Swift Language Strings and Characters Uppercase and Lowercase Strings
Example
To make all the characters in a String uppercase or lowercase:
2.2
let text = "AaBbCc"
let uppercase = text.uppercaseString // "AABBCC"
let lowercase = text.lowercaseString // "aabbcc"
3.0
let text = "AaBbCc"
let uppercase = text.uppercased() // "AABBCC"
let lowercase = text.lowercased() // "aabbcc"
