Emoji NSTextStorage
I am currently working on a custom NSTextStorage in iOS, I need to detect some hashtags (#), mentions and urls ... Everything is working fine at the moment, but if the user tries to enter an emoji char from the keyboard it doesn't show up because I I'm using the Helvetica font.
I am using regular expresión to detect hashtags, mentions and urls this way:
NSRegularExpression *iExpression = [NSRegularExpression regularExpressionWithPattern:pattern
options:0
error:NULL];
NSRange paragraphRange = [self.string paragraphRangeForRange: self.editedRange];
[iExpression enumerateMatchesInString:self.string
options:0
range:paragraphRange
usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop)
{
// Changing format of match
}
Where pattern
is a valid regex pattern to find hashtags, urls, or mentions.
Is there any pattern for detecting emoji symbols? what pattern should i use, i have tried this (and many others) [^\\x{1F601}-\\x{1F64F}\r\n]
with no success.
Thank.
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I'm not sure about the iOS regex patterns, but I'm pretty sure that while you are pointing to the correct range, you are excluding the character set rather than including using a carriage character ^
within the character set definition []
. Also I don't think you need to avoid those hex points and match CR and LF.
There is a complete Unicode table from Emoji composed of the corresponding Unicode dots here , which I have compiled in one expression below:
([0-9#][\x{20E3}])|[\x{00ae}|\x{00a9}|\x{203C}|\x{2047}|\x{2048}|\x{2049}|\x{3030}|\x{303D}|\x{2139}|\x{2122}|\x{3297}|\x{3299}][\x{FE00}-\x{FEFF}]?|[\x{2190}-\x{21FF}][\x{FE00}-\x{FEFF}]?|[\x{2300}-\x{23FF}][\x{FE00}-\x{FEFF}]?|[\x{2460}-\x{24FF}][\x{FE00}-\x{FEFF}]?|[\x{25A0}-\x{25FF}][\x{FE00}-\x{FEFF}]?|[\x{2600}-\x{27BF}][\x{FE00}-\x{FEFF}]?|[\x{2900}-\x{297F}][\x{FE00}-\x{FEFF}]?|[\x{2B00}-\x{2BF0}][\x{FE00}-\x{FEFF}]?|[\x{1F000}-\x{1F6FF}][\x{FE00}-\x{FEFF}]?
In PCRE color, adding a checkbox UTF-16
is a must, typing u
in the modifiers part to match Unicode characters, so it will be /ABOVE-EXPRESSION/u
, but unfortunately I don't know how this is done in your particular case.
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