swift 字符串

来源：互联网发布：广州恒大淘宝队编辑：程序博客网时间：2024/06/08 20:03

利用 for-in 循环来遍历字符串中的每一个字符：

for character in "hello word!" {    println(character)}

使用countElements() 函数计算字符串长度

println(countElements("hello word!"))

使用hasPrefix 和 hasSuffix 方法来判断字符串的前缀和后缀是否相等

let romeoAndJuliet = [    "Act 1 Scene 1: Verona, A public place",    "Act 1 Scene 2: Capulet's mansion",    "Act 1 Scene 3: A room in Capulet's mansion",    "Act 1 Scene 4: A street outside Capulet's mansion",    "Act 1 Scene 5: The Great Hall in Capulet's mansion",    "Act 2 Scene 1: Outside Capulet's mansion",    "Act 2 Scene 2: Capulet's orchard",    "Act 2 Scene 3: Outside Friar Lawrence's cell",    "Act 2 Scene 4: A street in Verona",    "Act 2 Scene 5: Capulet's mansion",    "Act 2 Scene 6: Friar Lawrence's cell"]var act = 0var mansion = 0for scene in romeoAndJuliet {    if scene.hasPrefix("Act 1 ") {        ++act    }        if scene.hasSuffix("Capulet's mansion"){        ++mansion;    }}println("act: \(act)  sapuletMansion: \(mansion)");

使用 uppercaseString 和 lowercaseString 属性访问一个字符串的大、小写版本

let normal = "Could you help me, please?"println(normal.uppercaseString)println(normal.lowercaseString)////COULD YOU HELP ME, PLEASE?//could you help me, please?

0 0