import Cocoa

//Swift define a string
let str = "A Quick Brown Fox Jumps Over The Lazy Dog"

//print the string
print(str)

//reverse the string word by word
let reversed = 
str.components(separatedBy: " ").reversed().joined(separator: " ")

//print the reversed string
print(reversed)

Output

A Quick Brown Fox Jumps Over The Lazy Dog

Dog Lazy The Over Jumps Fox Brown Quick A