CGImageMetadataTagCopyValue(_:)
Returns a shallow copy of the tag’s value, which is suitable only for reading.
Declaration
func CGImageMetadataTagCopyValue(_ tag: CGImageMetadataTag) -> CFTypeRef?Parameters
- tag:
The metadata tag from which to fetch the namespace information.
Return Value
A copy of the tag’s value. Possible return types are CFString, CFNumber, CFBoolean, CFArray, and CFDictionary.
Discussion
Use this method to obtain the value when you want to use or display that value elsewhere. Any changes you make to the returned value don’t change the contents of the metadata tag. To change the value, call CGImageMetadataSetValueWithPath(_:_:_:_:) or CGImageMetadataSetTagWithPath(_:_:_:_:) instead.