UIView height adjust any content

UIView height adjust any content

//
//  ViewController.swift
//  LoveiOS
//
//  Created by Imran on 9/5/20.
//  Copyright © 2020 portonics. All rights reserved.
//

import UIKit
extension UIView {

  // OUTPUT 1
  func dropShadow(scale: Bool = true) {
    layer.masksToBounds = false
    layer.shadowColor = UIColor.black.cgColor
    layer.shadowOpacity = 0.5
    layer.shadowOffset = CGSize(width: -1, height: 1)
    layer.shadowRadius = 1

    layer.shadowPath = UIBezierPath(rect: bounds).cgPath
    layer.shouldRasterize = true
    layer.rasterizationScale = scale ? UIScreen.main.scale : 1
  }

  // OUTPUT 2
  func dropShadow(color: UIColor, opacity: Float = 0.5, offSet: CGSize, radius: CGFloat = 1, scale: Bool = true) {
    layer.masksToBounds = false
    layer.shadowColor = color.cgColor
    layer.shadowOpacity = opacity
    layer.shadowOffset = offSet
    layer.shadowRadius = radius

    layer.shadowPath = UIBezierPath(rect: self.bounds).cgPath
    layer.shouldRasterize = true
    layer.rasterizationScale = scale ? UIScreen.main.scale : 1
  }
}

class ViewController: UIViewController {
    let contentView = UIView()
    let scrollView = UIScrollView()
    let mainContentView = UIView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
//        view.backgroundColor = .red
        setupScrollView()
    }
    
    func setupScrollView(){
        scrollView.translatesAutoresizingMaskIntoConstraints = false
        mainContentView.translatesAutoresizingMaskIntoConstraints = false
        
        view.addSubview(scrollView)
        scrollView.addSubview(mainContentView)
        
        scrollView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
        scrollView.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
        scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
        scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
        
        mainContentView.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor).isActive = true
        mainContentView.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true
        mainContentView.topAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
        mainContentView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
        
        mainContentView.addSubview(contentView)
        contentView.backgroundColor = UIColor.init(red: 247/255, green: 242/255, blue: 237/255, alpha: 1)
        contentView.layer.cornerRadius = 4
        contentView.layer.shadowColor = UIColor.darkGray.cgColor
        contentView.layer.shadowOpacity = 0.5
          contentView.layer.shadowOffset = .zero
          contentView.layer.shadowRadius = 2
//        contentView.dropShadow(color: .red, offSet: CGSize(width: 1, height: 1))
//        contentView.dropShadow(color: .red, opacity: 1, offSet: CGSize(width: -1, height: 1), radius: 3, scale: true)

        contentView.translatesAutoresizingMaskIntoConstraints = false
        contentView.leftAnchor.constraint(equalTo: mainContentView.leftAnchor, constant: 10).isActive = true
        contentView.topAnchor.constraint(equalTo: mainContentView.topAnchor, constant: 10).isActive = true
        contentView.rightAnchor.constraint(equalTo: mainContentView.rightAnchor, constant: -10).isActive = true
        contentView.bottomAnchor.constraint(equalTo: mainContentView.bottomAnchor, constant: -50).isActive =  true
        contentView.setContentHuggingPriority(.init(rawValue: 250), for: .vertical)
        
        contentView.addSubview(textLabel)
        textLabel.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 10).isActive = true
        textLabel.leftAnchor.constraint(equalTo: contentView.leftAnchor, constant: 10).isActive = true
        textLabel.rightAnchor.constraint(equalTo: contentView.rightAnchor, constant: -10).isActive = true
//        textLabel.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -10).isActive = true
        
        contentView.addSubview(buttonTap)
        buttonTap.topAnchor.constraint(equalTo: textLabel.bottomAnchor, constant: 10).isActive = true
      //  buttonTap.leftAnchor.constraint(equalTo: contentView.leftAnchor, constant: 10).isActive = true
        buttonTap.rightAnchor.constraint(equalTo: contentView.rightAnchor, constant: -10).isActive = true
        buttonTap.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -10).isActive = true
        buttonTap.heightAnchor.constraint(equalToConstant: 30).isActive = true
        buttonTap.widthAnchor.constraint(equalToConstant: 80).isActive = true
    }
    
    let textLabel : UILabel = {
        let text = UILabel()
      text.text = "Here you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative waterHere you increment or decrement the counter depending on the button’s isAddButton. Though you could set the counter to fewer than zero, it probably won’t work with Flo. Nobody can drink negative water00"
        text.numberOfLines = 0
        text.translatesAutoresizingMaskIntoConstraints = false
        return text
    }()
    
    
    let buttonTap : UIButton = {
        let button = UIButton()
        button.translatesAutoresizingMaskIntoConstraints = false
        button.setTitle("View More", for: .normal)
        button.setTitleColor(.link, for: .normal)
        button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 12)
        button.backgroundColor = .lightText
        button.layer.cornerRadius = 4
        return button
    }()
}