Generic Instance Method

transformPreference(_:_:)

Returns a view that applies callback(&value) to the value of preference Key that’s seen by its ancestors.

Declaration

func transformPreference<K>(_ key: K.Type = K.self, _ callback: @escaping (inout K.Value) -> Void) -> some View where K : PreferenceKey

See Also

Setting View Preferences

func preference<K>(key: K.Type, value: K.Value) -> View

Returns a view producing value as the value of preference Key seen by its ancestors.

Beta

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software