How to turn off adjusting large titles by UITableView in iOS 11?

问题

There's this large titles feature in iOS 11 that shows large title when the UITableViewController's table is scrolled to top, and gets collapsed to standard small title when the user scrolls the table away from top. This is standard behavior. I need the navigation controller to behave a bit differently - I need to always show the large title. How to achieve this?

Following code does not help, it still collapses when scrolled.

navigationController?.navigationBar.prefersLargeTitles = true
navigationItem.largeTitleDisplayMode = .always

回答1:

I've achieved it unintentionally when embedded UITableViewController inside UIViewController.

I'm not sure whether it is an Apple's bug or intended behavior.

So stack is as simple as UINavigationController -> UIViewController(used as container) -> UITableViewController

Here is sample of view controller with embedded UITableViewController fullscreen

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    var vc = UITableViewController(style: .plain)
    var array: [String] = []

    override func viewDidLoad() {
        super.viewDidLoad()

        vc.view.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(vc.view)
        view.addConstraint(view.leadingAnchor.constraint(equalTo: vc.view.leadingAnchor))
        view.addConstraint(view.rightAnchor.constraint(equalTo: vc.view.rightAnchor))
        view.addConstraint(view.safeAreaLayoutGuide.topAnchor.constraint(equalTo: vc.view.topAnchor))
        view.addConstraint(view.bottomAnchor.constraint(equalTo: vc.view.bottomAnchor))

        vc.tableView.delegate = self
        vc.tableView.dataSource = self

        array = "0123456789".characters.map(String.init)
        vc.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "identifier")

        title = "Title"
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return array.count
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "identifier", for: indexPath)
        cell.textLabel?.text = array[indexPath.row]
        return cell
    }
}

Here is the result

Hope it helps.

P.S. Surprisingly, my current problem is that I don't know how to get collapsing behavior with such architecture :)

来源：https://stackoverflow.com/questions/46506401/how-to-turn-off-adjusting-large-titles-by-uitableview-in-ios-11

标签

ios

swift

uitableview

ios11