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copied!<p><a href="https://stackoverflow.com/questions/4075056/saving-data-in-ios">This answer</a> might help you. Using Core Data might be overkill here, and saving to a plist is extremely easy. This is Benoît's answer from the linked question:</p> <pre><code>NSString *error; NSString *rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *plistPath = [rootPath stringByAppendingPathComponent:@"yourFile.plist"]; NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:rootObj format:NSPropertyListXMLFormat_v1_0 errorDescription:&error]; if(plistData) { [plistData writeToFile:plistPath atomically:YES]; } else { NSLog(@"Error : %@",error); [error release]; } </code></pre> <p>where <code>rootObj</code> is the object you wish to serialize, in this case, your array/dictionary. </p> <hr> <p>Also, if you are going to be read/writing to this data frequently during the course of your app, using a <a href="https://stackoverflow.com/questions/145154/what-does-your-objective-c-singleton-look-like">singleton</a> which can make a <em>huge</em> difference performance-wise instead of constantly reading/writing from/to a file. You can load all of your data into the singleton on app-launch and save it upon <code>applicationWillTerminate</code>.</p> <p>To answer your array/dictionary question, it depends on how you are obtaining your strings and how you want them to be ordered. Sorting an array is extremely easy, as you can see in <a href="https://stackoverflow.com/questions/1351182/how-to-sort-a-nsarray-alphabetically">this</a> answer.</p>

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