ios - 未调用 cellForRowAt 但正在调用 numberOfSection 和 numberOfRowsInSection

Question

我的代码:

//Adding Destination VC as subview in my current view's view container
let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let viewController = storyboard.instantiateViewController(withIdentifier: "DestinationViewControllerID")
         containerView.addSubview(viewController.view)
        viewController.didMove(toParentViewController: self)

//Now implementing Table view in the destination vc

class DestinationViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

 var tableView = UITableView()
    var tableData = ["Beach", "Clubs", "Chill", "Dance"]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        let screenBounds = UIScreen.main.bounds
        let rect = CGRect(x: 0, y: 0, width: screenBounds.width, height: screenBounds.height)
        tableView = UITableView(frame: rect, style: UITableViewStyle.plain)
        tableView.dataSource = self
        tableView.delegate = self
        tableView.backgroundColor = UIColor.blue

        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "my")

        view.addSubview(tableView)

        tableView.reloadData()
    }

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "my", for: indexPath)
        cell.textLabel?.text = "This is row \(tableData[indexPath.row])"

        return cell
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 4//tableData.count
    }
}

如果我将目标 viewController 设置为 Storyboard中的初始 vc，那么一切正常。但是如果在容器 View 中添加为 subview ，则不会调用 cellForRowAt 方法，但会调用 numberOfSection 和 numberOfRowsInSection。

有没有人有什么解决办法？

Answer 1

在 subview 之前添加self.addChildViewController(viewController)

 let storyboard = UIStoryboard(name: "Main", bundle: nil)
 let viewController = storyboard.instantiateViewController(withIdentifier: "DestinationViewControllerID")

 self.addChildViewController(viewController)
 containerView.addSubview(viewController.view)
 viewController.didMove(toParentViewController: self)