个回答

• 只要我想

  2017-05-10 10:53:01

  在二维码编码前把字符串转换成UTF-8

  function utf16to8(str) {

      var out, i, len, c;

      out = "";

      len = str.length;

      for(i = 0; i < len; i++) {

  c = str.charCodeAt(i);

  if ((c >= 0x0001) && (c <= 0x007F)) {

     out += str.charAt(i);

  } else if (c > 0x07FF) {

     out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));

     out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));

     out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));

  } else {

     out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));

     out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));

  }

      }

      return out;

  }

  
  

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