Resizing UITextView in custom UITableViewCell

Question

I have a custom UITableViewCell and I\'m trying to resize the UITextView inside it based on the content size. I\'m on iOS7 and using Autolayout.

Answer 1

I had the same issue but in a different situation. I have UItableview with two custom cells.

First Custom cell - self expanding textview. (like email type message box)
Second Custom Cell -  Static image. 

Have a  look at my code. You will get an insight to automatic resizing of cells.

//  ViewController.swift
//  ListWrap

import UIKit

class ViewController: UIViewController,UITableViewDataSource,UITableViewDelegate, UITextViewDelegate {

    @IBOutlet var listWrapTableView: UITableView!

    //CustomCells
    var CellIdentifier: String = "ListWrapTableViewCellID"
    var tapGesture: UITapGestureRecognizer!

    override func viewDidLoad() {
        super.viewDidLoad()
    }
    override func viewWillAppear(animated: Bool) {
        //Adding Tap Gesture To Table
        tapGesture = UITapGestureRecognizer(target: self, action: "tapRecognized:")
        self.listWrapTableView.addGestureRecognizer(tapGesture)
        tapGesture.cancelsTouchesInView = false
        tapGesture.enabled =  true
    }
    func tapRecognized(recognizer: UITapGestureRecognizer){
        self.listWrapTableView.endEditing(true)
    }
    func textViewDidBeginEditing(textView: UITextView) {
        if (CellIdentifier == "ListWrapTableViewCellID")
        {
            tapGesture.enabled =  true
        }
        else
        {
            tapGesture.enabled =  false
        }
    }
    // MARK: - Table view data source
    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }
    func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat
    {
        self.listWrapTableView.rowHeight = UITableViewAutomaticDimension
        return self.listWrapTableView.rowHeight
    }
    func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
        return UITableViewAutomaticDimension
    }
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 2
    }
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        if (indexPath.row == 0)
        {
            let surveyCell = tableView.dequeueReusableCellWithIdentifier(CellIdentifier)! as! ListWrapTableViewCell
            return surveyCell
        }
        else if (indexPath.row == 1)
        {
            let reportsCell = tableView.dequeueReusableCellWithIdentifier("ListWrapSecondTableViewCellID")! as! ListWrapSecondTableViewCell
            return reportsCell
        }
        else
        {
            let cell:UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "")
            return cell
        }
    }
    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
    {
    }
}



The first Custom cell:

//  ListWrapTableViewCell.swift
//  ListWrap

import UIKit

class ListWrapTableViewCell: UITableViewCell{

    @IBOutlet var listWrapTextView: UITextView!

//
//  override init?(style: UITableViewCellStyle, reuseIdentifier: String!) {
//      super.init(style: style, reuseIdentifier: reuseIdentifier)
//  }

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!
    }

    /// Custom setter so we can initialise the height of the text view
    var textString: String {
        get {
            return listWrapTextView.text
        }
        set {
            listWrapTextView.text = newValue
            textViewDidChange(listWrapTextView)
        }
    }

    override func awakeFromNib() {
        super.awakeFromNib()
        listWrapTextView.scrollEnabled = false
        listWrapTextView.delegate = self
    }
    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
        if selected {
            listWrapTextView.becomeFirstResponder()
        } else {
            listWrapTextView.resignFirstResponder()
        }
    }
}
extension ListWrapTableViewCell: UITextViewDelegate {
    func textViewDidChange(textView: UITextView) {

        let size = textView.bounds.size
        let newSize = textView.sizeThatFits(CGSize(width: size.width, height: CGFloat.max))

        // Resize the cell only when cell's size is changed
        if size.height != newSize.height {
            UIView.setAnimationsEnabled(false)
            tableView?.beginUpdates()
            tableView?.endUpdates()
            UIView.setAnimationsEnabled(true)

            if let thisIndexPath = tableView?.indexPathForCell(self) {
                tableView?.scrollToRowAtIndexPath(thisIndexPath, atScrollPosition: .Bottom, animated: false)
            }
        }
    }
}
extension UITableViewCell {
    /// Search up the view hierarchy of the table view cell to find the containing table view
    var tableView: UITableView? {
        get {
            var table: UIView? = superview
            while !(table is UITableView) && table != nil {
                table = table?.superview
            }

            return table as? UITableView
        }
    }
}

The second custom cell: 

//  ListWrapSecondTableViewCell.swift
//  ListWrap


import UIKit

class ListWrapSecondTableViewCell: UITableViewCell {

    override func awakeFromNib() {
        super.awakeFromNib()
    }
    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
    }

}


attaching storyBoard for further reference.