What is the best way to tokenize/split a NSString in Objective-C?
+39
A:
Found this at http://borkware.com/quickies/one?topic=NSString (useful link):
NSString *string = @"oop:ack:bork:greeble:ponies";
NSArray *chunks = [string componentsSeparatedByString: @":"];
Hope this helps!
Adam
Adam Alexander
2008-11-03 21:10:11
+9
A:
If you just want to split a string, use -[NSString componentsSeparatedByString:]. For more complex tokenization, use the NSScanner class.
Chris Hanson
2008-11-04 06:55:01
+2
A:
Hey ggarber, if your tokenization needs are more complex, check out my open source Cocoa String tokenizing/parsing toolkit: TDParseKit:
http://code.google.com/p/todparsekit/
For simple splitting of strings using a delimiter char (like ':'), TDParseKit would definitely be overkill. But again, for complex tokenization needs, TDParseKit is extremely powerful/flexible.
Todd Ditchendorf
2008-11-06 02:33:35
+5
A:
Everyone has mentioned componentsSeparatedByString: but you can also use CFStringTokenizer (remember that an NSString and CFString are interchangeable) which will tokenize natural languages too (like Chinese/Japanese which don't split words on spaces).
Matt Gallagher
2009-01-11 11:54:44
And, in Mac OS X 10.6 and later, NSString has methods `enumerateLinesUsingBlock:` and `enumerateSubstringsInRange:options:usingBlock:`, the latter of which is a block-based version of CFStringTokenizer. http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/instm/NSString/enumerateLinesUsingBlock: http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/instm/NSString/enumerateSubstringsInRange:options:usingBlock:
Peter Hosey
2010-02-03 23:08:26
A:
I then use objectAtIndex to get the "3rd word" in the sentence: @"oop:ack:bork:greeble:ponies"
Or is there a quicker way to do this all at once?
Bonnie
2010-02-03 21:48:06
You should ask that as a separate question, not in an answer on this question, since it doesn't answer this question.
Peter Hosey
2010-02-03 23:07:09
Not sure why anyone would want help to split up a string... but then do absolutely nothing with the individual words.
Bonnie
2010-02-05 05:48:58