将String转换为UnsafeMutablePointer <uint8> Swift

Question

有没有办法可以用Swift语言将String转换为UnsafeMutablePointer<UInt8>，避免数据丢失？

Answer 1

let s = "83"
var i: UInt8 = UInt8.init(s)!
let up: UnsafeMutablePointer<UInt8> = UnsafeMutablePointer<UInt8>.init(&i)