Comma-separated string to NSArray in Objective-C
Assuming there's no worry about escaping/unescaping commas contained within the strings, it should be this simple:
NSArray *items = [theString componentsSeparatedByString:@","];
Objective-C
NSString *list = @"Karin, Carrie, David";NSArray *listItems = [list componentsSeparatedByString:@", "];