ScrollViewController.swift

//
//  ScrollViewController.swift
//
//  Created by Antonio081014 on 3/6/18.
//  Copyright © 2018 sample.com. All rights reserved.
//

import UIKit



class ScrollViewController: UIViewController {
    let text =  """
                    Lorem ipsum dolor sit amet, in alia adhuc aperiri nam. Movet scripta tractatos cu eum, sale commodo meliore ea eam, per commodo atomorum ea. Unum graeci iriure nec an, ea sit habeo movet electram. Id eius assum persius pro, id cum falli accusam. Has eu fierent partiendo, doming expetenda interesset cu mel, tempor possit vocent in nam. Iusto tollit ad duo, est at vidit vivendo liberavisse, vide munere nonumy sed ex.
                            
                    Quod possit expetendis id qui, consequat vituperata ad eam. Per cu elit latine vivendum. Ei sit nullam aliquam, an ferri epicuri quo. Ex vim tibique accumsan erroribus. In per libris verear adipiscing. Purto aliquid lobortis ea quo, ea utinam oportere qui.
                            

                    """
    fileprivate let scrollView: UIScrollView = {
        let scrollView = UIScrollView()
        scrollView.translatesAutoresizingMaskIntoConstraints = false
        scrollView.backgroundColor = .green
        return scrollView
    }()
    
    fileprivate let contentView: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .purple
        return view
    }()
    
    fileprivate let titleLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.numberOfLines = 0
        label.font = UIFont.preferredFont(forTextStyle: .headline)
        label.textAlignment = .left
        label.backgroundColor = .yellow
        label.text = "App"
        return label
    }()
    
    fileprivate let appDisplay: UILabel = {
        let textView = UILabel()
        textView.translatesAutoresizingMaskIntoConstraints = false
        textView.backgroundColor = .cyan
        textView.numberOfLines = 0
        textView.font = UIFont.preferredFont(forTextStyle: .body)
        return textView
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupViews()
    }
    
    fileprivate func setupViews() {
        self.view.addSubview(self.scrollView)
        self.scrollView.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor).isActive = true
        self.scrollView.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor).isActive = true
        self.scrollView.leftAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.leftAnchor).isActive = true
        self.scrollView.rightAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.rightAnchor).isActive = true
        
        self.scrollView.addSubview(self.contentView)
        self.contentView.topAnchor.constraint(equalTo: self.scrollView.topAnchor).isActive = true
        self.contentView.bottomAnchor.constraint(equalTo: self.scrollView.bottomAnchor).isActive = true
        self.contentView.leftAnchor.constraint(equalTo: self.scrollView.safeAreaLayoutGuide.leftAnchor).isActive = true
        self.contentView.rightAnchor.constraint(equalTo: self.scrollView.safeAreaLayoutGuide.rightAnchor).isActive = true
        self.contentView.widthAnchor.constraint(equalTo: self.view.widthAnchor).isActive = true
        
        self.contentView.addSubview(self.titleLabel)
        self.titleLabel.topAnchor.constraint(equalTo: self.contentView.safeAreaLayoutGuide.topAnchor).isActive = true
        self.titleLabel.leftAnchor.constraint(equalTo: self.contentView.safeAreaLayoutGuide.leftAnchor).isActive = true
        self.titleLabel.rightAnchor.constraint(equalTo: self.contentView.safeAreaLayoutGuide.rightAnchor).isActive = true
        self.titleLabel.heightAnchor.constraint(equalToConstant: 80).isActive = true
        
        self.contentView.addSubview(self.appDisplay)
        self.appDisplay.text = self.text + self.text + self.text + self.text + self.text + self.text + self.text + self.text + self.text + self.text + self.text + self.text + self.text
        self.appDisplay.topAnchor.constraint(equalTo: self.titleLabel.safeAreaLayoutGuide.bottomAnchor, constant: 16).isActive = true
        self.appDisplay.leftAnchor.constraint(equalTo: self.contentView.safeAreaLayoutGuide.leftAnchor).isActive = true
        self.appDisplay.rightAnchor.constraint(equalTo: self.contentView.safeAreaLayoutGuide.rightAnchor).isActive = true
        self.appDisplay.bottomAnchor.constraint(equalTo: self.contentView.safeAreaLayoutGuide.bottomAnchor).isActive = true
    }
}