How to programmatically change the width of a UITableView?

Question

iOS

Hello.
In general, there is a UIViewController in which I placed a UITableView in full screen (main UIView). iPad. I use a storyboard.
There is a task: when an entry is selected in a UITableView, the size and position of the UItableView should change (the width decreases, and the view itself shifts to the right). And a view (or without it) with the details of the selected record should be displayed on the left.

I tried to do it in the following way:
Controller code:

- (void)viewDidLoad {
    [super viewDidLoad];
    bigFrame = self.tableView.frame;
    CGFloat xOffset = 256;
    smallFrame = CGRectMake(bigFrame.origin.x + xOffset, bigFrame.origin.y, bigFrame.size.width - xOffset, bigFrame.size.height);
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    tableView.frame = smallFrame;
}

The problem is that in this case it only works on the second selection attempt.
Please explain how to do this behavior in the interface. SplitViewController is not used.

Answer 1

You can move the tableView Leading Space to Superview to Outlet, and change it

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    self.leftSpace.constant = 256;
    [UIView animateWithDuration:animationDuration animations:^
    {
        [self.view layoutIfNeeded];
    }];
}

- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    self.leftSpace.constant = 0;
    [UIView animateWithDuration:animationDuration animations:^
    {
        [self.view layoutIfNeeded];
    }];
}

Answer 2

ifau, Thank you. Helped.
I also found out that if the tableView is created programmatically via initWithFrame, then the problem described above does not arise.