Question

Good morning, I made an IBAction method which saves some objects to an array:

-(IBAction)saveToFav:(id)sender
{
    NSUserDefaults *newDefaults = [NSUserDefaults standardUserDefaults];
    favorites = [[NSMutableArray alloc]initWithArray:[newDefaults mutableArrayValueForKey:@"favorites"] copyItems:YES];

    // check if array already contains an object

    if (![favorites containsObject:self.title])
    {
        [favorites addObject:self.title];
    }
    [newDefaults setObject:favorites forKey:@"favorites"];
}

However, when I call this method app crashes with error:

[NSKeyValueSlowMutableArray getObjects:range:]: value for key
favorites of object 0x8939030 is nil’

Why this happens ?
Thanks!

Max

Answer 1

It seems like your data (favorites) has not been written to your defaults.You can forcesave your defaults by running this:

[[NSUserDefaults standardUserDefaults] synchronize];