Find hashtag words in an NSString using NSPredicate

HashtagFiltering.m

//A code snippet, that can be used to search for hashtags in a given NSString

//Instantiate a mutable array containing all the words. We sepparate the original string into words.
NSMutableArray *hashtagWordsArray = [NSMutableArray arrayWithArray:[<An NSString> componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
NSPredicate *hashtagDetectionPredicate = [NSPredicate predicateWithFormat:@"SELF BEGINSWITH %@", @"#"];
[hashtagWordsArray filterUsingPredicate:hashtagDetectionPredicate];

//Log the result
NSLog(@"Hashtags: %@", hashtagWordsArray);