[Bug] [iOS]SwipeView not working on Grouped ListView

[Rabosa616]

Description

Using Swipeview in a grouped listview not working.
Left or right items are show 0 or only 1 time on the child items.

Steps to Reproduce

This is my list view implementation that works perfect with android
Alerts.xaml

<ListView.GroupHeaderTemplate>







</ListView.GroupHeaderTemplate>
<ListView.ItemTemplate>



<SwipeView.LeftItems>



</SwipeView.LeftItems>

<Grid.ColumnDefinitions>


</Grid.ColumnDefinitions>

                        </SwipeView>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

Models:
public class GroupedAlertResponseDto : ObservableCollection
{
public DateTime Date { get; set; }

}

public class AlertResponseDto
{
///

/// Gets or sets the field identifier.
///

/// The field identifier.
public Guid FieldId { get; set; }

    /// <summary>
    /// Gets or sets the sensor identifier.
    /// </summary>
    /// <value>The sensor identifier.</value>
    public Guid SensorId { get; set; }

    /// <summary>
    /// Gets or sets the alert identifier.
    /// </summary>
    /// <value>The alert identifier.</value>
    public Guid AlertId { get; set; }

    /// <summary>
    /// Gets or sets the date.
    /// </summary>
    /// <value>The date.</value>
    public DateTime Date { get; set; }

    /// <summary>
    /// Gets or sets if the alert is readed
    /// </summary>
    /// <value>Is Readed</value>
    public bool IsReaded { get; set; }

    /// <summary>
    /// Gets or sets the message.
    /// </summary>
    /// <value>The message.</value>
    public string Message { get; set; }
}

• Version with issue: 4.7.0.813-pre2

• Last known good version:

• IDE:

  • Microsoft Visual Studio Enterprise 2019 Preview Version 16.6.0 Preview 6.0
  • Microsoft Visual Studio for Mac Enterprise 8.6 preview (8.6 build 4446)

• Platform Target Frameworks:

  • iOS: 12.4, 13.5
  • Android: 9.0

• Nuget Packages:
  Xamarin.Forms
  Xamarin.Forms.Maps

• Affected Devices:
  Any iOS device

[jsuarezruiz]

@Rabosa616 I have tried to reproduce the issue without success.

This is my sample (is a sample from the Xamarin.Forms Samples repository adding SwipeView)

Issue1908.zip

I tested with Xamarin.Forms 4.6 and 4.7-pre2, could you attach a repro sample?

[Rabosa616]

Hi @jsuarezruiz
try to use this collection:

grouped = new ObservableCollection<GroupedVeggieModel>();
var veggieGroup = new GroupedVeggieModel() { LongName = "vegetables", ShortName = "v" };
var fruitGroup = new GroupedVeggieModel() { LongName = "fruit", ShortName = "f" };
var veggie1Group = new GroupedVeggieModel() { LongName = "vegetables1", ShortName = "v1" };
var fruit1Group = new GroupedVeggieModel() { LongName = "fruit1", ShortName = "f1" };
var veggie2Group = new GroupedVeggieModel() { LongName = "vegetables2", ShortName = "v2" };
var fruit2Group = new GroupedVeggieModel() { LongName = "fruit2", ShortName = "f2" };
veggieGroup.Add(new VeggieModel() { Name = "celery", IsReallyAVeggie = true, Comment = "try ants on a log" });
veggieGroup.Add(new VeggieModel() { Name = "tomato", IsReallyAVeggie = false, Comment = "pairs well with basil" });
veggieGroup.Add(new VeggieModel() { Name = "zucchini", IsReallyAVeggie = true, Comment = "zucchini bread > bannana bread" });
veggieGroup.Add(new VeggieModel() { Name = "peas", IsReallyAVeggie = true, Comment = "like peas in a pod" });
fruitGroup.Add(new VeggieModel() { Name = "banana", IsReallyAVeggie = false, Comment = "available in chip form factor" });
fruitGroup.Add(new VeggieModel() { Name = "strawberry", IsReallyAVeggie = false, Comment = "spring plant" });
fruitGroup.Add(new VeggieModel() { Name = "cherry", IsReallyAVeggie = false, Comment = "topper for icecream" });

veggie1Group.Add(new VeggieModel() { Name = "celery", IsReallyAVeggie = true, Comment = "try ants on a log" });
veggie1Group.Add(new VeggieModel() { Name = "tomato", IsReallyAVeggie = false, Comment = "pairs well with basil" });
veggie1Group.Add(new VeggieModel() { Name = "zucchini", IsReallyAVeggie = true, Comment = "zucchini bread > bannana bread" });
veggie1Group.Add(new VeggieModel() { Name = "peas", IsReallyAVeggie = true, Comment = "like peas in a pod" });
fruit1Group.Add(new VeggieModel() { Name = "banana", IsReallyAVeggie = false, Comment = "available in chip form factor" });
fruit1Group.Add(new VeggieModel() { Name = "strawberry", IsReallyAVeggie = false, Comment = "spring plant" });
fruit1Group.Add(new VeggieModel() { Name = "cherry", IsReallyAVeggie = false, Comment = "topper for icecream" });

veggie2Group.Add(new VeggieModel() { Name = "celery", IsReallyAVeggie = true, Comment = "try ants on a log" });
veggie2Group.Add(new VeggieModel() { Name = "tomato", IsReallyAVeggie = false, Comment = "pairs well with basil" });
veggie2Group.Add(new VeggieModel() { Name = "zucchini", IsReallyAVeggie = true, Comment = "zucchini bread > bannana bread" });
veggie2Group.Add(new VeggieModel() { Name = "peas", IsReallyAVeggie = true, Comment = "like peas in a pod" });
fruit2Group.Add(new VeggieModel() { Name = "banana", IsReallyAVeggie = false, Comment = "available in chip form factor" });
fruit2Group.Add(new VeggieModel() { Name = "strawberry", IsReallyAVeggie = false, Comment = "spring plant" });
fruit2Group.Add(new VeggieModel() { Name = "cherry", IsReallyAVeggie = false, Comment = "topper for icecream" });

grouped.Add(veggieGroup);
grouped.Add(fruitGroup);
grouped.Add(veggie1Group);
grouped.Add(fruit1Group);
grouped.Add(veggie2Group);
grouped.Add(fruit2Group);

This will not fit on the screen and will force to show the scroll.
I think is this the moment where is not working correct.

PS: Thanks for the quick response!

[jsuarezruiz]

Thanks for the answer @Rabosa616, I have found the problem.

[Rabosa616]

Hi @jsuarezruiz
I´m glad that I could help you to find the issue!

Let me know when I can test it.

Kind regards.

[Rabosa616]

Thanks so much!
I will try next week on the iPhone when I get the new nugets

[TobiasJoergensen]

I had related issue which the newest Xamarin update seems to have resolved.