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copied!<p>Wain is right but I think as you want to store small amount of data for further use, the most efficient ways is to use <code>NSUserDefault</code>.</p> <p><code>NSUserDefault</code> stores data in <code>NSDictionary</code> type things.</p> <p>I think this is the step you have to take:</p> <p>1- check if data exists. I mean if user selected the number if the last run of your app. So in <code>viewDidLoad</code> method:</p> <pre><code>NSMutableDictionary *userDefaultDataDictionary = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:ALL_DATA_KEY] mutableCopy]; if (userDefaultDataDictionary) { // so the dictionary exists, which means user has entered the number in previous app run // and you can read it from the NSDictionaty: if(userDefaultDataDictionary[LABLE_KEY]){ //and store it } } </code></pre> <p>2 - you can implement some method like <code>syncronize</code> to store data in <code>NSUserDefault</code> every time something has been changed.</p> <pre><code>- (void) synchronize { NSMutableDictionary *dictionaryForUserDefault = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:ALL_DATA_KEY] mutableCopy]; if(!dictionaryForUserDefault) dictionaryForUserDefault = [[NSMutableDictionary alloc] init]; dictionaryForUserDefault[LABLE_KEY] = //data you want to store [[NSUserDefaults standardUserDefaults] setObject:dictionaryForUserDefault forKey:ALL_DATA_KEY]; [[NSUserDefaults standardUserDefaults] synchronize]; } </code></pre> <p>P.S. and don't forget to <code>#define</code> your keys for your dictionary:</p> <pre><code>#define LABLE_KEY @"Lables" #define ALL_DATA_KEY @"AllData" </code></pre>

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