替换Swift中String中的所有字符

Question

试着玩Swift String。我想将String中的所有字符替换为空格。

inputString = "This is a String"

outputString = "                "

我怎么能在swift中实现这个目标？

Answer 1

一种可能的方式：

outputString = String(count: inputString.characters.count, repeatedValue: (" " as Character))

Answer 2

您可以使用map功能将任何字符替换为另一个字符：

String("foo".characters.map { _ in Character(" ") })

Answer 3

另一种方式：

let outputString = inputString.stringByReplacingOccurrencesOfString("[^\\s]",
                    withString: " ", 
                       options: .RegularExpressionSearch, 
                         range: Range(inputString.startIndex..<inputString.endIndex))

Answer 4

所以给定String个n个字符的输入String，您需要另外n个let inputString = "This is a String" let outputString = String([Character](count: inputString.characters.count, repeatedValue: " ")) 个空格，对吗？

Const FOF_CREATEPROGRESSDLG = &H0&

strTargetFolder = "\\computer\target"

Set objShell = CreateObject("Shell.Application")
Set objFolder = objShell.NameSpace(strTargetFolder)

objFolder.CopyHere "C:\tmp\copy\*.*", FOF_CREATEPROGRESSDLG