字符串表情判定 或指定出书汉字字符数字

/**
 *  判断字符串中是否存在 汉字 字母 数字
 * @param string 字符串
 * @return YES
 */
- (BOOL)hasEmoji:(NSString*)string;
{
    NSString *pattern = @"^[\u4E00-\u9FA5A-Za-z0-9]+$";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:string];
    return isMatch;
}
/// 是否含有表情Emoji
-(BOOL)isContainsEmoji:(NSString *)string {
    __block BOOL isEomji = NO;
    [string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:^(NSString * _Nullable substring, NSRange substringRange, NSRange enclosingRange, BOOL * _Nonnull stop) {   
        const unichar hs = [substring characterAtIndex:0];
        // surrogate pair
        if (0xd800 <= hs && hs <= 0xdbff) {
            if (substring.length > 1) {
                const unichar ls = [substring characterAtIndex:1];
                const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                if (0x1d000 <= uc && uc <= 0x1f77f) {
                    isEomji = YES;
                }
            }
        } else if (substring.length > 1) {
            const unichar ls = [substring characterAtIndex:1];
            if (ls == 0x20e3) {
                isEomji = YES;
            }         
        } else {
            // non surrogate
            if (0x2100 <= hs && hs <= 0x27ff && hs != 0x263b) {
                isEomji = YES;
            } else if (0x2B05 <= hs && hs <= 0x2b07) {
                isEomji = YES;
            } else if (0x2934 <= hs && hs <= 0x2935) {
                isEomji = YES;
            } else if (0x3297 <= hs && hs <= 0x3299) {
                isEomji = YES;
            } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50|| hs == 0x231a ) {
                isEomji = YES;
            }
        }
    }];
    return isEomji;
}