Use Subclass of UITableView in UITableViewController

Question

I am using STCollapseTableView for expand/collapse tableView cells. I've integrated it through cocoapods and imported it in Bridging-Header. In my VC:

class MyVC: UITableViewController {

  override func viewDidLoad() {
    super.viewDidLoad()
    self.tableView = STCollapseTableView()
  }

}

I have assigned the tableView to be STCollapsableTableView. I am getting two issues:

self.tableView is of type UITableView and not of STCollapsableTableView.
I am not able to call the functions defined in STCollapsableTableView like - (void)openSection:(NSUInteger)sectionIndex animated:(BOOL)animated; I think that I have to subclass my current VC to be able to use these, but I am really not sure on how to do it.

I read this question, but it doesn't help me. I want to override UITableView with STCollapseTableView in MyVC and use all the methods defined in it. Also, MyVC has to be a subclass of UITableViewController because of structural dependency. Please suggest a way to achieve it.

I am using Swift 2.3

I would not subclass UITableView, rather create a data source class that implements UITableViewDataSource and UITableViewDelegate and knows about collapsing and other tasks. — vikingosegundo, Apr 11 '16 at 13:00
just because it is on github doesn't mean it is a good approach. — vikingosegundo, Apr 11 '16 at 13:02
@vikingosegundo agreed, but its still a quick and dirty solution. But thanks for the suggestion, I will try doing it. — saurabh, Apr 11 '16 at 13:03

score 0 · Answer 1 · answered Apr 11 '16 at 12:58

0

You can use a computed property in MyVC:

private var collapseTableView: STCollapseTableView {
    return tableView as! STCollapseTableView
}

You can also store it if you access it often, to avoid many casts. The rest is OK :)

answered Apr 11 '16 at 12:58

aelveon

132
1
1
9

I am getting the following error: `Could not cast value of type 'UITableView' to 'STCollapseTableView'` – saurabh Apr 12 '16 at 08:17
Can you check if `STCollapseTableView` is a subclass of `UITableView`? It shouldn't give you this error, especially since you can do `self.tableView = STCollapseTableView()`. – aelveon Apr 12 '16 at 08:21
Yes it is a subclass of `UITableView` – saurabh Apr 12 '16 at 08:23
I just did the same thing and it worked, so there must be something different on your side. You're getting this error at compile time, right? On which line? Also, does `self.tableView = STCollapseTableView()` work properly? – aelveon Apr 12 '16 at 20:08
Its fine when I just declare it as above. But it crashes once I try to do this: `collapseTableView.openSection(sectionToExpand, animated: true)` with the error `Could not cast value of type 'UITableView' to 'STCollapseTableView'` – saurabh Apr 13 '16 at 07:32
It looks like you're trying to call `openSection` before setting `tableView` to an instance of `STCollapseTableView`. Place breakpoints on `self.tableView = STCollapseTableView()` and on `collapseTableView.openSection(sectionToExpand, animated: true)` to see where it stops first. – aelveon Apr 13 '16 at 07:51

dilip chaurasiya · Answer 2 · 2016-04-11T16:03:05.680

0

In storyboard go to your tableViewController click on tableView of your tableViewController go to Identity Inspector and enter STCollapseTableView in the class field.

After this you should be good.

edited Apr 11 '16 at 16:03

answered Apr 11 '16 at 14:38

dilip chaurasiya

23
4

I am not using storyboard. – saurabh Apr 11 '16 at 16:24

score 0 · Answer 3 · edited May 23 '17 at 12:10

0

You'll want to override the loadView method. Check out the swift example given here https://stackoverflow.com/a/32107450/2741745

edited May 23 '17 at 12:10

Community

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answered Oct 05 '16 at 20:45

Eric Alford

926
7
11

Use Subclass of UITableView in UITableViewController

3 Answers3