let aString = "这是一个测试字符串。" // 首先,反转字符串的字符 let reversedCharacters = aString.characters.reverse() // 然后使用String()初始化程序转换回String let reversedString = String(reversedCharacters) print(reversedString) // ".gnirts tset a si sihT"
let reversedCharacters = aString.characters.reversed() let reversedString = String(reversedCharacters)