How to read cell value long press gesture on table cell in xamarin.ios? - uitableview

Question

I have Tableview with longpress cell.
I can't read the data inside the cell which have been long pressed.
rowselected() method is not the right way because I must select cell first. I didn't want to select cell first.
This is my table adapter class:
internal class AbsetAdapterClass : UITableViewSource
{
private List<benood2.AbsentClass> absentList;
public AbsetAdapterClass(List<benood2.AbsentClass> absentList)
{
this.absentList = absentList;
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
var cell = (TableClass)tableView.DequeueReusableCell("cell_id", indexPath);
var AbsentDay = absentList[indexPath.Row];
var longPressGesture = new UILongPressGestureRecognizer(LongPressMethod);
cell.AddGestureRecognizer(longPressGesture);
cell.UpdateCell(AbsentDay);
return cell;
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return absentList.Count;
}
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
PublicClass.ReadCellValue = "";
var GetCellValue = absentList[indexPath.Row].BandValue;
tableView.DeselectRow(indexPath, true);
}
void LongPressMethod(UILongPressGestureRecognizer gestureRecognizer)
{
if (gestureRecognizer.State == UIGestureRecognizerState.Began)
{
Toast.MakeToast("I want to read the cell data ").SetTitle(PublicClass.ReadCellID.ToString()).SetDuration(ToastDuration.Regular).Show();
}
}
}
I can't get the long press cell data

Answer 1

You could attach LongPressGesture to the UITableView instead of the UITableViewCell.
You could try the following code (Note: i made my demo based on the Xamarin.iOS official samples):
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
table = new UITableView(new CGRect(0, 0, width, height));
...
// add longPressGesture to the tableView
var longPressGesture = new UILongPressGestureRecognizer(LongPressMethod);
table.AddGestureRecognizer(longPressGesture);
...
}
Then for LongPressMethod:
void LongPressMethod(UILongPressGestureRecognizer gestureRecognizer)
{
var p = gestureRecognizer.LocationInView(table);
var indexPath = table.IndexPathForRowAtPoint(p);
if (indexPath == null)
{
Console.WriteLine("Long press on table view but not on a row.");
}
else if (gestureRecognizer.State == UIGestureRecognizerState.Began)
{
Console.WriteLine("Long press on {0} row", indexPath.Row);
//you could get the selectedItem through the Row index
}
}
For more info, you could refer to Working with Tables and Cells in Xamarin.iOS.
Hope it works for you.