banDedo banDedo - 1 year ago 251
Swift Question

How do you convert a String to a CString in the Swift Language?

I am trying to use dispatch_queue_create with a dynamic String that I am creating at runtime as the first parameter. The compiler complains because it expects a standard c string. If I switch this to a compile time defined string the error goes away. Can anyone tell me how to convert a String to a standard c string?

Answer Source

You can get a CString as follows:

import Foundation

var str = "Hello, World"

var cstr = str.bridgeToObjectiveC().UTF8String

EDIT: Beta 5 Update - bridgeToObjectiveC() no longer exists (thanks @Sam):

var cstr = (str as NSString).UTF8String
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