How to convert String to UnsafePointer and length

Question

When I using NSOutputStream\'s write method

func write(_ buffer: UnsafePointer, maxLength length: Int) -> Int
         


        

Answer 1

An answer for people working in Swift 4 now. You can no longer get bytes from a Data object, you have to copy them into an UnsafeMutablePointer

let helloWorld = "Hello World!"

let data = helloWorld.data(using: String.Encoding.utf8, allowLossyConversion: false)!
var dataMutablePointer = UnsafeMutablePointer.allocate(capacity: data.count)

//Copies the bytes to the Mutable Pointer
data.copyBytes(to: dataMutablePointer, count: data.count)

//Cast to regular UnsafePointer
let dataPointer = UnsafePointer(dataMutablePointer)

//Your stream
oStream.write(dataPointer, maxLength: data.count)