Swift字符串类型

时间：2014-06-18 14:28:49 阅读：146 评论：0 收藏：0 [点我收藏+]

字符串初始化

1、初始化

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let someString = "Some string literalvalue"
let wiseWords = "\"Imagination is moreimportant than knowledge\" -Einstein" let dollarSign = "\x24" // $,
Unicodescalar U+0024
let blackHeart = "\u2665" // ♥,
Unicodescalar U+2665
let sparklingHeart = "\U0001F496" //
, Unicode scalarU+1F496

2、空值

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3、空值判断

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字符串修改

var 声明的可以修改，let 不能修改。

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字符串插入

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字符串长度

使用 countElements函数。

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let unusualMenagerie = "Koala , Snail, Penguin,Dromedary" println("unusualMenagerie has
\(countElements(unusualMenagerie))
characters")

比较字符串相等

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let quotation = "We‘re a lot alike, you and I."let sameQuotation = "We‘re a lot alike, youand I."
if quotation == sameQuotation {
println("These two strings areconsidered equal")
}

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原文地址：http://www.cnblogs.com/iOS-Blog/p/3791460.html

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