How to Implement UITextView inside UITableView inside UITableView Swift

Question

how to implement UITextView inside UITableView inside UITableView ??

(1) If you type text in \'UITextView\', the height of \'UITableViewCell2\' is automatically

Answer 1

Nesting table views may not be the ideal solution for this, but your UITableViewCell would need to estimate and measure the whole height of the embedded UITableView, and propagate changes up to the parent table.

Answer 2

You might want to give this a try...

It using a single-section table view. Each cell contains a UIStackView that arranges the (variable) UITextViews.

No @IBOutlet or @IBAction or prototype cell connections... just assign a standard UIViewController custom class to TableTextViewsViewController:

//
//  TableTextViewsViewController.swift
//  Created by Don Mag on 3/10/20.
//

import UIKit

class TextViewsCell: UITableViewCell, UITextViewDelegate {

    let frameView: UIView = {
        let v = UIView()
        v.backgroundColor = .clear

        v.layer.borderColor = UIColor(red: 0.0, green: 0.5, blue: 0.0, alpha: 1.0).cgColor
        v.layer.borderWidth = 1

        v.translatesAutoresizingMaskIntoConstraints = false
        return v
    }()

    let stackView: UIStackView = {
        let v = UIStackView()
        v.axis = .vertical
        v.spacing = 8
        v.translatesAutoresizingMaskIntoConstraints = false
        return v
    }()

    let stackViewPadding: CGFloat = 8.0

    var textViewCosure: ((Int, String)->())?

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        commonInit()
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
        commonInit()
    }

    func commonInit() -> Void {

        let g = contentView.layoutMarginsGuide

        contentView.addSubview(frameView)
        frameView.addSubview(stackView)

        // bottom constraint needs to be less than 1000 (required) to avoid auot-layout warnings
        let frameViewBottomConstrait = frameView.bottomAnchor.constraint(equalTo: g.bottomAnchor, constant: 0.0)
        frameViewBottomConstrait.priority = UILayoutPriority(rawValue: 999)

        NSLayoutConstraint.activate([

            frameView.topAnchor.constraint(equalTo: g.topAnchor, constant: 0.0),
            frameView.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 0.0),
            frameView.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: 0.0),
            frameViewBottomConstrait,

            stackView.topAnchor.constraint(equalTo: frameView.topAnchor, constant: stackViewPadding),
            stackView.leadingAnchor.constraint(equalTo: frameView.leadingAnchor, constant: stackViewPadding),
            stackView.trailingAnchor.constraint(equalTo: frameView.trailingAnchor, constant: -stackViewPadding),
            stackView.bottomAnchor.constraint(equalTo: frameView.bottomAnchor, constant: -stackViewPadding),

        ])

    }

    override func prepareForReuse() {
        super.prepareForReuse()
        stackView.arrangedSubviews.forEach {
            $0.removeFromSuperview()
        }
    }

    func fillData(_ strings: [String]) -> Void {
        strings.forEach {
            let v = UITextView()

            v.font = UIFont.systemFont(ofSize: 16.0)
            v.isScrollEnabled = false

            // hugging and compression resistance set to required for cell expansion animation
            v.setContentHuggingPriority(.required, for: .vertical)
            v.setContentCompressionResistancePriority(.required, for: .vertical)

            v.text = $0

            // frame the text view
            v.layer.borderColor = UIColor.blue.cgColor
            v.layer.borderWidth = 1

            v.delegate = self
            stackView.addArrangedSubview(v)
        }
    }

    func textViewDidChange(_ textView: UITextView) {
        guard let idx = stackView.arrangedSubviews.firstIndex(of: textView) else {
            fatalError("Shouldn't happen, but couldn't find the textView index")
        }
        textViewCosure?(idx, textView.text)
    }

}

class TableTextViewsViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    let topLabel: UILabel = {
        let v = UILabel()
        v.text = "Top Label"
        v.translatesAutoresizingMaskIntoConstraints = false
        return v
    }()

    let tableView: UITableView = {
        let v = UITableView()

        v.layer.borderColor = UIColor.red.cgColor
        v.layer.borderWidth = 1

        v.translatesAutoresizingMaskIntoConstraints = false
        return v
    }()

    var myData: [[String]] = [[String]]()
    var textViewsInRows: [Int] = [
        3, 4, 2, 6, 1, 4, 3,
    ]

    override func viewDidLoad() {
        super.viewDidLoad()

        // generate some dummy data
        var i = 1
        textViewsInRows.forEach {
            var s: [String] = [String]()
            for j in 1...$0 {
                s.append("Table Row: \(i) TextView \(j)")
            }
            myData.append(s)
            i += 1
        }

        view.addSubview(topLabel)
        view.addSubview(tableView)

        let g = view.safeAreaLayoutGuide

        NSLayoutConstraint.activate([

            topLabel.topAnchor.constraint(equalTo: g.topAnchor, constant: 8.0),
            topLabel.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 8.0),
            topLabel.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -8.0),

            tableView.topAnchor.constraint(equalTo: topLabel.bottomAnchor, constant: 8.0),
            tableView.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 8.0),
            tableView.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -8.0),
            tableView.bottomAnchor.constraint(equalTo: g.bottomAnchor, constant: -8.0),

        ])

        tableView.dataSource = self
        tableView.delegate = self

        tableView.separatorStyle = .none
        tableView.keyboardDismissMode = .onDrag

        tableView.register(TextViewsCell.self, forCellReuseIdentifier: "TextViewsCell")

    }

    // MARK: - Table view data source

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return myData.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "TextViewsCell", for: indexPath) as! TextViewsCell

        cell.fillData(myData[indexPath.row])

        cell.textViewCosure = { [weak self] idx, str in
            // update our data
            self?.myData[indexPath.row][idx] = str
            // update table view cell height
            self?.tableView.beginUpdates()
            self?.tableView.endUpdates()
        }

        return cell
    }

}

Result - red border is the tableView, green border is each cell's contentView, blue border is each textView: