Question

Im setting a value in viewDidLoad so it can be a default settings, so whenever I load into that view controller It will have a default value already.

Im using NSUserDefaults here:

- (void)viewDidLoad
{
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setInteger:1 forKey:@"defaultKey"];

    NSInteger defaultKey = [[NSUserDefaults standardUserDefaults] integerForKey:@"defaultKey"];

    if (defaultKey == 1){
    // do something 1
    } else if ( defaultKey == 2){
    // do something 2
    }
}

But what I wanted is when a button is pressed for example button2,

-(IBAction) button2Pressed:(id)sender {
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setInteger:2 forKey:@"defaultKey"];
}

it will change its value. So for example I load that ViewController again then

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setInteger:2 forKey:@"defaultKey"];

will be its setting the next it is loaded.

Answer 1

do like this

- (void)viewDidLoad
{


    NSInteger defaultKey = [[NSUserDefaults standardUserDefaults] integerForKey:@"defaultKey"];

    if (defaultKey == 1){
    // do something 1
    } else if ( defaultKey == 2){
    // do something 2
    }
   else 
   {
        //for the first time
          NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setInteger:1 forKey:@"defaultKey"];
   } 
}

and

-(IBAction) button2Pressed:(id)sender {
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setInteger:2 forKey:@"defaultKey"];
}