ViewWillAppear but nothing

Question

First: excuse me but I don't see tag for code
I have a problem, I have a tabBar / NavigationBar application. I try to use viewWillAppear but nothing.  If I put a simple NSLog the console not show. Where is the problem?
-(void)viewDidLoad {
            [super viewDidLoad];
            [self readArgFromDatabaseSottoArgomenti];
            [self VisualizzaPreferiti];
        - (void)viewWillAppear:(BOOL)animated {
    NSLog(@"test");
            [self VisualizzaPreferiti];
            [self.tableView reloadData];
        -(void) readArgFromDatabaseSottoArgomenti {
            databasePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"ARGOMENTI.sqlite"];
            sqlite3 *databaseDesc;
            // Init the argoments Array
            arraySottoArgomenti = [[NSMutableArray alloc] init];
            // Open the database from the users filessytem
            if(sqlite3_open([databasePath UTF8String], &databaseDesc) == SQLITE_OK) {
                // Setup the SQL Statement and compile it for faster access
                // const char *sqlStatement = "select * from DESCRIZIONE ";
                const char *sqlStatement = [[NSString stringWithFormat:@"SELECT * from DESCRIZIONE ORDER BY id"] UTF8String];
                sqlite3_stmt *compiledStatement;
                if(sqlite3_prepare_v2(databaseDesc, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) {
                    // Loop through the results and add them to the feeds array
                    while(sqlite3_step(compiledStatement) == SQLITE_ROW) {
                        // Read the data from the result row
                        NSString *aID = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)];
                        NSString *aIDArgomento = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)];
                        NSString *aDescrizione = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)];
                        NSString *aTesto = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 3)];
                        // Create a new argoments object with the data from the database
                        ContenutoObjectDescrizione *contenutoSottoArgomenti = [[ContenutoObjectDescrizione alloc] initWithName:aID idArgomento:aIDArgomento descrizione:aDescrizione testo:aTesto];
                        [arraySottoArgomenti addObject:contenutoSottoArgomenti];
                        [contenutoSottoArgomenti release];
                // Release the compiled statement from memory
                sqlite3_finalize(compiledStatement);
            sqlite3_close(databaseDesc);
        - (void) VisualizzaPreferiti {
            int i;
            NSUserDefaults *userPref = [NSUserDefaults standardUserDefaults];
            array = [userPref objectForKey:@"array"];
            NSLog(@"Retain Count %d Numero ID Array %d",[array retainCount],[array count]);
            NSMutableArray *arrayOggettoPreferito;
            arrayOggettoPreferito = [[NSMutableArray alloc] init];
            ContenutoObjectDescrizione *oggetto = [[ContenutoObjectDescrizione alloc] init];
            for (oggetto in arraySottoArgomenti) {
                for (i=0; i<[array count]; i++) {
                    if ([[array objectAtIndex:i] intValue] == [oggetto.id intValue]) {
                        [arrayOggettoPreferito addObject:oggetto];
                        NSLog(@"ID %@ IDMateria %@ Titolo %@",oggetto.id,oggetto.idArgomento,oggetto.descrizione);
            listaPref = arrayOggettoPreferito;
            arrayOggettoPreferito=nil;
            [arrayOggettoPreferito release];
            [oggetto release]; 
        #pragma mark -
        #pragma mark Table view data source
        - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
            // Return the number of sections.
            return 1;
        - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
            // Return the number of rows in the section.
            return [listaPref count];
        // Customize the appearance of table view cells.
        - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
            static NSString *CellIdentifier = @"Cell";
            UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
            if (cell == nil) {
                cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
            ContenutoObjectDescrizione *oggettoCercato = [[ContenutoObjectDescrizione alloc] init];
            oggettoCercato = [listaPref objectAtIndex:[indexPath row]];
            cell.textLabel.text = oggettoCercato.descrizione;
            NSLog(@"%@",oggettoCercato.descrizione);
            return cell;
        #pragma mark -
        #pragma mark Table view delegate
        - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
            [tableView deselectRowAtIndexPath:indexPath animated:YES];
            TestoViewController *testoViewController = [[TestoViewController alloc] initWithNibName:@"TestoView" bundle:nil];
            [self.navigationController pushViewController:testoViewController animated:YES];
            ContenutoObjectDescrizione *oggettoCercato = [[ContenutoObjectDescrizione alloc] init];
            oggettoCercato = [listaPref objectAtIndex:[indexPath row]];
            testoViewController.idPreferito = oggettoCercato.id;
            testoViewController.title = oggettoCercato.descrizione;
            NSString *descrizioneWeb = oggettoCercato.testo;
            NSString *path = [[NSBundle mainBundle] bundlePath];
            NSURL *baseURL = [NSURL fileURLWithPath:path];
            [testoViewController.vistaWeb loadHTMLString:descrizioneWeb baseURL:baseURL];
            [testoViewController release];
        #pragma mark -
        #pragma mark Memory management
        - (void)didReceiveMemoryWarning {
            // Releases the view if it doesn't have a superview.
            [super didReceiveMemoryWarning];
            // Relinquish ownership any cached data, images, etc that aren't in use.
        - (void)viewDidUnload {
            // Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
            // For example: self.myOutlet = nil;
        - (void)dealloc {
            [sup
    er dealloc];

Answer 1

yes, but I solved
the problem was that I use these scheme
RootViewController
- UITabBarController
-- UINavigationController (1 for each tab)
--- MyUIViewController
instead
RootViewController(UITabBarController)
- UINavigationController (1 for each tab)
-- MyUIViewController
now it work!