Add PullToRefresh to UITableView

Adding UIRefreshControl to UITableView

public override async void ViewDidLoad(){
base.ViewDidLoad();
// Perform any additional setup after loading the view, typically from a nib.

Title = "Pull to Refresh Sample";
table = new UITableView(new CGRect(0, 20, View.Bounds.Width, View.Bounds.Height - 20));
//table.AutoresizingMask = UIViewAutoresizing.All;
tableItems = new List<TableItem>();
tableItems.Add(new TableItem("Vegetables") { ImageName = "Vegetables.jpg" });
tableItems.Add(new TableItem("Fruits") { ImageName = "Fruits.jpg" });
tableItems.Add(new TableItem("Flower Buds") { ImageName = "Flower Buds.jpg" });
tableItems.Add(new TableItem("Legumes") { ImageName = "Legumes.jpg" });
tableItems.Add(new TableItem("Tubers") { ImageName = "Tubers.jpg" });
tableSource = new TableSource(tableItems);
table.Source = tableSource;

await RefreshAsync();

AddRefreshControl();

Add(table);
table.Add(RefreshControl);
}

async Task RefreshAsync()
{
// only activate the refresh control if the feature is available
if (useRefreshControl)
    RefreshControl.BeginRefreshing();

if (useRefreshControl)
    RefreshControl.EndRefreshing();

    table.ReloadData();
}

#region * iOS Specific Code
// This method will add the UIRefreshControl to the table view if
// it is available, ie, we are running on iOS 6+
void AddRefreshControl()
{
if (UIDevice.CurrentDevice.CheckSystemVersion(6, 0))
{
    // the refresh control is available, let's add it
    RefreshControl = new UIRefreshControl();
    RefreshControl.ValueChanged += async (sender, e) =>
    {
        tableItems.Add(new TableItem("Bulbs") { ImageName = "Bulbs.jpg" });
        await RefreshAsync();
    };
    useRefreshControl = true;
   }
}
#endregion

Remarks

Object References:

UITableView table;
TableSource tableSource;
bool useRefreshControl = false;
UIRefreshControl RefreshControl;
List tableItems;

TableSource and TableItem are user-defined classes

For the complete sample you can fork: https://github.com/adiiaditya/Xamarin.iOS-Samples/tree/master/PullToRefresh