用net匹配並替換iOS標準的emojiEmoji

標籤：

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespaceCommon{    public static class EmojiFilter    {        /**          * 檢測是否有emoji字元          * @param source          * @return 一旦含有就拋出          */        public static Boolean containsEmoji(String source)        {            char[] item = source.ToCharArray();            for (int i = 0; i < source.Length; i++)            {                if (isEmojiCharacter(item[i]))                    return true; //do nothing，判斷到了這裡表明，確認有表情字元            }            return false;        }        private static Boolean isEmojiCharacter(char codePoint)        {            return (codePoint == 0x0) ||                    (codePoint == 0x9) ||                    (codePoint == 0xA) ||                    (codePoint == 0xD) ||                    ((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||                    ((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) ||                    ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF));        }        /**         * 過濾emoji 或者 其他非文字類型的字元         * @param source         * @return         */        public static String filterEmoji(String source)        {            if (!containsEmoji(source))                return source;//如果不包含，直接返回            //到這裡鐵定包含            StringBuilder buf = null;            char[] item = source.ToCharArray();            for (int i = 0; i < source.Length; i++)            {                char codePoint = item[i];                if (isEmojiCharacter(codePoint))                {                    if (buf == null)                        buf = new StringBuilder(source.Length);                    buf.Append(codePoint);                }            }            if (buf == null)                return source;//如果沒有找到 emoji表情，則返回源字串            else            {                if (buf.Length == source.Length)                {                    buf = null;//這裡的意義在於儘可能少的toString，因為會重建字串                    return source;                }                else                    return buf.ToString();            }        }    }}

　　

用net匹配並替換iOS標準的emojiEmoji