iOS字符串中是否包含emoji表情

- (BOOL)stringContainsEmoji:(NSString *)string

{

__block BOOL returnValue = 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 <= 0x1f918)

{

returnValue = YES;

}

}

}

else if (substring.length > 1)

{

const unichar ls = [substring characterAtIndex:1];

if (ls == 0x20e3 || ls == 0xFE0F || ls == 0xd83c)

{

returnValue = YES;

}

}

else

{

// non surrogate

if (0x2100 <= hs && hs <= 0x27ff)

{

if (0x278b <= hs && 0x2792 >= hs)

{

returnValue = NO;

}

else

{

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 || hs == 0xd83e)

{

returnValue = YES;

}

}

}];

return returnValue;

}