Get text from UITextView Swift 2

Question

I m doing an iOS project using swift 2, I have a UITableView with custom cells. I have one cell with a UITextView and a simple label, and I wan't to get the value of this UITextView when it's modified, but it's not like UITextFields, I can't use on edit begin method. How can I do that ?

Here is my code to define my custom cell :

let cell = tableView.dequeueReusableCellWithIdentifier(CurrentFormTableView.CellIdentifiers.ParagraphCell, forIndexPath: indexPath) as! ParagraphCell cell.display(block) cell.selectionStyle = UITableViewCellSelectionStyle.None tableView.rowHeight = UITableViewAutomaticDimension tableView.estimatedRowHeight = 160.0 return cell

And here is my ParagraphCell.swift

import UIKit protocol ParagraphCell { func update ParagraphCell(cell: ParagraphCell, rep: String) } class ParagraphCell: UITableViewCell { @IBOutlet weak var titleLabel: UILabel! @IBOutlet weak var answerField: UITextView! var delegate: ParagraphCell Delegate? override func awakeFromNib() { super.awakeFromNib() // Initialization code let borderColor : UIColor = UIColor(red: 0.85, green: 0.85, blue: 0.85, alpha: 1.0) answerField.layer.borderWidth = 0.5 answerField.layer.borderColor = borderColor.CGColor answerField.layer.cornerRadius = 5.0 } override func setSelected(selected: Bool, animated: Bool) { super.setSelected(selected, animated: animated) // Configure the view for the selected state } func display(block: Block){ titleLabel.text = block.title answerField.text = "" } //THIS METHOD IS NEVER CALLED... func textViewDidChange(textView: UITextView) { //Handle the text changes here print(textView.text); //the textView parameter is the textView where text was changed delegate?.update ParagraphCell(self, rep: textView.text) } }

tommybananas · Accepted Answer · 2016-05-10 07:44:02Z

You need to add answerField.delegate = self in awakeFromNib to receive delegate callbacks.

override func awakeFromNib() { super.awakeFromNib() // Initialization code let borderColor : UIColor = UIColor(red: 0.85, green: 0.85, blue: 0.85, alpha: 1.0) answerField.layer.borderWidth = 0.5 answerField.layer.borderColor = borderColor.CGColor answerField.layer.cornerRadius = 5.0 answerField.delegate = self // create delegate reference }

You'll also need to add UITextViewDelegate to your class protocol declaration:

class ParagraphCell: UITableViewCell, UITextViewDelegate { }

If I do that I have this error : cannot assign value of type ParagraphCell to type UITextViewDelegate?
You need to add UITextViewDelegate to the ParagraphCell protocol declaration
class ParagraphCell: UITableViewCell, UITextViewDelegate {
Ohhhh Waww, I never saw this notation before ! it solved the problem thanks a lot my friend ! :)

Brett Donald · Accepted Answer · 2016-05-10 07:15:00Z

Yes, you need to set the delegate of the UITextView to the object where you want to put your textViewDidChange method. At the moment you have it in the ParagraphCell class, but it would probably make more sense to put this into your view controller instead, and make the view controller the delegate.

Rohit Pradhan · Accepted Answer · 2016-05-10 07:16:41Z

let cell = tableView.dequeueReusableCellWithIdentifier(CurrentFormTableView.CellIdentifiers.ParagraphCell, forIndexPath: indexPath) as! ParagraphCell cell.display(block) cell.selectionStyle = UITableViewCellSelectionStyle.None cell.answerField.delegate = self tableView.rowHeight = UITableViewAutomaticDimension tableView.estimatedRowHeight = 160.0 return cell

Ketan Parmar · Accepted Answer · 2016-05-10 07:19:51Z

you should use didEndEditing delegate method which is getting called after editing will complete.

You can set tag to textview as indexpath.row means row number to differentiate the textview in delegate method.

Or you can implement delegate method in custom tableviewcell class.

Better way is to implement delegate method in viewcontroller and set tag to textview in cellforrowatindexpath.

hope this will help :)

textViewDidEndEditing getting called when you finish editing of textview. like if you click on other controls or you switch to other controls from textview or you resign keyboard etc

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