I have UIViewController with NavigationBar that is a part of UITabController.
Inside UIViewController I have only UITableView.
NavigationBar is transparent and blurred.
TableView top constraint is to superview, so when I scroll content it goes behind navigation bar.
Problem:
loadData data triggered immediately when I start to scroll down. Right after I scroll few pixels down.
All works fine if I remove largeTitles, but with large titles it feels like refreshControl already at position when it ready to trigger .valueChanged
Also it works fine if to remove tab bar and load navigationController directly as root. But I need tabbar.
Full code:
@main
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
let window = UIWindow(frame: UIScreen.main.bounds)
window.makeKeyAndVisible()
self.window = window
window.rootViewController = TabBarController()
return true
}
}
class TabBarController: UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
let navigationController = UINavigationController(rootViewController: ViewController())
navigationController.navigationBar.prefersLargeTitles = true
viewControllers = [navigationController]
}
}
class ViewController: UIViewController {
private let tableView = UITableView()
private let refreshControl = UIRefreshControl()
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.title = "Test"
view.addSubview(tableView)
tableView.snp.makeConstraints { make in
make.edges.equalToSuperview()
}
tableView.delegate = self
tableView.dataSource = self
tableView.refreshControl = refreshControl
refreshControl.addTarget(self, action: #selector(loadData), for: .valueChanged)
}
@objc func loadData() {
print("loadData triggered")
DispatchQueue.main.asyncAfter(deadline: .now() + 3.0) {
self.refreshControl.endRefreshing()
}
}
}
extension ViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell: UITableViewCell
if let defaultCell = tableView.dequeueReusableCell(withIdentifier: "defaultCell") {
cell = defaultCell
} else {
cell = UITableViewCell(style: .value1, reuseIdentifier: "defaultCell")
}
cell.textLabel?.text = "Test"
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
10
}
}
BUT
Everything works fine if same thing done from StoryBoard:
dbyst
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