Swift: How to access the cells within a UITableView - swift

Question

I currently have UITableView that has one UITableViewCell within it. Within my code I created a button over this cell. When that button is pressed, the cells within it expand.
How would I go about making something expand when one of those cells are selected? Would I need to put a UITableView within the cell?

Answer 1

This is what I would do if I needed to bang something out in a hurry. Let each vegetable occupy its own table section, then expand or contract the section when the user toggles:
// We need some kind of data model.
class Vegetable {
init(name: String, facts: [String]) {
self.name = name
self.facts = facts
}
let name: String
let facts: [String]
var isShown: Bool = false // This flag gets toggled, which is why I've defined it as a class.
}
// And a table view controller configured for dynamic (not static!) cells. Create this in a storyboard, and change the UITableViewControllers class to VeggieTable.
class VeggieTable: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
veggieData = [Vegetable(name: "Tomato", facts: ["Number: 15", "Red Colored"]),
Vegetable(name: "Lettuce", facts: ["Good with peanut butter", "Green", "Crunchy snack"])] // etc.
}
var veggieData: [Vegetable]!
override func numberOfSections(in tableView: UITableView) -> Int {
return veggieData.count
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let veg = veggieData[section]
return veg.isShown ? veg.facts.count + 1 : 1
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
let veg = veggieData[indexPath.section]
switch indexPath.row {
case 0:
cell.textLabel?.text = veg.name
default:
cell.textLabel?.text = veg.facts[indexPath.row - 1]
}
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let veg = veggieData[indexPath.section]
// Toggle the is shown flag:
veg.isShown = !veg.isShown
tableView.deselectRow(at: indexPath, animated: true)
// TODO: replace reloadData() with sophisticated animation.
// tableView.beginUpdates()
// tableView.insertRows() / deleteRows() etc etc.
// tableView.endUpdates()
tableView.reloadData()
}
}
Eventually you'd add table animations to make the rows appearing look smooth etc.
Hope that helps.