[iOS] [Slider] PointerReleased doesn't trigger

[mcocaroUX]

Current behavior

PointerReleased event is not triggering when releasing the slider

Expected behavior

PointerReleased should trigger when releasing the slider

How to reproduce it (as minimally and precisely as possible)

ReproApp.zip

1. Run the app
2. Press the slider and release it
3. Notice how event is not triggered

Workaround

As a workaround I tried using PointerExited but that wont work for me because when moving the pointer outside the slider it triggers

Works on UWP/WinUI

Yes

Environment

No response

NuGet package version(s)

<PackageVersion Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />
<PackageVersion Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.756" />
<PackageVersion Include="Microsoft.WindowsAppSDK" Version="1.4.231219000" />
<PackageVersion Include="Uno.Core.Extensions.Logging.Singleton" Version="4.0.1" />
<PackageVersion Include="Uno.Extensions.Authentication" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Authentication.WinUI" Version="3.0.19" />

<PackageVersion Include="Uno.Extensions.Configuration" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Hosting" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Hosting.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Http" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Http.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Http.Refit" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Localization" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Localization.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Logging.OSLog" Version="1.7.0" />
<PackageVersion Include="Uno.Extensions.Logging.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Navigation" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Navigation.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Navigation.Toolkit.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Reactive" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Reactive.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Serialization" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Serialization.Http" Version="3.0.19" />
<PackageVersion Include="Uno.Extensions.Serialization.Refit" Version="3.0.19" />
<PackageVersion Include="Uno.Material.WinUI" Version="4.0.6" />
<PackageVersion Include="Uno.Dsp.Tasks" Version="1.2.8" />
<PackageVersion Include="Uno.Toolkit.WinUI" Version="5.0.19" />
<PackageVersion Include="Uno.Extensions.Toolkit.WinUI" Version="3.0.19" />
<PackageVersion Include="Uno.Toolkit.WinUI.Material" Version="5.0.19" />
<PackageVersion Include="Uno.Resizetizer" Version="1.2.1" />

<PackageVersion Include="Uno.UI.Adapter.Microsoft.Extensions.Logging" Version="5.2.0-dev.24" />
<PackageVersion Include="Uno.UniversalImageLoader" Version="1.9.36" />
<PackageVersion Include="Uno.WinUI" Version="5.2.0-dev.24" />
<PackageVersion Include="Uno.WinUI.Lottie" Version="5.2.0-dev.24"/>
<PackageVersion Include="Uno.WinUI.RemoteControl" Version="5.2.0-dev.24" />
<PackageVersion Include="Xamarin.Google.Android.Material" Version="1.9.0.2" />
<PackageVersion Include="Mapsui.Uno.WinUI" Version="4.1.2" />
<PackageVersion Include="Uno.Extensions.Reactive.Messaging" Version="2.5.11" />
<PackageVersion Include="CommunityToolkit.Mvvm" Version="8.2.0" />
<PackageVersion Include="Uno.WinUI.Svg" Version="5.0.41" />
<PackageVersion Include="SkiaSharp.Views.Uno" Version="2.88.6" />

Affected platforms

iOS

IDE

Visual Studio 2022

IDE version

No response

Relevant plugins

No response

Anything else we need to know?

No response

[dr1rrb]

This might have been fixed by https://github.com/unoplatform/uno/pull/15294, could you please validate if it has been fixed in the latest version of uno?

Also, I noticed that you subscribed only the the PointerReleased event, but this can legitimately not been raised on element. You should always listen to PointerCancelled to be sure to handle all cases.

[mcocaroUX]

Hey @dr1rrb, I just tried on UNO 5.1.52 but I can still replicate the issue, same is ocurring with PointerCanceled

[jeromelaban]

@mcocaroUX can you validate using the latest prerelease build of 5.2-dev.xx?

[mcocaroUX]

Tested on 5.2.0-dev.660, issue still ocurring

[dr1rrb]

@mcocaroUX So I investigated the issue and, with latest version of uno, the behavior is the same as windows: the event is flagged as handled so the handler is not invoked. The issue is actually that you get the PointerReleasedEvent on Android (not tested on other platforms).

To get the event, you have to subscribe to handled event too using:

slider.AddHandler(PointerReleasedEvent, new PointerEventHandler(Slider_PointerReleased), handledEventsToo: true);

(works on all platforms)

-- Updating the title of the issue accordingly --

[mcocaroUX]

@dr1rrb What version did you use to test it?