Increase the height of the cell

Question

I have a UITableViewCell. Inside of the cell I have UILabel and UIButton, when user clicks the button the text expands but cell doesn't. So I want the cell to increase it's height with the label.

I have tried this code but it giving me a crash (unexpectedly found nil)

tableView.reloadRows(at: [IndexPath(row: 0, section: 0)], with: .fade)

tried this one also, again crash

tableView.rowHeight = cellHeightNumber

So basically I want it to work like this

Before expanding:

After expanding:

Turn on exception breakpoints in Xcode (see here: http://stackoverflow.com/questions/17802662/exception-breakpoint-in-xcode), and then you can figure out where your crash happens. That may help to solve your problem. — koen, Feb 06 '17 at 16:25
Can you post the actual crash log? This will help diagnose as to what's going wrong and will give some context as to the direction you should take. — Pratik Patel, Feb 06 '17 at 16:27
Possible duplicate of [Using Auto Layout in UITableView for dynamic cell layouts & variable row heights](http://stackoverflow.com/questions/18746929/using-auto-layout-in-uitableview-for-dynamic-cell-layouts-variable-row-heights) — dahiya_boy, Feb 06 '17 at 16:41
It crashes in **reloadRows** and says **fatal error: unexpectedly found nil while unwrapping an Optional value** @PratikPatel — Asilbek Yokubov, Feb 06 '17 at 17:09
Please share the code where that error occurs in your question. — koen, Feb 06 '17 at 17:29
First of all share your code work and storyboard constraints. Second, use UITableViewAutomaticDimension for row height. Third, use delegate method not property. — dahiya_boy, Feb 06 '17 at 17:38
Reason of crash : you forcly unwrapping the Nil object. Check the line of crash, your object probably nil. — dahiya_boy, Feb 06 '17 at 17:40

score 0 · Answer 1 · answered Feb 06 '17 at 18:55

I can give you two solutions:

Ditch the reloadRows and use the reloadData instead, like so: tableView.reloadData()

Wrap your reloadRows between the beginUpdates and endUpdates, like so:

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.beginUpdates()
    // Your reloadRows codes here
    tableView.endUpdates()
}

score 0 · Answer 2 · answered Feb 06 '17 at 21:56

You should use

UITableViewAutomaticDimension

provides a solution for displaying dynamic content. Use below code in viewDidLoad:

tableView.estimatedRowHeight = YourTableViewHeight tableView.rowHeight = UITableViewAutomaticDimension

Use this link : http://www.appcoda.com/self-sizing-cells/

Also set number of line 0 for label in table cell.

Hope it helps. :)

Increase the height of the cell

2 Answers2