ViewModel-extension.swift

//
//  NewsFeedVM-extension.swift
//  Bayello
//
//  Created by Aboussa Folivi FOLLY on 01/03/2019.
//  Copyright © 2019 Aboussa Folivi FOLLY. All rights reserved.
//

import Foundation
import UIKit

extension NewsFeedVM {
    func addScrollView(){
        addSubview(_scrollView)
        _scrollView.bounces = false
    }
    
    func addScroller(){
        scroller.alpha = 0.5
        _scrollView.addSubview(scroller)
    }
    
    func applyConstraints(){
        NSLayoutConstraint.activate([
            _scrollView.topAnchor.constraint(equalTo: safeAreaLayoutGuide.topAnchor),
            _scrollView.bottomAnchor.constraint(equalTo: safeAreaLayoutGuide.bottomAnchor),
            _scrollView.leadingAnchor.constraint(equalTo: leadingAnchor),
            _scrollView.trailingAnchor.constraint(equalTo: trailingAnchor),
//            _scrollView.heightAnchor.constraint(equalToConstant: 1200),
            
            scroller.topAnchor.constraint(equalTo: _scrollView.topAnchor),
            scroller.bottomAnchor.constraint(equalTo: _scrollView.bottomAnchor),
            scroller.leadingAnchor.constraint(equalTo: _scrollView.leadingAnchor),
            scroller.trailingAnchor.constraint(equalTo: _scrollView.trailingAnchor),
            scroller.centerXAnchor.constraint(equalTo: _scrollView.centerXAnchor),
            scroller.heightAnchor.constraint(equalToConstant: 1200),

            
        ])
    }
}

ViewModel.swift

//
//  NewsFeedVM.swift
//  Bayello
//
//  Created by Aboussa Folivi FOLLY on 12/02/2019.
//  Copyright © 2019 Aboussa Folivi FOLLY. All rights reserved.
//

import UIKit
import FontAwesome_swift

class NewsFeedVM: UIView{
    lazy var _scrollView: UIScrollView = {
        let _scv = UIScrollView()
        _scv.translatesAutoresizingMaskIntoConstraints = false
        _scv.contentSize.height = 1200
        return _scv
    }()
    
    lazy var scroller: UIView = {
        createView()
    }()

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = #colorLiteral(red: 0.9452448487, green: 0.9422780871, blue: 0.947571218, alpha: 1)
        setupSubviews()
    }
    
    
    fileprivate func setupSubviews(){
        addScrollView()
        addScroller()
        applyConstraints()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}