Helping with swift layout (Simple for you not me lol) - swift

Question

Hi I am learning how to make newsfeeds and although things are going well I would like some help in terms of the layout of the feed itself. The feed clips to the safe areas of the simulator but I want to move the top section down about half way down the screen. I have made the table view using a XIB and created the table view programatically. How would one be able to shift the top section down? Here is the code:
HomeViewScene = UITableView(frame: view.bounds, style: .plain)
HomeViewScene.backgroundColor = Colors.white
view.addsubview(tableview)
let cellNib = UINib(nibName: "PosterCell", bundle: nil)
HomeViewScene.register(cellNib, forCellReuseIdentifier: "postCell")
var layoutguide:UILayoutGuide
layoutguide = view.safeAreaLayoutGuide
HomeViewScene.leadingAnchor.constraint(equalTo: layoutguide.leadingAnchor).isActive = true
HomeViewScene.topAnchor.constraint(equalTo: layoutguide.topAnchor).isActive = true
HomeViewScene.trailingAnchor.constraint(equalTo: layoutguide.trailingAnchor).isActive = true
HomeViewScene.bottomAnchor.constraint(equalTo: layoutguide.bottomAnchor).isActive = true

Answer 1

It looks to me like you're pretty close. The 2 main things I would suggest are:
1) You need to set translatesAutoresizingMaskIntoConstraints to false if you want your constraints to actually take effect.
2) If you want your table view under your other view, you need to set your table view's top anchor to be equal to your other view's bottom anchor.
Specifically, this is how I would change the code you posted to solve your problem:
HomeViewScene = UITableView(frame: view.bounds, style: .plain)
HomeViewScene.backgroundColor = Colors.white
view.addsubview(tableview)
let cellNib = UINib(nibName: "PosterCell", bundle: nil)
HomeViewScene.register(cellNib, forCellReuseIdentifier: "postCell")
var layoutguide:UILayoutGuide
layoutguide = view.safeAreaLayoutGuide
HomeViewScene.translatesAutoresizingMaskIntoConstraints = false //Add this line
HomeViewScene.leadingAnchor.constraint(equalTo: layoutguide.leadingAnchor).isActive = true
HomeViewScene.topAnchor.constraint(equalTo: otherView.topAnchor).isActive = true //You need to make sure the TOP of the table view is positioned right at the BOTTOM of the other view
HomeViewScene.trailingAnchor.constraint(equalTo: layoutguide.trailingAnchor).isActive = true
HomeViewScene.bottomAnchor.constraint(equalTo: layoutguide.bottomAnchor).isActive = true
Remember that if you change constraints on a view programmatically, you must set translatesAutoresizingMaskIntoConstraints to false otherwise you will see no change to that view's position.