What methods are required to display data in a UITableView?

Sources & Resources

Main Source: 🔗 Ace the iOS Interview

Additional Sources:

Further Reading:

TL/DR

Every iOS interview I've done has dealt with UITableViews in some capacity. Most often, it will involve hitting some API and showing the response in a UITableView like we did in Assessment #1.

As you prepare for your interviews, you should aim to be able to create a UITableView with custom UITableViewCell swithout referring to any documentation.Ideally, this set up process should become second nature to you.

Since this topic will be a constant in all of your interviews, knowing precisely what functions are necessary and what their respective inputs, outputs, and method signatures are is crucial.

Here are the only required UITableViewDataSource methods:

// Return the number of rows for the table.
override func tableView(_ tableView: UITableView,
    numberOfRowsInSection section: Int) -> Int {
    return 0
}

// Provide a cell object for each row.
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    // Fetch a cell of the appropriate type.
    let cell = tableView.dequeueReusableCell( withIdentifier:"CellIdentifier", for: indexPath)

    // Configure the cell's contents.
    cell.textLabel!.text = "Cell text"
    return cell
}