How to implement multiple UITableView in single UIViewController using Swift?

Question

I have no idea what is wrong with my code. I researched around the Internet could not find a way to fix this.

I have two UITableView in same UIViewController. They both have their own UITableView classes and their identifiers assigned properly from the MainStoryboard (checked multiple times, connections are solid.)

inside viewDidLoad()

    tableView.delegate = self
    tableView.dataSource = self
    tableView.register(UITableViewCell.self, forCellReuseIdentifier: "PortfolioCell")
    barTableView.delegate = self
    barTableView.dataSource = self
    barTableView.register(UITableViewCell.self, forCellReuseIdentifier: "BarCell")

Related code:

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if tableView == self.tableView {
        return selCur.count
    } else {
        return selCur.count
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    if tableView == self.tableView {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "PortfolioCell", for: indexPath) as? PortfolioCell else { return UITableViewCell() } 

                let noVal = selCur.count[indexPath.row].rank ?? 0
                let nameVal = selCur.count[indexPath.row].name ?? "N/A"

                cell.configureCell(no: noVal, name: nameVal)
            }
        }
        return cell

    } else {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "BarCell", for: indexPath) as? BarCell else { return UITableViewCell() }
                let noVal = selectedCurrencies[indexPath.row].rank ?? 0
                let nameVal = selectedCurrencies[indexPath.row].name ?? "N/A"

                cell.configureCell(no: noVal, name: nameVal)
            }
        }
        return cell
    }
}

I am guessing, cellForRowAt method returns regular UITableViewCell instead of the custom "PortfolioCell" or "BarCell". I also tried tableView.tag method as well and got the same result.

Thank you in advance.

Ryan · Accepted Answer · 2017-11-30 21:36:12Z

1

You have to register each cell correctly.

tableView.register(PortfolioCell.self, forCellReuseIdentifier: "PortfolioCell")

or if you have a cell with .xib

tableView.register(UINib(nibName: "PortfolioCell", bundle: nil),
                   forCellReuseIdentifier: "PortfolioCell")

If cell is in storyboard, you don't even need to register it.

edited Nov 30, 2017 at 21:36

answered Nov 30, 2017 at 21:28

Ryan

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3 Comments

Vetuka Over a year ago

Hello Ryan, thank you for the answer. After I register the cells as you shown above, now I started to get nil error inside my cell.configureCell method. This method is working properly on other VC using exact same configuration. Only difference is one VC has one tableView this one got two. Which leads me to thinking issue still continues. As you pointed out cells are in storyboard and I already set their Identifiers and Classes respectively. Any ideas?

Ryan Over a year ago

Sounds like you have created a custom cell from UIStoryboard. If so, the cell is belonged to the specific view controller. You can't really reuse the cell in different viewController. If you want use a sepcific custome cell in many view controllers, you need to create as a separate xib or programatically.

Vetuka Over a year ago

Thank you so much for all your answers. Appreciated.

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