Instance Method

containsTraits(in:)

Returns a Boolean value that indicates whether a trait collection contains all of another trait collection’s values.

Declaration

func containsTraits(in trait: UITraitCollection?) -> Bool

Parameters

trait

A trait collection that you want to compare to the receiver trait collection.

Return Value

This method returns true if the receiver contains all of the trait values in the trait collection passed in the trait parameter, and returns false otherwise.

Discussion

Use this method to compare two standalone trait collections, or to compare the iOS interface environment’s trait collection to a standalone trait collection.