ios 端如何解码 Unicode

Question

ios 端如何 进行同样的unicode 解码 转码， 不太懂Java，希望大神贴上ios unicode代码转码解码public static String string2Unicode(String string) {     StringBuffer unicode = new StringBuffer();    for (int i = 0; i < string.length(); i++) {        char c = string.charAt(i);        unicode.append("\\u" + Integer.toHexString(c));    }    String str = unicode.toString();      return str.replaceAll("\\\\","0x");}public static String unicode2String(String unicode) {        String str = unicode.replace("0x", "\\");                StringBuffer string = new StringBuffer();    String[] hex = str.split("\\\\u");    for (int i = 1; i < hex.length; i++) {        int data = Integer.parseInt(hex[i], 16);        string.append((char) data);    }    return string.toString();}