情景：
后台想通过cookie向客户端写入数据，安卓手机可以，但是ios就是不行，后来排查发现ios不能写入中文字符
Safari will not set cookies with non-ASCII characters in their value and other browsers can be unpredictable in how they display non-ASCII characters. As semi-colon is also not allowed in cookie values for any browser I would recommend using UrlEncode/UrlDecode.
意思就是非ASCII码的汉字，是不被认可的字符。那么只好对汉字进行了UrlEncode，读取的时候再来UrlDecode。