Expand uitableview cell height while typing and avoid keyboard - swift

Question

I have a tableview with textview. I want to set tableviewcell height according to the content of uitextview while typing and also if keyboard hides uitexview scroll table.
Below is the code for expanding cell height according to the content
func updateCellHeight(indexPath: NSIndexPath, comment: String,textview: UITextView) {
let tempDict = arrayTexts[indexPath.row] as! NSMutableDictionary
tempDict.setValue(comment, forKey: "content")
arrayTexts[indexPath.row] = tempDict
self.tblFields.beginUpdates()
self.tblFields.endUpdates()
}
The above code is working but its not avoiding keyboard
Below code is for avoiding keyboard
func textviewBeginEditing(textview: UITextView) {
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardHeight, right: 0)
self.tblFields.contentInset = contentInsets
self.tblFields.scrollIndicatorInsets = contentInsets
// If active text field is hidden by keyboard, scroll it so it's visible
// Your app might not need or want this behavior.
var aRect = self.view.frame
aRect.size.height -= keyboardHeight
if !aRect.contains(textview.frame.origin) {
self.tblFields.scrollRectToVisible(textview.frame, animated: false)
}
}
The above code sometimes avoids keyboard and sometimes not but the tableview continuously scrolls up on typing and is not working properly. Whats my mistake?

Answer 1

Remove the code from textviewBeginEditing function and add following code
func updateCellHeight(indexPath: NSIndexPath, comment: String, textview: UITextView) {
let tempDict = arrayTexts[indexPath.row] as! NSMutableDictionary
tempDict.setValue(comment, forKey: "value")
arrayTexts[indexPath.row] = tempDict
if textview.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize).height != textview.frame.size.height {
UIView.setAnimationsEnabled(false)
self.tblFields.beginUpdates()
self.tblFields.endUpdates()
UIView.setAnimationsEnabled(true)
}
}