } return .init(number: number, tags: tags) } var rawAttachmentValueRepresentation: CVAttachmentRawValue { ["number": self.number, "tags": self.tags] } } ``` Default implementation is provided for ``RawRepresentable`` protocol where RawValue conforms to this protocol. This allow enumeration with raw values to conform to ``CVAttachmentValueRepresentable`` protocol without a custom implementation.

Members (0)

This type has no directly callable members in this snapshot. See the framework’s skipped declarations for unsupported APIs.

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