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@JAIRMG
Created December 17, 2019 03:20
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Scroll view controller example finished
import UIKit
class ScrollViewController: UIViewController {
let scrollView: UIScrollView = {
let scrollView = UIScrollView()
scrollView.translatesAutoresizingMaskIntoConstraints = false
scrollView.backgroundColor = .lightGray
return scrollView
}()
let containerView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = .white
return view
}()
let redButton: UIButton = {
let btn = UIButton()
btn.translatesAutoresizingMaskIntoConstraints = false
btn.backgroundColor = .red
return btn
}()
let stackContainer: UIStackView = {
let stack = UIStackView()
stack.axis = .vertical
stack.spacing = 10
stack.translatesAutoresizingMaskIntoConstraints = false
return stack
}()
let blueLabel: UILabel = {
let lbl = UILabel()
lbl.translatesAutoresizingMaskIntoConstraints = false
lbl.heightAnchor.constraint(equalToConstant: 900).isActive = true
lbl.backgroundColor = .blue
return lbl
}()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
addScrollView()
addContainerView()
addRedButton()
addStackView()
}
private func addScrollView() {
view.addSubview(scrollView)
scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
}
private func addContainerView() {
scrollView.addSubview(containerView)
containerView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
containerView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
containerView.topAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
containerView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
}
private func addRedButton() {
containerView.addSubview(redButton)
redButton.topAnchor.constraint(equalTo: containerView.topAnchor).isActive = true
redButton.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 10).isActive = true
redButton.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -10).isActive = true
redButton.heightAnchor.constraint(equalToConstant: 200).isActive = true
}
private func addStackView() {
containerView.addSubview(stackContainer)
stackContainer.topAnchor.constraint(equalTo: redButton.bottomAnchor, constant: 50).isActive = true
stackContainer.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 50).isActive = true
stackContainer.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -50).isActive = true
stackContainer.addArrangedSubview(blueLabel)
// IMPORTANT: 🚨 🚨
scrollView.bottomAnchor.constraint(equalTo: stackContainer.bottomAnchor).isActive = true
}
}
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