- (BOOL)hasEmoji:(NSString*)string{    NSString *pattern = @"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]";    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];    BOOL isMatch = [pred evaluateWithObject:string];    return isMatch;    }/** * 判断字符串中是否存在emoji * @param string 字符串 * @return YES(含有表情) */- (BOOL)stringContainsEmoji:(NSString *)string{    __block BOOL returnValue = NO;    [string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock: ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *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) {                    returnValue = YES;                }            }        } else if (substring.length > 1) {            const unichar ls = [substring characterAtIndex:1];            if (ls == 0x20e3) {                returnValue = YES;            }        } else {            // non surrogate            if (0x2100 <= hs && hs <= 0x27ff) {                returnValue = YES;            } else if (0x2B05 <= hs && hs <= 0x2b07) {                returnValue = YES;            } else if (0x2934 <= hs && hs <= 0x2935) {                returnValue = YES;            } else if (0x3297 <= hs && hs <= 0x3299) {                returnValue = YES;            } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {                returnValue = YES;            }        }    }];    return returnValue;    }