How to set dynamic table height based on table row?

Question

I am facing table height issue at run time.

I have a Scroll View added to my Super view. Over the Scroll View, I have added a UIView in the top then after UIView I have placed one UITableView (scrollEnabled false) and again have added a UIView in the bottom of my UITableView.

Problem: I want user to do a single scroll in the screen, so I have disabled table view scrolling property. Now my problem is I am fetching table array data from server so after getting data from server, my viewDidLayoutSubviews method is not getting called where I have wrote the table height logic. And when I am re-loading the same screen then everything is working fine.

Here is my code :

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()

        if devicesArray.count != 0{
            viewDeviceList.frame = CGRect(x: viewDeviceList.frame.origin.x, y: viewDeviceList.frame.origin.y, width: viewDeviceList.frame.size.width, height: tableDeviceList.contentSize.height)

            tableDeviceList.reloadData()
        }

    }

Can anyone suggest me on this. Thank you.

So you want a table view that grows and shrinks dynamically depending on the rows? If so, you can do something similar to this: https://stackoverflow.com/a/55068380/10473781 — IloneSP, Nov 28 '19 at 12:47
when you get your data from server : try, tableView.reloadData() and then self.view.layoutIfNeeded() — Keshu R., Nov 28 '19 at 12:48
Hi @KeshuRaiI have added the self.view.layoutIfNeeded() below to reloading my tableview. But the height of table view is incorrect. — Anand Gautam, Nov 28 '19 at 12:52
I would have preferred this structure: https://imgur.com/X2jybHZ . This way you don't need to worry about height and scroll view. Tableview will take care of everything. — Keshu R., Nov 28 '19 at 12:54
Okay, Can you please check my logic of viewDidLayoutSubviews? Am I correct? — Anand Gautam, Nov 28 '19 at 12:57
https://imgur.com/a/qjABDqK this is when I am fetching table data from server. — Anand Gautam, Nov 28 '19 at 13:00
try this -> https://medium.com/infancyit/a-simple-solution-for-self-sizing-tableview-with-auto-resizing-cell-a3f82c4a1b34 — Keshu R., Nov 28 '19 at 13:04
@AnandGautam You can try with tableView height constraint. tableHeightConstraint = rowHeight * arrayCount — Abdul Hoque Nuri, Nov 28 '19 at 13:22
Hi @A.H.NuriI have added my table view to a UIView. And I am setting up to viewHeightConstraints.constant = tableView.contentSize.height — Anand Gautam, Nov 28 '19 at 13:25
But very first time my tableView.contentSize value is incorrect, — Anand Gautam, Nov 28 '19 at 13:25
I can't set tableHeightConstraint = rowHeight * arrayCount, as my rowHeight values are changing at rum time. — Anand Gautam, Nov 28 '19 at 13:26
@AnandGautam Please check my Answer. I tried with observer. That's working perfectly. — Abdul Hoque Nuri, Nov 28 '19 at 13:55

score 0 · Accepted Answer · answered Nov 28 '19 at 13:54

Please try with below code and let me know. I'm working with observer and its working perfectly.

//MARK:- Add this observer into your View/Controlloer
        override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
            self.transactionTableViewHeightConstraints.constant = transactionTableView.contentSize.height
        }
//MARK:- Fetch TableListData
    func updateTableViewHeightAfterAPICall(){
            self.transactionTableView.addObserver(self, forKeyPath: "contentSize", options: [], context: nil)
            self.transactionTableView.reloadData()
            UIView.animate(withDuration: 0.5) {
                self.view.layoutIfNeeded()
            }
        }

score 0 · Answer 2 · answered Nov 29 '19 at 07:30

0

Create outlet for tableView height constraint like this

@IBOutlet weak var tableViewHeightConstraint: NSLayoutConstraint!

add this line

self.tableView.reloadData()
self.tableViewHeightConstraint.constant = self.tableView.contentSize.height

answered Nov 29 '19 at 07:30

Gowri G

420
4
18

How to set dynamic table height based on table row?

2 Answers2