Check if there is an emoji contained in a string

Question

I am getting the text size of a string with this

textSize = [[tempDict valueForKeyPath:@\"caption.text\"] sizeWithFont:[UIFont systemFontOfSize:12] constrain         


        

Answer 1

it's too late reply into this but it's may help someone.

- (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];
         const unichar ls = substring.length > 1 ? [substring characterAtIndex:1] : 0;

#define IS_IN(val, min, max) (((val) >= (min)) && ((val) <= (max)))

         if(IS_IN(hs, 0xD800, 0xDBFF))
         {
             if(substring.length > 1)
             {
                 const int uc = ((hs - 0xD800) * 0x400) + (ls - 0xDC00) + 0x10000;

                 // Musical: [U+1D000, U+1D24F]
                 // Enclosed Alphanumeric Supplement: [U+1F100, U+1F1FF]
                 // Enclosed Ideographic Supplement: [U+1F200, U+1F2FF]
                 // Miscellaneous Symbols and Pictographs: [U+1F300, U+1F5FF]
                 // Supplemental Symbols and Pictographs: [U+1F900, U+1F9FF]
                 // Emoticons: [U+1F600, U+1F64F]
                 // Transport and Map Symbols: [U+1F680, U+1F6FF]
                 if(IS_IN(uc, 0x1D000, 0x1F9FF))
                     returnValue = YES;
             }
         }
         else if(substring.length > 1 && ls == 0x20E3)
         {
             // emojis for numbers: number + modifier ls = U+20E3
             returnValue = YES;
         }
         else
         {
             if(        // Latin-1 Supplement
                hs == 0x00A9 || hs == 0x00AE
                // General Punctuation
                ||  hs == 0x203C || hs == 0x2049
                // Letterlike Symbols
                ||  hs == 0x2122 || hs == 0x2139
                // Arrows
                ||  IS_IN(hs, 0x2194, 0x2199) || IS_IN(hs, 0x21A9, 0x21AA)
                // Miscellaneous Technical
                ||  IS_IN(hs, 0x231A, 0x231B) || IS_IN(hs, 0x23E9, 0x23F3) || IS_IN(hs, 0x23F8, 0x23FA) || hs == 0x2328 || hs == 0x23CF
                // Geometric Shapes
                ||  IS_IN(hs, 0x25AA, 0x25AB) || IS_IN(hs, 0x25FB, 0x25FE) || hs == 0x25B6 || hs == 0x25C0
                // Miscellaneous Symbols
                ||  IS_IN(hs, 0x2600, 0x2604) || IS_IN(hs, 0x2614, 0x2615) || IS_IN(hs, 0x2622, 0x2623) || IS_IN(hs, 0x262E, 0x262F)
                ||  IS_IN(hs, 0x2638, 0x263A) || IS_IN(hs, 0x2648, 0x2653) || IS_IN(hs, 0x2665, 0x2666) || IS_IN(hs, 0x2692, 0x2694)
                ||  IS_IN(hs, 0x2696, 0x2697) || IS_IN(hs, 0x269B, 0x269C) || IS_IN(hs, 0x26A0, 0x26A1) || IS_IN(hs, 0x26AA, 0x26AB)
                ||  IS_IN(hs, 0x26B0, 0x26B1) || IS_IN(hs, 0x26BD, 0x26BE) || IS_IN(hs, 0x26C4, 0x26C5) || IS_IN(hs, 0x26CE, 0x26CF)
                ||  IS_IN(hs, 0x26D3, 0x26D4) || IS_IN(hs, 0x26D3, 0x26D4) || IS_IN(hs, 0x26E9, 0x26EA) || IS_IN(hs, 0x26F0, 0x26F5)
                ||  IS_IN(hs, 0x26F7, 0x26FA)
                ||  hs == 0x260E || hs == 0x2611 || hs == 0x2618 || hs == 0x261D || hs == 0x2620 || hs == 0x2626 || hs == 0x262A
                ||  hs == 0x2660 || hs == 0x2663 || hs == 0x2668 || hs == 0x267B || hs == 0x267F || hs == 0x2699 || hs == 0x26C8
                ||  hs == 0x26D1 || hs == 0x26FD
                // Dingbats
                ||  IS_IN(hs, 0x2708, 0x270D) || IS_IN(hs, 0x2733, 0x2734) || IS_IN(hs, 0x2753, 0x2755)
                ||  IS_IN(hs, 0x2763, 0x2764) || IS_IN(hs, 0x2795, 0x2797)
                ||  hs == 0x2702 || hs == 0x2705 || hs == 0x270F || hs == 0x2712 || hs == 0x2714 || hs == 0x2716 || hs == 0x271D
                ||  hs == 0x2721 || hs == 0x2728 || hs == 0x2744 || hs == 0x2747 || hs == 0x274C || hs == 0x274E || hs == 0x2757
                ||  hs == 0x27A1 || hs == 0x27B0 || hs == 0x27BF
                // CJK Symbols and Punctuation
                ||  hs == 0x3030 || hs == 0x303D
                // Enclosed CJK Letters and Months
                ||  hs == 0x3297 || hs == 0x3299
                // Supplemental Arrows-B
                ||  IS_IN(hs, 0x2934, 0x2935)
                // Miscellaneous Symbols and Arrows
                ||  IS_IN(hs, 0x2B05, 0x2B07) || IS_IN(hs, 0x2B1B, 0x2B1C) || hs == 0x2B50 || hs == 0x2B55
                )
             {
                 returnValue = YES;
             }
         }

#undef IS_IN
     }];

    return returnValue;
}