SnapKit Scroll View Example

Demo.swift

//
//  SampleSaleArticleViewController.swift
//  aSample
//
//  Created by Matthew hammond on 09/11/2020.
//

import UIKit
import Buy
import SnapKit

class SampleSaleArticleViewController: UIViewController {
  
    //Scroll View
    let scrollView = UIScrollView()
  
    // IMPORTANT: Add all views "in the scroll view" to this view NOT the scroll view.
    let scrollContentView = UIView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
      
      view.addSubview(scrollView)
      
      scrollView.snp.makeConstraints { make in
        make.edges.equalToSuperview()
      }
      
      scrollView.addSubview(scrollContentView)
      
      scrollContentView.snp.makeConstraints { make in
        make.top.bottom.equalTo(scrollView)
        make.left.right.equalTo(view) // Making the content view of the scroll view the same as teh view controllers view.
      }
      
      setupContainer()
      
    }
    
    func setupContainer() {
        let label = UILabel()
        label.h1("Title Text")
        scrollContentView.addSubview(label)
        
        let textView = UILabel()
        textView.numberOfLines = 0 // Enable multiline for UILabel if you didnt know you could do this.
        textView.text = "Aspinal of London sample sale take up to 80% off RRP on luxury leather goods and accessories."
        scrollContentView.addSubview(textView)
        
        label.snp.makeConstraints { make in
            make.top.left.right.equalToSuperview().inset(50) // So these layouts are to the scrollContentView
        }
        
        textView.snp.makeConstraints { make in
            make.top.equalTo(label.snp.bottom)
            make.left.right.equalToSuperview().inset(50)
            make.height.equalTo(4000) // Just some dummy height so we get some scrolling action, but this will be calculated as needed when you add more views
            make.bottom.equalTo(scrollView.snp.bottom) // THIS IS THE IMPORTANT CONSTRAINT
        }
    }
}