CGImageMetadataTagCopyPrefix(_:)
Returns an immutable copy of the tag’s prefix.
Declaration
func CGImageMetadataTagCopyPrefix(_ tag: CGImageMetadataTag) -> CFString?Parameters
- tag:
The metadata tag from which to fetch the namespace information.
Return Value
An immutable string that contains the tag’s prefix. For example, EXIF metadata uses the prefix exif. You are responsible for releasing this string.