How to convert String to byte in Swift？

How to convert String to byte in Swift？ Like String .getBytes()in Java.

Solution 1:

There is a more elegant way.

Swift 3:

let str = "Hello"
let buf = [UInt8](str.utf8)

Swift 4: (thanks to @PJ_Finnegan)

let str = "Hello"
let buf: [UInt8] = Array(str.utf8)

You can iterate through the UTF8 code points and create an array:

var str = "hello, world"
var byteArray = [Byte]()
for char in str.utf8{
    byteArray += [char]
}
println(byteArray)