Swift .uppercaseString or .lowercaseString property replacement

Question

Since Strings in Swift no longer have the .uppercaseString or .lowercaseString properties available, how would i go about performing that function?

If i have for example

Answer 1

The uppercaseString and lowercaseString properties on String are not in the Swift standard library anymore. Instead, Foundation provides them now. So you have to

import Foundation

to use it.