Programatically add multiple horizontally stack views inside vertical stack view

Question

This is the layout I want to achieve

Label1 UIView Label2 <- horizontally stack view
Label1 UIView Label2
Label1 UIView Label2
Label1 UIView Label2
Label1 UIView Label2

Every horizontally stack view contains a label and view and another label. After that the horizontal stack view is added to a vertical one.

So all of that layout is a vertical stack view.

I want to achieve this inside a UITableViewCell . Here is my code:

let verticalStackView: UIStackView = {
        let hsv = UIStackView()
        hsv.axis = .vertical
        hsv.alignment = .fill
        hsv.distribution = .fill
        hsv.spacing = 10
        hsv.translatesAutoresizingMaskIntoConstraints = false

        return hsv
    }()

    override func awakeFromNib() {
        super.awakeFromNib()

        for i in 1..<10 {
            let dayLbl: UILabel = {
                let l = UILabel()
                l.text = "Day " + String(i)
                l.font = UIFont.preferredFont(forTextStyle: .caption1)
                l.translatesAutoresizingMaskIntoConstraints = false

                return l;
            }()

            let progressBar: ProgressBar = {
               let pb = ProgressBar(frame: CGRect(x: 0, y: 0, width: 200, height: 12))
                pb.translatesAutoresizingMaskIntoConstraints = false

                return pb;
            }()

            let gradeLbl: UILabel = {
                let l = UILabel()
                l.text = String(i)
                l.font = UIFont.preferredFont(forTextStyle: .headline)
                l.translatesAutoresizingMaskIntoConstraints = false

                return l;
            }()

            let horizontalStackView: UIStackView = {
               let hsv = UIStackView()
                hsv.axis = .horizontal
                hsv.alignment = .fill
                hsv.distribution = .fill
                hsv.spacing = 5
                hsv.translatesAutoresizingMaskIntoConstraints = false

                return hsv
            }()

            horizontalStackView.addSubview(dayLbl)
            horizontalStackView.addSubview(progressBar)
            horizontalStackView.addSubview(gradeLbl)

            NSLayoutConstraint.activate([
                horizontalStackView.heightAnchor.constraint(equalToConstant: 12)
            ])

            verticalStackView.addSubview(horizontalStackView)
        }

        contentView.addSubview(verticalStackView)

        NSLayoutConstraint.activate([
            verticalStackView.topAnchor.constraint(equalTo: vcTitle.bottomAnchor, constant: 30),
            verticalStackView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 20),
            verticalStackView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: 20),
            verticalStackView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: 30),
            ])
    }

This is what I get:

It was supposed to appear under the "Productivity Chart" title, but it appears on the cell content view x:0 y: 0 location. And there is only one line and everything looks crowded there.

Any idea what I am doing wrong ?

This is how one line should look:

Day 1 ----------------- 7   
(where ----- is the view).

edit:

After replacing addSubView with addArrangedSubview :

edit 2:

The right part truncated is fixed too. I changed:

verticalStackView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: 20)

to

contentView.trailingAnchor.constraint(equalTo: verticalStackView.trailingAnchor, constant: 20)

Answer 1

When you are adding new subviews to a UIStackView, you should use addArrangedSubview method.

The stack view ensures that the arrangedSubviews array is always a subset of its subviews array. This method automatically adds the provided view as a subview of the stack view, if it is not already. If the view is already a subview, this operation does not alter the subview ordering.