如何通过UIButton关联UIPickerView选中行与对应TableView（Swift）

Got it, let's get this sorted for you! You've already got your UIPickerView set up with the three content categories, now we just need to link that selection to a corresponding TableView when the button is tapped. Here's a step-by-step Swift implementation tailored to your code:

First, drag a UIButton onto your storyboard, then create an IBOutlet and IBAction for it in your ViewController:

@IBOutlet weak var showTableButton: UIButton!

@IBAction func didTapShowTable(_ sender: UIButton) {
    // Selection logic will go here
}

Since your code snippet cut off, let's make sure the picker's core data source/delegate methods are fully implemented:

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITableViewDataSource, UITableViewDelegate {
    
    @IBOutlet weak var Picker1: UIPickerView!
    @IBOutlet weak var showTableButton: UIButton!
    // Add a TableView outlet if you're using one in the same VC
    @IBOutlet weak var contentTableView: UITableView!
    
    let categoryArray = ["G: Classroom friendly", "PG-13: Swear words OK(no sexual innuendo)", "R: Anything goes!"]
    // Store data for the selected table view
    var currentTableContent: [String] = []

    override func viewDidLoad() {
        super.viewDidLoad()
        Picker1.delegate = self
        Picker1.dataSource = self
        contentTableView.isHidden = true // Hide table initially
        contentTableView.delegate = self
        contentTableView.dataSource = self
    }

    // MARK: UIPickerView DataSource
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return categoryArray.count
    }

    // MARK: UIPickerView Delegate
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return categoryArray[row]
    }

Now add the logic to the button action to load the right content based on the picker's selected row. We'll cover two common scenarios:

Scenario 1: Using Separate TableView Controllers #

If you've created distinct TableViewControllers for each category (with storyboard IDs set), use this code to navigate to the correct VC:

@IBAction func didTapShowTable(_ sender: UIButton) {
    let selectedRow = Picker1.selectedRow(inComponent: 0)
    var targetVC: UIViewController!

    switch selectedRow {
    case 0:
        targetVC = storyboard?.instantiateViewController(withIdentifier: "ClassroomFriendlyVC") as! ClassroomFriendlyTableViewController
    case 1:
        targetVC = storyboard?.instantiateViewController(withIdentifier: "PG13VC") as! PG13TableViewController
    case 2:
        targetVC = storyboard?.instantiateViewController(withIdentifier: "RContentVC") as! RContentTableViewController
    default:
        return
    }

    // Push or present based on your navigation setup
    navigationController?.pushViewController(targetVC, animated: true)
    // Or use present(targetVC, animated: true) if no navigation controller
}

Scenario 2: Using a Single TableView in the Same ViewController #

If you want to show/hide one TableView and swap its content, update the button action like this:

@IBAction func didTapShowTable(_ sender: UIButton) {
    let selectedRow = Picker1.selectedRow(inComponent: 0)

    // Populate content based on picker selection
    switch selectedRow {
    case 0:
        currentTableContent = ["Math Worksheets", "Science Experiments", "Reading Comprehension"]
    case 1:
        currentTableContent = ["Movie Reviews", "Game Guides", "Tech Tutorials"]
    case 2:
        currentTableContent = ["Unfiltered Podcasts", "Adult Humor Blogs", "Mature Discussion Threads"]
    default:
        currentTableContent = []
    }

    // Show and refresh the table view
    contentTableView.isHidden = false
    contentTableView.reloadData()
}

// MARK: UITableView DataSource
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return currentTableContent.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "ContentCell", for: indexPath)
    cell.textLabel?.text = currentTableContent[indexPath.row]
    return cell
}

Just make sure your TableView has a reusable cell with the identifier "ContentCell" set in the storyboard!

内容的提问来源于stack exchange，提问作者CDRom