UniformTypeIdentifiers declares and queries Uniform Type Identifiers that describe the content types of files and in-memory data. You use UTType to identify a type, test its conformance to other types, and navigate the conformance hierarchy that relates content types to one another. UTTagClass distinguishes the tag namespaces—such as filename extensions and MIME types—that a type can be derived from or mapped to, and UTTypeReference represents a reference to a declared type.
Content Types 2
Types that declare a content type and let you query its conformance hierarchy.
- StUTTypeiOS 14.0+A structure representing a type in a type hierarchy.
- ClUTTypeReferenceiOS 14.0+\brief A class representing a type in a type hierarchy.
Tag Namespaces 1
Values that identify the tag namespaces a content type can map to or be derived from.
- StUTTagClassiOS 14.0+A type representing tag classes.
Extends 5
NSItemProviderNSStringNSURLURLResourceValuesURL