PHP explode(", " , "One, Two, Three");

Objective-C NSArray *listItems = [@"One, Two, Three" componentsSeparatedByString:@", "];

[myArray sortUsingSelector:@selector(caseInsensitiveCompare:)];

NSArray Class Reference -> sortedArrayUsingSelector

or:

[myArray sortUsingSelector:@selector(localizedCaseInsensitiveCompare:)];