ps：如果是因为服务器不支持Emoji，需要剔除Emoji的话，其实不用那么麻烦，把字符串内容Unicode编码一下就OK了，另附一个Unicode编码/解码

2019.7.1更新加上了matchesInStringWithRegex方法。

2020.9.10 增加Swift版

不废话 上代码，让广大码农来检测。。。

=======================================================

OC版：

- (NSArray *)isContainsEmoji {
    
    NSMutableArray *array1 = [[NSMutableArray alloc] init];
    NSMutableArray *array2 = [[NSMutableArray alloc] init];
    
    NSRange range;
    NSString *emoji = @"aas d!`2完  全䴎无力😀😃😄😁😆🤩🥳😏😒😞👌🏿🤘🏻👆🏾👩❤️💋👩👩👩👦👦👩👩👧🌴🌳⚽️🇧🇬🇧🇧🔯📞🚨🏸。。..~#$, 包括生僻字(𤋮)";
    
    for (int i = 0; i < emoji.length; i += range.length) {
        
        range = [emoji rangeOfComposedCharacterSequenceAtIndex:i];
        NSString *string = [emoji substringWithRange:range];
        NSUInteger length = [string lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
        
        if (length >= 4) {
            
            //正则4个字节或以上的生僻字、其他字符集
            NSString *regex = @"[\\uD840\\uDC00-\\uD87A\\uDFEF]";
            NSArray *matches = [string matchesInStringWithRegex:regex];
            
            if (!matches.count) {
                [array1 addObject:MOStringWithFormat(@"字符串:'%@', 字节:'%ld'", string, length)];
            } else {
                [array2 addObject:MOStringWithFormat(@"字符串:'%@', 字节:'%ld'", string, length)];
            }
        } else {
            [array2 addObject:MOStringWithFormat(@"字符串:'%@', 字节:'%ld'", string, length)];
        }
    }
    
    NSLog(@"Emoji>> %@, \n非Emoji>> %@", array1, array2);
    
    return array1;
}

- (NSArray<NSTextCheckingResult *> *)matchesInStringWithRegex:(NSString *)regex {
    
    NSString *string = [NSString stringWithString:self];
    
    NSRegularExpression *regular = [NSRegularExpression regularExpressionWithPattern:regex options:NSRegularExpressionCaseInsensitive error:nil];
    
    NSArray *matches = [regular matchesInString:string options:NSMatchingReportCompletion range:NSMakeRange(0, string.length)];
    
    if (!matches.count) {
        return nil;
    }
    
    return matches;
}

=======================================================

log:

Emoji>> (
    "字符串:'😀', 字节:'4'",
    "字符串:'😃', 字节:'4'",
    "字符串:'😄', 字节:'4'",
    "字符串:'😁', 字节:'4'",
    "字符串:'😆', 字节:'4'",
    "字符串:'🤩', 字节:'4'",
    "字符串:'🥳', 字节:'4'",
    "字符串:'😏', 字节:'4'",
    "字符串:'😒', 字节:'4'",
    "字符串:'😞', 字节:'4'",
    "字符串:'👌🏿', 字节:'8'",
    "字符串:'🤘🏻', 字节:'8'",
    "字符串:'👆🏾', 字节:'8'",
    "字符串:'👩❤️💋👩', 字节:'27'",
    "字符串:'👩👩👦👦', 字节:'25'",
    "字符串:'👩👩👧', 字节:'18'",
    "字符串:'🌴', 字节:'4'",
    "字符串:'🌳', 字节:'4'",
    "字符串:'⚽️', 字节:'6'",
    "字符串:'🇧🇬', 字节:'8'",
    "字符串:'🇧🇧', 字节:'8'",
    "字符串:'🔯', 字节:'4'",
    "字符串:'📞', 字节:'4'",
    "字符串:'🚨', 字节:'4'",
    "字符串:'🏸', 字节:'4'",
), 
非Emoji>> (
    "字符串:'a', 字节:'1'",
    "字符串:'a', 字节:'1'",
    "字符串:'s', 字节:'1'",
    "字符串:' ', 字节:'1'",
    "字符串:'d', 字节:'1'",
    "字符串:'!', 字节:'1'",
    "字符串:'`', 字节:'1'",
    "字符串:'2', 字节:'1'",
    "字符串:'完', 字节:'3'",
    "字符串:' ', 字节:'1'",
    "字符串:' ', 字节:'1'",
    "字符串:'全', 字节:'3'",
    "字符串:'䴎', 字节:'3'",
    "字符串:'无', 字节:'3'",
    "字符串:'力', 字节:'3'",
    "字符串:'。', 字节:'3'",
    "字符串:'。', 字节:'3'",
    "字符串:'.', 字节:'1'",
    "字符串:'.', 字节:'1'",
    "字符串:'~', 字节:'1'",
    "字符串:'#', 字节:'1'",
    "字符串:'$', 字节:'1'",
    "字符串:',', 字节:'1'",
    "字符串:' ', 字节:'1'",
    "字符串:'包', 字节:'3'",
    "字符串:'括', 字节:'3'",
    "字符串:'生', 字节:'3'",
    "字符串:'僻', 字节:'3'",
    "字符串:'字', 字节:'3'",
    "字符串:'(', 字节:'1'",
    "字符串:'𤋮', 字节:'4'",
    "字符串:')', 字节:'1'",
)
=======================================================

Swift版：

    /// 检测是否包含Emoji表情
    var isContainsEmoji: Bool {
        for char in self {
            let str = String(char)
            if str.lengthOfBytes(using: .utf8) >= 4 {
                if str.matches("[\\uD840\\uDC00-\\uD87A\\uDFEF]").isEmpty {
                    return true
                }
            }
        }
        return false
    }

    /// 匹配正则表达式,并返回匹配结果
    /// - Parameter regex: 正则表达式
    /// - Returns: 匹配结果
    func matches(_ regex: String) -> [NSTextCheckingResult] {
        guard let regular = try? NSRegularExpression(pattern: regex, options: .caseInsensitive) else {
            return []
        }
        return regular.matches(in: self, options: .reportCompletion, range: NSRange(location: 0, length: count))
    }

=======================================================

该方法无需更新所谓的列表，可以无视后续增加emoji，一劳永逸。

妈妈再也不用担心检测不到emoji了！！！

欢迎吐槽！