Question 130941 in Xcode Question posted in
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Xcode – Segmented Control with a UITableView

I have a segmented control that is filled using an enum. I have a table view to show the data of each case. What is the proper way to handle this use-case rather than hardcoding switch-cases for numberOfRowsInSection and cellForRowAt?

let segmentedControl = UISegmentedControl(items: SegmentedControlItems.allCases.map {$0.rawValue})

private enum SegmentedControlItems: String, CaseIterable {
    case case1 = "Case1"
    case case2 = "Case2"
    case case3 = "Case3"
}

private var arr1 = [Type1]()
private var arr2 = [Type2]()
private var arr3 = [Type3]()

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    switch view?.segmentedControl.selectedSegmentIndex {
    case 0:
        return case1.count
    case 1:
        return case2.count
    case 2:
        return case3.count
    default:
        return 0
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(withIdentifier: AssetView.AssetCell.reuseIdentifier, for: indexPath) as? AssetView.AssetCell else {
        fatalError("Error trying to dequeue cell")
    }

    switch view?.segmentedControl.selectedSegmentIndex {
    case 0:
        setupCell(case1)
    case 1:
        setupCell(case2)
    case 2:
        setupCell(case3)
    default:
        return UITableViewCell()
    }

    return cell
}
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2

Answers


  1. Chosen as BEST ANSWER
    0

    Perfect article about how to use table view with different datasources. It really helped me. https://betterprogramming.pub/uitableview-sections-with-nested-types-27eabb833ad9


  2. 0

    put case1, case2, and case3 in an array. Let’s call it cases:

    let cases = [case1, case2, case3]

    Then index into that using your segmented control’s index:

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    guard let selectedItem = view?.segmentedControl.selectedSegmentIndex,
        selectedItem < cases.count else { fatalError("splat!" }
    return cases[selectedItem]
}
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