Programmatic Beginrefreshing() on iOS11 Has Problems with Largetitles Mode

Prefer Large Titles and RefreshControl not working well

At the end what worked for me was:

• In order to fix the RefreshControl progress bar disappearing bug with large titles:

  self.extendedLayoutIncludesOpaqueBars = true
  

• In order to fix the list offset after refreshcontrol.endRefreshing():

  let top = self.tableView.adjustedContentInset.top
  let y = self.refreshControl!.frame.maxY + top
  self.tableView.setContentOffset(CGPoint(x: 0, y: -y), animated:true)
  

UIRefreshControl renders behind UINavigation w/ Large Titles

It looks like you are setting the refresh control after the large navigation has been configured.

Try changing the order to something like this -

  override func viewDidLoad() {
    super.viewDidLoad()

    load()

    configureTableView()
    configureUI()
  }
.......
  func configureTableView() {
    tableView.backgroundColor = .usingHex("fafafa")
    tableView.tableFooterView = .init()
    tableView.contentInsetAdjustmentBehavior = .always
    tableView.refreshControl = .init()
  }

  func configureUI() {
    navigationController?.navigationBar.prefersLargeTitles = true
    navigationItem.title = "Latest content"
  }

Xamarin iOS RefreshControl is stuck

It looks like the issue is related to the Refresh(); method being synchronous. You'll need to make this operation happen in the background so that the UI thread is free to provide the animation for the RefreshControl. For example:

private async void HandleValueChanged(object sender, EventArgs e)
{
    ordersCollectionView.RefreshControl.BeginRefreshing();
    ordersCollectionView.RefreshControl.AttributedTitle = new NSAttributedString("Refreshing",
        new UIStringAttributes()
        {
            ForegroundColor = UIColor.Blue,
            KerningAdjustment = 5
        });

    // await a Task so that operation is done in the background
    await Refresh();
    ordersCollectionView.RefreshControl.EndRefreshing();
}

// Marked async and Task returning
private async Task Refresh()
{
    var viewModel = (OrdersViewModel)DataContext;
    // Need to update this method to be a Task returning, async method.
    await viewModel.OnReloadData();
}

The above code refactors what you had to use async/await and Tasks. You may need to refactor some more of your code to make that work, including the OnReloadData() method.

There are lots of resources for getting started with Tasks, async and await. I can start you off with this reference from the Xamarin blog.

---

Related Topics