Search pattern in string using regex in obj-c
- by manileo86
I'm working on a string pattern match algorithm. I use NSRegularExpression for finding the matches. For ex: I've to find all words starting with '#' in a string..
Currently I use the following regex function:
static NSRegularExpression *_searchTagRegularExpression;
static inline NSRegularExpression * SearchTagRegularExpression()
{
if (!_searchTagRegularExpression)
{
_searchTagRegularExpression = [[NSRegularExpression alloc]
initWithPattern:@"(?<!\\w)#([\\w\\._-]+)?
options:NSRegularExpressionCaseInsensitive error:nil];
}
return _searchTagRegularExpression;
}
and I use it as below:
NSRegularExpression *regexp = SearchTagRegularExpression();
[regexp enumerateMatchesInString:searchString
options:0 range:stringRange
usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop)
{
// comes here for every match with range
}];
This works properly. But i just want to know if this is the best way. suggest if there's any better alternative...
