ps：如果是因為服務(wù)器不支持Emoji，需要剔除Emoji的話，其實不用那么麻煩，把字符串內(nèi)容Unicode編碼一下就OK了，另附一個Unicode編碼/解碼

2019.7.1更新加上了matchesInStringWithRegex方法。

2020.9.10 增加Swift版

不廢話 上代碼，讓廣大碼農(nóng)來檢測。。。

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

OC版：

- (NSArray *)isContainsEmoji {
    
    NSMutableArray *array1 = [[NSMutableArray alloc] init];
    NSMutableArray *array2 = [[NSMutableArray alloc] init];
    
    NSRange range;
    NSString *emoji = @"aas d!`2完  全?無力????????????????????????????????????????????????????????????????????????????。。..~#$, 包括生僻字(??)";
    
    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) {
            
            //正則4個字節(jié)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:'%@', 字節(jié):'%ld'", string, length)];
            } else {
                [array2 addObject:MOStringWithFormat(@"字符串:'%@', 字節(jié):'%ld'", string, length)];
            }
        } else {
            [array2 addObject:MOStringWithFormat(@"字符串:'%@', 字節(jié):'%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:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'????', 字節(jié):'8'",
    "字符串:'????', 字節(jié):'8'",
    "字符串:'????', 字節(jié):'8'",
    "字符串:'????????', 字節(jié):'27'",
    "字符串:'????????', 字節(jié):'25'",
    "字符串:'??????', 字節(jié):'18'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'6'",
    "字符串:'????', 字節(jié):'8'",
    "字符串:'????', 字節(jié):'8'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:'??', 字節(jié):'4'",
), 
非Emoji>> (
    "字符串:'a', 字節(jié):'1'",
    "字符串:'a', 字節(jié):'1'",
    "字符串:'s', 字節(jié):'1'",
    "字符串:' ', 字節(jié):'1'",
    "字符串:'d', 字節(jié):'1'",
    "字符串:'!', 字節(jié):'1'",
    "字符串:'`', 字節(jié):'1'",
    "字符串:'2', 字節(jié):'1'",
    "字符串:'完', 字節(jié):'3'",
    "字符串:' ', 字節(jié):'1'",
    "字符串:' ', 字節(jié):'1'",
    "字符串:'全', 字節(jié):'3'",
    "字符串:'?', 字節(jié):'3'",
    "字符串:'無', 字節(jié):'3'",
    "字符串:'力', 字節(jié):'3'",
    "字符串:'。', 字節(jié):'3'",
    "字符串:'。', 字節(jié):'3'",
    "字符串:'.', 字節(jié):'1'",
    "字符串:'.', 字節(jié):'1'",
    "字符串:'~', 字節(jié):'1'",
    "字符串:'#', 字節(jié):'1'",
    "字符串:'$', 字節(jié):'1'",
    "字符串:',', 字節(jié):'1'",
    "字符串:' ', 字節(jié):'1'",
    "字符串:'包', 字節(jié):'3'",
    "字符串:'括', 字節(jié):'3'",
    "字符串:'生', 字節(jié):'3'",
    "字符串:'僻', 字節(jié):'3'",
    "字符串:'字', 字節(jié):'3'",
    "字符串:'(', 字節(jié):'1'",
    "字符串:'??', 字節(jié):'4'",
    "字符串:')', 字節(jié):'1'",
)
=======================================================

Swift版：

    /// 檢測是否包含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
    }

    /// 匹配正則表達(dá)式,并返回匹配結(jié)果
    /// - Parameter regex: 正則表達(dá)式
    /// - Returns: 匹配結(jié)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))
    }

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

該方法無需更新所謂的列表，可以無視后續(xù)增加emoji，一勞永逸。

媽媽再也不用擔(dān)心檢測不到emoji了?。。?/p>

歡迎吐槽！