Hello all, I have saved data which was saved using NSUserDefaults. I was under the impression that if there was nothing saved to the key already (first time app is run) it would default to 0. This however doesn't seem to be the case.

Here is what I have:

To save:

- (void)viewWillDisappear:(BOOL)animated
{
[[NSUserDefaults standardUserDefaults] setInteger:setbatteryHealthCalculated     forKey:@"healthValue"];

    [[NSUserDefaults standardUserDefaults] synchronize];

}

To load:

- (void) viewWillAppear:(BOOL)animated
{
NSInteger setbatteryHealthCalculated = [[NSUserDefaults standardUserDefaults]     integerForKey:@"healthValue"];
}

To check for save value:

- (IBAction)check{

    NSInteger setbatteryHealthCalculated = [[NSUserDefaults standardUserDefaults] integerForKey:@"healthValue"];


    if  (setbatteryHealthCalculated = 0) {

                [self performSelector:@selector(displayAlert) withObject:nil];

}