Type Property
key
iOS 26.0+
iPadOS 26.0+
Mac Catalyst 26.0+
macOS 26.0+
tvOS 26.0+
visionOS 26.0+
watchOS 26.0+
A unique identifier for this property type.
static var key: String { get }Return Value
A unique string identifier for this property type.
Discussion
The key should use reverse DNS style notation to ensure uniqueness across different frameworks and applications.