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Editorial Team
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Asked: 2026-05-13T12:14:50+00:00

Could you give me some algorithm or example?

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Could you give me some algorithm or example?

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1 Answer

  1. Editorial Team

    NSUserDefaults will nicely hold onto snippets of data.

    Example: 

    - (void)applicationDidFinishLaunching:(UIApplication *)application {
    [window addSubview:tabBarController.view];
    if ([[NSUserDefaults standardUserDefaults] integerForKey:kTabIndexKey])
        tabBarController.selectedIndex = [[NSUserDefaults standardUserDefaults] integerForKey:kTabIndexKey];
}

- (void)applicationWillTerminate:(UIApplication *)application {
    [[NSUserDefaults standardUserDefaults] setInteger:tabBarController.selectedIndex forKey:kTabIndexKey];
}

    Persists and loads an integer (your method would be “setString” and “stringForKey”, check the docs.)

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