self performSelector:#selector(loadData) withObject:nil - not working - iphone

Question

I use:
self performSelector:#selector(loadData) withObject:nil...
it look like working with some command only in "loadData" but the rest are not.
Here is my viewdidload:
- (void)viewDidLoad
{
[super viewDidLoad];
[mActivity startAnimating];
[self performSelector:#selector(loadData) withObject:nil afterDelay:2];
//[mActivity stopAnimating];
}
and here is loadData:
-(void)loadData
{
[mActivity startAnimating];
NSLog(#"Start LoadData");
AppDelegate *delegate=(AppDelegate *)[[UIApplication sharedApplication] delegate];
NSString *selectData=[NSString stringWithFormat:#"select * from k_proverb ORDER BY RANDOM()"];
qlite3_stmt *statement;
if(sqlite3_prepare_v2(delegate.db,[selectData UTF8String], -1,&statement,nil)==SQLITE_OK){
NSMutableArray *Alldes_str = [[NSMutableArray alloc] init];
NSMutableArray *Alldes_strAnswer = [[NSMutableArray alloc] init];
while(sqlite3_step(statement)==SQLITE_ROW)
{
NSString *des_strChk= [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement,3)];
if ([des_strChk isEqualToString:#"1"]){
NSString *des_str= [NSString stringWithUTF8String:(char *)sqlite3_column_text(statement,4)];
[Alldes_str addObject:des_str];
}
}
Alldes_array = Alldes_str;
Alldes_arrayAnswer = Alldes_strAnswer;
}else{
NSLog(#"ERROR '%s'",sqlite3_errmsg(delegate.db));
}
listOfItems = [[NSMutableArray alloc] init];
NSDictionary *desc = [NSDictionary dictionaryWithObject:
Alldes_array forKey:#"description"];
[listOfItems addObject:desc];
//[mActivity stopAnimating];
NSLog(#"Finish loaData");}
it give me only printing 2 line, but did not load my Data to the table, but if I copy all the code from inside "loadData" and past in "viewDidLoad", it load the data to the table.
Any advice or help please.

Answer 1

A few things: If you see any NSLog output at all, then the performSelector is succeeding. You should change the title of your question.
If you are trying to load data into a table, the method should end with telling the UITableView to reloadData (or a more elaborate load using begin/end updates).
If the listOfItems is the data supporting the table, get this working first by hard-coding something like this:
-(void)loadData {
listOfItems = [NSArray arrayWithObjects:#"test1", #"test2", nil];
[self.tableView reloadData];
return;
// keep all of the code you wrote here. it won't run until you remove the return
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSString *string = [listOfItems objectAtIndex:indexPath.row];
cell.textLabel.text = string;
return cell;
// keep all of the code you probably wrote for this method here.
// as above, get this simple thing running first, then move forward
}
Good luck!