Can't scroll UITableView to bottom

Question

EDIT
This is what happens, so you can see: http://youtu.be/v1HrxYhzJZY.

This is my scenario:
I have a UITableView with 5 sections and 12 cells. This view is opened with a push segue and everything works fine, it scrolls, etc.

Three of those cells open a MKMapView view (through a push segue) another pops up a MFMailComposeViewController.

When I try to go back to my UITableView I'm no longer able to scroll to the bottom. I can only scroll a bit and then it returns to the top of my tableview.

I tried to set the frame size on viewWillAppear, I tried to reload the tableView but it doesn't work!
What could cause this issue?

EDIT
My implementation are:

- (void)viewDidLoad {
    loaded = NO;

    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"my_url", self.userID]];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
        loaded = YES;

        self.user = JSON;
        [self setUserValues];

        [self.tableView reloadData];

    } failure:nil];

    [operation start];

    [super viewDidLoad];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    [self.tableView setContentSize:CGSizeMake(320, 420)];
}

Answer 1

I solved that issue by myself with this simple code:

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    [self.tableView reloadData];
}

Thanks anyway!

Answer 2

The viewWillAppear: method is too early to scroll the table view. The view hasn't been added to the on-screen view hierarchy and laid out yet. Try doing it in viewDidLayoutSubviews.

Answer 3

Use the following code to scroll your tableView to desired section/row:

[tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:desiredRow inSection:desiredSection] atScrollPosition:UITableViewScrollPositionTop animated:NO];

Answer 4

To scroll the tableView, which inherits from UIScrollView, you need to use [self.tableView setContentOffset:CGPointMake(0,100) animated:YES]; and not the setContentSize