Question

I am creating a Table View in viewDidAppear, because my app requires it to be created here for multiple reasons. However I notice that I get a memory leak when I analyze my application.

I thought using the instance variable _tableView is not a good idea in any other method besides init and dealloc. Should I just use autorelease, I want to make sure the table gets released at the appropriate time.

There is a property for my Table View.

@property (nonatomic, retain) UITableView *tableView;

And I create the Table View as such:

- (void)viewDidAppear:(BOOL)animated
{
    self.tableView = [[UITableView alloc]
                      initWithFrame:CGRectMake(0, 0, 320, 300) 
                      style:UITableViewStyleGrouped];

    // Table View properties
    self.tableView.dataSource = self;
    self.tableView.delegate = self;

    [self.view addSubview:self.tableView];
}

- (void)viewDidDisappear:(BOOL)animated
{
    self.tableView = nil;
}

- (void)dealloc
{
    [_tableView release];
}

Answer 1

Autorelease. You get one retain for the alloc and another for the property assignment (assuming it’s a retained property).

Your dealloc should handle one and an autorelease the other.