Question

When I replace the @"hello" with titlestring the table, the cell shows up blank, If i leave the hello, everything works, including the “detailsstring”. I don’t know why it’s doing that since detailsstring is set up exactly the same as titlestring.
here is the code:
in the .m file I have

@synthesize  detailsstring;
@synthesize  titlestring;

and it’s all defined the same in the .h in the .m I have this as well:

- (void)viewDidLoad{        
    titlestring =[[NSUserDefaults standardUserDefaults] objectForKey:@"titletext"];
    detailsstring = [[NSUserDefaults standardUserDefaults] objectForKey:@"details"];

    tabledata = [[NSArray alloc] initWithObjects:@"hello", nil];
    tablesubtitles = [[NSArray alloc] initWithObjects:detailsstring, nil];
    [super viewDidLoad];
}

Now, I’m saving those Userdefaults in another controller. Here is the save button action in a different view controller:

- (IBAction)saveButton:(id)sender {
    NSUserDefaults *titletext = [NSUserDefaults standardUserDefaults];
    [titletext setObject:titleTextfield.text forKey:@"titletext"];

    NSUserDefaults *details = [NSUserDefaults standardUserDefaults];
    [details setObject:detailstextfield.text forKey:@"details"];

    NSUserDefaults *categoryUser = [NSUserDefaults standardUserDefaults];
    [categoryUser setInteger:selectedCategory forKey:@"category"];
}

What am I doing wrong?

Answer 1

First of all, one instance of NSUserDefaults is sufficient for all three modifications. To ‘push’ the changes to the file system immediately, you can call [userDefaults synchronize];. Otherwise there is no guarantee that your changes are saved instantly. Apple suggests only to call this method if you cannot wait for the changes to be saved.

- (IBAction)saveButton:(id)sender {
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:titleTextfield.text forKey:@"titletext"];
    [userDefaults setObject:detailstextfield.text forKey:@"details"];
    [userDefaults setInteger:selectedCategory forKey:@"category"];
    [userDefaults synchronize];
}

In your viewDidLoad: method, try to output the saved values to test your application’s integrity:

NSLog(@"%@", [[NSUserDefaults standardUserDefaults] objectForKey:@"details"]);