Reload TaUITableViewbleView - iphone

Question

I have a problem, I make a TabBAr application (with navigationbar), the bar bar is a list of favorits stored in an array.
My problem is that if I change ViewController and add object to array, when I come back to UITableView it isn't reloaded...
This is the class:
-
(void)viewDidLoad {
[super viewDidLoad];
[self readArgFromDatabaseSottoArgomenti];
[self VisualizzaPreferiti];
}
- (void)viewWillAppear:(BOOL)animated {
[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 {
[super dealloc];
}

Answer 1

Simply calling reloadData doesn't make it do anything unless you update your datasource. In viewWillAppear, you will need to call VisualizzaPreferiti again before you call reloadData.