swift中定義字符串:
var 變量名 = "hello"
var str = "Hello World"
便利字符串中的字符
var str = "三只小豬"
for c in str.characters
{
print(c)
}
字符串的長(zhǎng)度
//返回實(shí)際字符的個(gè)數(shù)
let length = str.characters.count
字符串拼接
兩個(gè)字符串直接相加
直接在" "使用\(變量名)的方式可以快速的拼接字符串
// 字符串拼接
let hello = "Hello"
let world = "World"
let z = "個(gè)贊"
let i = 32
let helloworld = hello + " " + world
//: "\()" 把其他類(lèi)型轉(zhuǎn)成字符串
let title = "\(i) " + z
