shifting down the UITableViewCells - ios

Question

I have a UITableView, and inside it is a UIView, and dynamic UITableViewCells.
The UIView is positioned in the top of the Table, and the cells come right below it.
My problem is, when I enlarge the UIView after a certain button press, it overlaps the cells below it. Due to the cells being dynamic, I am not sure how to access the cells and move their origin.y downwards.
Furthermore, if I have a lot of cells, I don't really want to be moving each cell one by one.
I tried looking to see if the UITableView has some kind of offset parameter for its cells, but didn't find anything of that sort.
Through the storyboard, when I enlarge the UIView inside the table, the cells automatically are pushed below it, but unfortunately when I enlarge the UIView programatically through the code (after the button press), the cells stay in their original place and don't move.
Here is an illustration to show what is happening:
My AutoLayout is turned off.

Answer 1

It sounds like you want your custom UIView to behave like a UITableViewCell by moving the cells up and down as it grows in height. So do just that. Create a custom UITableViewCell whose height can change dynamically and render that cell at the top (or wherever else you want it).

Answer 2

You should not be putting a UIView inside a UITableView in the manner that you are doing. As I see it, there are two main approaches:
1) Add the UIView above the UITableView. You have mentioned no reason as to why it needs to be inside of it.
UIView *view = [[UIView alloc] init];
UITableView *tableView = [[UITableView alloc] init];
view.translateAutoResizingMaskIntoConstraints = NO;
tableView.translateAutoResizingMaskIntoConstraints = NO;
[self.view addSubview:view];
[self.view addSubview:tableView];
NSDictionary *viewsDictionary = #{#"view" : view, #"tableView" : tableView};
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|[view]" options:kNilOptions metrics:nil viewDictionary:viewsDictionary];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|[view][tableView]|" options:NSLayoutFormatAlignAllLeading | NSLayoutFormatAlignAllTrailing metrics:nil viewDictionary:viewsDictionary];
2) Assuming the UIView absolutely needs to be inside the UITableView, the best way to do it is by using the contentOffset.
CGSize innerViewSize = CGSizeMake(CGRectGetWidth(self.view.bounds), 200.0f);
UIView *innerView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, -innerViewSize.height, innerViewSize.width, innerViewSize.height)];
UITableView *tableView = [[UITableView alloc] initWithStyle:UITableViewStylePlain frame:self.view.bounds];
tableView.contentOffset = CGPointMake(0.0f, innerViewSize.height);
Then, whenever you need to increase the size of the inner view, you change it's y origin and increase the contentOffset.y.