Event_Handler of the Done button of a picker

Question

I have a xamarin picker with a list of items and I want to remove the picker when the "done" button is pressed on iPhone and "Oke" button on android.
I have the code to remove the picker. But i don't know what event_Handler that might by.

Code:

Picker picker = new Picker
    {
        Title = "What's in the slot?",
        VerticalOptions = LayoutOptions.CenterAndExpand
        //HorizontalOptions = LayoutOptions.Center 

    };

private void Displaypickerview(int row, int column)
    {
        if (status == "filling board")
        {
            foreach (string text in pickerText)
            {


picker.Items.Add(text);
        }
        foreach (string ore in oreLevels)
        {
            picker.Items.Add(ore);
        }


        picker.SelectedIndexChanged += (sender, args) =>
        {
            if (picker.SelectedIndex == -1)
            {

            }
            else
            {
                //change value of cell and button
                Picker picker = (Picker)sender;
                int index = picker.SelectedIndex;

                if (index < pickerText.Length)
                {
                    board[row, column].Text = pickerText[index - 1];
                }
                else {
                    board[row, column].Text = oreLevels[index - 1 - pickerText.Length];
                }
            }
        };
    }
    else if (status == "choosing item")
    {

    }

}

Example of what it looks like on iPhone:

Answer 1

There is now a platform specific configuration option that lets you enable this on iOS.

You specify a PickerMode on a specific picker to only select once someone hits done on iOS.

<ContentPage ...
             xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core">
    <StackLayout Margin="20">
        <Picker ... Title="Select a monkey" ios:Picker.UpdateMode="WhenFinished">
          ...
        </Picker>
        ...
    </StackLayout>
</ContentPage>

The Picker.On<iOS> method specifies that this platform-specific will only run on iOS. The Picker.SetUpdateMode method, in the Xamarin.Forms.PlatformConfiguration.iOSSpecific namespace, is used to control when item selection occurs, with the UpdateMode enumeration providing two possible values:

Immediately – item selection occurs as the user browses items in the Picker. This is the default behavior in Xamarin.Forms.

WhenFinished – item selection only occurs once the user has pressed the Done button in the Picker.

Read docs for more info on control. https://docs.microsoft.com/sr-latn-rs/xamarin/xamarin-forms/platform/ios/picker-selection