IDEmojiString is a simple tool to detect emoji in string, and also remove emoji from string.
IDEmojiString detects an emoji by search through full emoji set loaded from emoji.plist. Emoji.plist extracted from http://unicode.org/Public/emoji/4.0/emoji-test.txt, which is the best definition of the full set indicated in http://www.unicode.org/reports/tr51/#Identification.
NSString's existing method - (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)searchSet; only supports character set in BMP, not supplementary characters. For example:
NSMutableCharacterSet *set = [[NSMutableCharacterSet alloc] init];
[set addCharactersInString:@"2️⃣"]; // keycap 2, 0032 FE0F 20E3, github seems not supporting this emoji. Check from http://www.iemoji.com/view/emoji/296/symbols/keycap-2
[@"2" rangeOfCharacterFromSet:set]; // return value: YES, which is not reasonable
Existing library does not solve emoji perfectly. NSString+RemoveEmoji category, which quoted by many articles, does not detect emoji such as @"⭐", and detects character such as @"Ⅶ" which is not emoji. Test here
#import "IDEmojiManager.h"
IDEmojiManager *manager = [[IDEmojiManager alloc] init];
BOOL containsEmoji = [manager containEmojiInString:@"Some String⭐"]; // return value: YES
NSString *str = [manager removeEmojiFromString:@"Some String⭐"]; // return value: Some String
Use CocoaPods.
pod 'IDEmojiString'If you found a bug, open an issue.
IDEmojiString is released under the MIT license. See LICENSE for details.