hackiftekhar/IQKeyboardManager

//
//  NonScrollTextView1979ViewController.swift
//  https://github.com/hackiftekhar/IQKeyboardManager
//  Copyright (c) 2013-24 Iftekhar Qurashi.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import UIKit

class NonScrollTextView1979ViewController: BaseViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let scrollView = UIScrollView()
        view.addSubview(scrollView)
        scrollView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            scrollView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
            scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
            scrollView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
            scrollView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)
        ])

        setupForStackView(in: scrollView)
//        setupForView(in: scrollView)
    }

    private func setupForStackView(in scrollView: UIScrollView) {
        let stackView = UIStackView()
        stackView.spacing = 10
        stackView.axis = .vertical
        scrollView.addSubview(stackView)
        stackView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            stackView.widthAnchor.constraint(equalTo: scrollView.widthAnchor, constant: -20),
            stackView.leadingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.leadingAnchor, constant: 10),
            stackView.trailingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.trailingAnchor),
            stackView.topAnchor.constraint(equalTo: scrollView.contentLayoutGuide.topAnchor),
            stackView.bottomAnchor.constraint(equalTo: scrollView.contentLayoutGuide.bottomAnchor)
        ])

        for index in 1...8 {
            let textView = UITextView()
            textView.text = "\(index)"
            textView.backgroundColor = .lightGray
            textView.textColor = UIColor.black
            textView.isEditable = true
            // if set isScrollEnabled to true, it works fine
            textView.isScrollEnabled = false
            stackView.addArrangedSubview(textView)
            textView.translatesAutoresizingMaskIntoConstraints = false
            NSLayoutConstraint.activate([
                textView.heightAnchor.constraint(equalToConstant: 500)
            ])
        }
    }

    private func setupForView(in scrollView: UIScrollView) {
        let eachHeight: CGFloat = 600
        let gap: CGFloat = 10
        let stackView = UIView()
        scrollView.addSubview(stackView)
        stackView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            stackView.widthAnchor.constraint(equalTo: scrollView.widthAnchor, constant: -20),
            stackView.heightAnchor.constraint(equalToConstant: (eachHeight + gap) * 8),
            stackView.leadingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.leadingAnchor, constant: 10),
            stackView.trailingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.trailingAnchor),
            stackView.topAnchor.constraint(equalTo: scrollView.contentLayoutGuide.topAnchor),
            stackView.bottomAnchor.constraint(equalTo: scrollView.contentLayoutGuide.bottomAnchor)
        ])

        for index in 1...8 {
            let textView = UITextView()
            textView.text = "\(index)"
            textView.backgroundColor = .lightGray
            textView.textColor = UIColor.black
            textView.isEditable = true
            // if set isScrollEnabled to true, it works fine
            textView.isScrollEnabled = false
            stackView.addSubview(textView)
            textView.translatesAutoresizingMaskIntoConstraints = false
            NSLayoutConstraint.activate([
                textView.topAnchor.constraint(equalTo: stackView.topAnchor,
                                              constant: (eachHeight + gap) * CGFloat(index-1)),
                textView.widthAnchor.constraint(equalTo: stackView.widthAnchor),
                textView.heightAnchor.constraint(equalToConstant: eachHeight)
            ])
        }
    }
}