该方法只能判断是否输入emoji表情，不能执行replace或提取具体表情符号
function isEmojiCharacter(substring) { for ( var i = 0; i < substring.length; i++) { var hs = substring.charCodeAt(i); if (0xd800 <= hs && hs <= 0xdbff) { if (substring.length > 1) { var ls = substring.charCodeAt(i + 1); var uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000; if (0x1d000 <= uc && uc <= 0x1f77f) { return true; } } } else if (substring.length > 1) { var ls = substring.charCodeAt(i + 1); if (ls == 0x20e3) { return true; } } else { if (0x2100 <= hs && hs <= 0x27ff) { return true; } else if (0x2B05 <= hs && hs <= 0x2b07) { return true; } else if (0x2934 <= hs && hs <= 0x2935) { return true; } else if (0x3297 <= hs && hs <= 0x3299) { return true; } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) { return true; } } } }
iOS输入框禁止输入emoji表情
