There are many parser available you can google it. As oehman mention CHCSVParser is good to parse CSV files. Here is a blog which explains how to use it :-
http://www.theappguruz.com/tutorial/ios-csv-parser-writer/
This answer will help you too :-
https://stackoverflow.com/a/14537119/1865424
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solved Reading/Writing xls/csv files in objective C [closed]