Scroll View is moving horizontally and not vertically - swift

Question

I have created a scroll view and I have tried many different methods as you can see below, however I always get the same outcome where the scroll view moves horizontally. I want it to move vertically, but it is not. Also, the text view shows the entire message in one line and does not use multiple lines as was happening before I added the scroll view.
import UIKit
import SafariServices
class MainView: UIViewController {
let transition = MainDropMenuAnimation()
let scrollView = UIScrollView()
let scrollViewView = UIView()
let factView = QuickFact()
let socialMediaSV = SocialMediaSV()
let logo = UIImageView()
let aboutUs = UITextView()
let dropMenuButton = UIButton(type: .custom)
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor(patternImage: #imageLiteral(resourceName: "HomeBackground"))
addQuickFactView()
setupScrollView()
setupNavBar()
}
func setupNavBar() {
navigationItem.title = "Home"
navigationController?.navigationBar.barTintColor = .clear
dropMenuButton.setImage(#imageLiteral(resourceName: "dropMenuButton"), for: .normal)
dropMenuButton.addTarget(self, action: #selector(handleDropMenu), for: .touchUpInside)
dropMenuButton.heightAnchor.constraint(equalToConstant: 50).isActive = true
dropMenuButton.widthAnchor.constraint(equalTo: dropMenuButton.heightAnchor).isActive = true
let leftButton = UIBarButtonItem(customView: dropMenuButton)
self.navigationItem.leftBarButtonItem = leftButton
}
#objc func handleDropMenu() {
let dropMenu = DropViewContainer()
dropMenu.modalPresentationStyle = .overCurrentContext
dropMenu.transitioningDelegate = self
present(dropMenu, animated: true)
}
func addQuickFactView() {
addChild(factView)
view.addSubview(factView.view)
factView.didMove(toParent: self)
factView.view.translatesAutoresizingMaskIntoConstraints = false
factView.view.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
factView.view.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
factView.view.topAnchor.constraint(equalTo: view.topAnchor, constant: 100).isActive = true
factView.view.heightAnchor.constraint(equalToConstant: 200).isActive = true
}
func setupScrollView() {
setupView()
scrollView.contentSize.height = 3000
view.addSubview(scrollView)
positionScrollView()
}
func positionScrollView() {
scrollView.translatesAutoresizingMaskIntoConstraints = false
scrollView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
scrollView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
scrollView.topAnchor.constraint(equalTo: factView.view.bottomAnchor).isActive = true
scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
}
func setupView() {
setupLogo()
setupAboutUs()
setupSocialMediaSV()
scrollView.addSubview(scrollViewView)
positionView()
}
func positionView() {
scrollViewView.translatesAutoresizingMaskIntoConstraints = false
scrollViewView.rightAnchor.constraint(equalTo: scrollView.rightAnchor).isActive = true
scrollViewView.leftAnchor.constraint(equalTo: scrollView.leftAnchor).isActive = true
scrollViewView.topAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
scrollViewView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
}
func setupLogo() {
logo.image = #imageLiteral(resourceName: "Logo")
scrollViewView.addSubview(logo)
positionLogo()
}
func positionLogo() {
logo.translatesAutoresizingMaskIntoConstraints = false
logo.widthAnchor.constraint(equalToConstant: 200).isActive = true
logo.heightAnchor.constraint(equalToConstant: 200).isActive = true
logo.centerXAnchor.constraint(equalTo: scrollViewView.centerXAnchor).isActive = true
logo.topAnchor.constraint(equalTo: scrollViewView.topAnchor, constant: 20).isActive = true
}
func setupAboutUs() {
let aboutUsText = (NSMutableAttributedString(string: "About Us\n", attributes: [NSAttributedString.Key.font: UIFont.boldSystemFont(ofSize: 25)]))
aboutUsText.append(NSMutableAttributedString(string: "At Cleaner Together, we are commited to promoting recycling, reusing, and reducing (and of course composting), while spreading sanitization and cleanliness around the world. At the moment, we are just encouraging proper waste disposal, however with proper funding we have many projects we hope to accomplish.", attributes: [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 17), NSAttributedString.Key.foregroundColor: UIColor.black]))
aboutUs.attributedText = aboutUsText
aboutUs.textColor = .black
aboutUs.textAlignment = .left
aboutUs.isScrollEnabled = false
aboutUs.isEditable = false
aboutUs.backgroundColor = .init(white: 1.0, alpha: 0.5)
aboutUs.layer.cornerRadius = 20
scrollViewView.addSubview(aboutUs)
positionAboutUs()
}
func positionAboutUs() {
aboutUs.translatesAutoresizingMaskIntoConstraints = false
aboutUs.rightAnchor.constraint(equalTo: scrollViewView.rightAnchor, constant: -20).isActive = true
aboutUs.leftAnchor.constraint(equalTo: scrollViewView.leftAnchor, constant: 20).isActive = true
aboutUs.heightAnchor.constraint(equalToConstant: 200).isActive = true
aboutUs.topAnchor.constraint(equalTo: logo.bottomAnchor, constant: 20).isActive = true
}
func setupSocialMediaSV() {
addChild(socialMediaSV)
scrollViewView.addSubview(socialMediaSV.view)
socialMediaSV.didMove(toParent: self)
socialMediaSV.view.translatesAutoresizingMaskIntoConstraints = false
socialMediaSV.view.centerXAnchor.constraint(equalTo: scrollViewView.centerXAnchor).isActive = true
socialMediaSV.view.widthAnchor.constraint(equalToConstant: 240).isActive = true
socialMediaSV.view.topAnchor.constraint(equalTo: aboutUs.bottomAnchor, constant: 20).isActive = true
socialMediaSV.view.heightAnchor.constraint(equalToConstant: 40).isActive = true
}
}
extension MainView: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.isPresenting = true
return transition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.isPresenting = false
return transition
}
}

Answer 1

You should check your constraints and make sure that your scroll view has correct contentSize.
Make scrollViewView left and right anchors also equalTo viewController's view. In func positionView()