## Swift 字符串之Character和Unicode ### Character 字符串字符 #### 遍歷字符串 　　調用字符串 `characters` 成員屬性獲取字符串的每個字符。 ``` 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}" // 一個酷臉的表情 ``` ### 字符串長度判斷 ``` let str: String = "abcdefg" let str2: String = "\u{1F60E}\u{1F60E}\u{1F60E}" let str3: String = "中華人們共和國" str.characters.count // 7 str2.characters.count // 3 str3.characters.count // 7 var cafe = "cafe\u{0301}" cafe.characters.count // 4 ```