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

try this code:

- (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;
}

Answer 2

@Simha.IC answer is great.

However it does not work with the new iOS 9.1 emojis'.

Simha.IC snippet is not detecting these ones:

Answer 3

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;
}

Answer 4

Please, see this answer How to get NSString size when NSString includes emojis?

If you have only emojis then you shouldn't use sizeWithFont. Use label for it or something else.

NSString doesn't work with Emojis, only text. If you have emojis, then you should use [label sizeToFit] or [label sizeThatFits:]

Also, you can use this code:

 id text = [tempDict valueForKeyPath:@"caption.text"]

 if (![text isKindOfClass:[NSNull class]]) {
 ...
 }

Because, you get NSNull from dictionary, but it doesn't equal nil, and your condition works.

Answer 5

You can use this new framework

https://github.com/woxtu/NSString-RemoveEmoji

Usage:

if (string.isIncludingEmoji) 
{
   NSLog(@"String Contains Emoji");
}

else
{
  NSLog(@"String Doesn't Contains Emoji");
}