1 --[[ 2     @desc: 计算字符串字符个数 3     author:{author} 4     time:2017-12-29 16:08:11 5     --@inputstr: 源字符串 6     return 字符个数 7 ]] 8 function getStringCharCount(str) 9     local lenInByte = #str10     local charCount = 011     local i = 112     while (i <= lenInByte) 13     do14         local curByte = string.byte(str, i)15         local byteCount = 1;16         if curByte > 0 and curByte <= 127 then17             byteCount = 1                                               --1字节字符18         elseif curByte >= 192 and curByte < 223 then19             byteCount = 2                                               --双字节字符20         elseif curByte >= 224 and curByte < 239 then21             byteCount = 3                                               --汉字22         elseif curByte >= 240 and curByte <= 247 then23             byteCount = 4                                               --4字节字符24         end25         26         local char = string.sub(str, i, i + byteCount - 1)27         i = i + byteCount                                               -- 重置下一字节的索引28         charCount = charCount + 1                                       -- 字符的个数（长度）29     end30     return charCount31 end