emoji

1.Mysql中文存储乱码 默认编码latin1,需修改my.conf重启服务 character-set-server = utf8 collation-server=utf8_general_ci 设置是否成功，可用以下命令查看： SHOW VARIABLES LIKE 'character_set_%' SHOW VARIABLES LIKE 'collation_%' 2.Mysql emoji表情数据存储异常 使用Emoji表情时应注意，普通UTF-8为3字节unicode，而Emoji表情符号是4字节unicode，因此UTF8编码无法存储Emoji，此时需将Mysql服务端编码改为utf8mb4(Mysql5.5.3以上版本支持) character-set-server = utf8mb4 column字段编码修改方法： ALTER TABLE tablename CHANGE column_name VARCHAR(100) CHARACTER SET utf8mb4; 3.Mysql启动错误:Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist. 解决方法,在mysql的安装时设置datadir与用户目录读写权限 ./scripts/mysql

Please help me understand how multibyte characters like emoji's are handled in MySQL utf8mb4 fields. See below for a simple test SQL to illustrate the challenges. /* Clear Previous Test */ DROP TABLE IF EXISTS `emoji_test`; DROP TABLE IF EXISTS `emoji_test_with_unique_key`; /* Build Schema */ CREATE TABLE `emoji_test` ( `id` int(11) NOT NULL AUTO_INCREMENT, `string` varchar(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '', `status` tinyint(1) NOT NULL DEFAULT '1', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4; CREATE TABLE `emoji_test_with_unique_key` (

I want to use Emojis in my app's strings. All strings reside, of course, in strings.xml The problem is that not all Emojis are 16 bit friendly. Some Emojis can be represented as "normal" 16 bit hex: '\u26FF' but some are 32 bit hexes (UTF-16), usually represented as: '\x1F600' . I have no problem dealing with those inside the app, in code. But the strings.xml resource file is UTF8 encoded, and does not deal properly with non 16 bit escape chars. I tried using '\x1F600' - because I saw that '\u26FF' works just fine. But it seems not to devour the 'x' escape char. Nor did it like the regexp

Right now I'm using this piece of code : public static bool ContainsEmoji(this string text) { Regex rgx = new Regex(@"\p{Cs}"); return rgx.IsMatch(text); } And it's being somewhat helpful. Most of them appear to be detected, but some aren't. Here's a reference list to help : http://unicode.org/emoji/charts/full-emoji-list.html All the smiley faces appear to be fine, but these specific emojis do not get caught by the Regex : 1920 U+2614 ☔ umbrella with rain drops 1921 U+26F1 ⛱ umbrella on ground 1922 U+26A1 ⚡ high voltage 1923 U+2744 ❄ snowflake On the keyboard these are not close to each other

Is there some way to detect when the user changes keyboard types, specifically to the Emoji keyboard in this case? You can use UITextInputMode to detect the current language of the currentInputMode -- emoji is considered a language. From the docs : An instance of the UITextInputMode class represents the current text-input mode. You can use this object to determine the primary language currently being used for text input. You can test for the emoji keyboard like this: NSString *language = [[UITextInputMode currentInputMode] primaryLanguage]; BOOL isEmoji = [language isEqualToString:@"emoji"];