Rename a file

 Problem

I have a file and want to rename it.

 Recipe

// Create a FileManager instance

let fileManager = NSFileManager.defaultManager()

// Rename 'hello.swift' as 'goodbye.swift'

do {
    try fileManager.moveItemAtPath("hello.swift", toPath: "goodbye.swift")
}
catch let error as NSError {
    print("Ooops! Something went wrong: \(error)")
}