## Swift 字符串之Character和Unicode ### Character 字符串字符 #### 遍历字符串 　　调用字符串 `characters` 成员属性获取字符串的每个字符。 ``` var str = "Hello,playground" for c in str.characters{ print(c) } ``` #### 字符 Character ``` let englishChar: Character = "a" let chineseChar: Character = "中" let smile: Character = "��" let coolGuy: Character = "\u{1F60E}" // 一个酷脸的表情 ``` ### 字符串长度判断 ``` let str: String = "abcdefg" let str2: String = "\u{1F60E}\u{1F60E}\u{1F60E}" let str3: String = "中华人们共和国" str.characters.count // 7 str2.characters.count // 3 str3.characters.count // 7 var cafe = "cafe\u{0301}" cafe.characters.count // 4 ```