How to update height of the cell with UITableViewAutomaticDimension?

Question

I have a UITextView in a tableViewCell, and using the iOS 8 provided UITableViewAutomaticDimension approach listed here.

If user add new line to UITextView, and so textView, cell height should increase, how can I update height?

Tried:

cell.layoutIfNeeded()
cell.setNeedsUpdateConstraints()

These does not work.

If I reload cell, like

tableView.reloadRowsAtIndexPaths([iindexPath], withRowAnimation: .None)

this works, but then I need to deal with resign and show keyboard. I would avoid it. Any workaround?

score 8 · Answer 1 · answered Sep 10 '15 at 14:30

8

need to add following method:

func textViewDidChange(textView: UITextView) {

    tableView.beginUpdates()
    tableView.endUpdates()
}

it will update constraints without reloading tableview

answered Sep 10 '15 at 14:30

János

32,867
38
193
353

This answer works without table view reload. Tested in iOS9. – nacross Sep 12 '16 at 04:23
This works, as well, when changing the height constraint of a **view**, instead of a textView. Tested in *iOS10*. – Thecafremo Sep 26 '16 at 16:07

score 0 · Answer 2 · answered Sep 10 '15 at 10:16

0

After sometime textView will start scrolling to make increase it height on new line ever time you need to implement textViewDidChangeText: method and increase its height by calculating height for text.

To use UITableViewAutomaticDimension you need to add constraints to subviews from top to bottom, I think you should also create and IBOutlet for height constraint of textView and set constant value on textViewDidChangeText method, in that case tableViewCell height will change dynamically.

answered Sep 10 '15 at 10:16

Adnan Aftab

14,377
4
45
54

If I set height constraint, it will stop UITableViewAutomaticDimension to work – János Sep 10 '15 at 13:27
then increase its height by setting the frame – Adnan Aftab Sep 10 '15 at 15:28

How to update height of the cell with UITableViewAutomaticDimension?

2 Answers2

Linked