Anchors Constraints

anchorsconstraints.swift

private func setupAnchorConstraints() {
    view.addSubview(titleLabel)
    view.addSubview(hiButton)

    titleLabel.topAnchor.constraint(equalTo: view.topAnchor, constant: 20).isActive = true
    titleLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20).isActive = true
    titleLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20).isActive = true

    hiButton.topAnchor.constraint(equalTo: titleLabel.bottomAnchor, constant: 8).isActive = true
    hiButton.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20).isActive = true
    hiButton.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20).isActive = true
}