Save the current status when quit, auto-reload when re-open the app

Question

I\'m creating a simple app to simply save a person\'s name and a number associated with this person. I\'ve created a class for person like this:

@interface P         


        

Answer 1

You want to save to NSUserDefaults (documentation). Look at the UserDefaults example in the documentation.

Also check out this question:

How to register user defaults using NSUserDefaults without overwriting existing values?

Answer 2

Easy to do with NSUserDefaults, here's some code to get you started:

- (void)applicationDidFinishLaunching:(UIApplication *)application {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    appDelegate.lastPerson.name = [defaults stringForKey:@"Name"];
    appDelegate.lastPerson.serial = [defaults stringForKey:@"Serial"];

    [window addSubview:[flipViewController view]];
    [window makeKeyAndVisible];
}

-(void)applicationWillTerminate:(UIApplication *)application {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setString:appDelegate.lastPerson.name forKey:@"Name"];
    [defaults setString:appDelegate.lastPerson.serial forKey:@"Serial"];
    [defaults synchronize];     
}

You can check if either of the strings are nil after loading which will indicate no stored value and you should then ask the user for input.