On CurrentPagechange Event of TabbedPage custom Font is not applied on title of last but one Child Page click item

Question

I have TabbedPage in MAUI 8 and API level 34 .

I have multiple tabs loading 3 on each Tab change event,

1-I have applied Font to each child Tab as mentioned https://learn.microsoft.com/en-us/answers/questions/1867067/how-to-set-fontfamily-of-title-of-each-child-of-ne

2- When CurrentPagechange Event of TabbedPage fired i was loosing font for next loaded tab

and its fixed by help mentioned here https://learn.microsoft.com/en-us/answers/questions/1879004/on-currentpagechange-event-of-tabbedpage-custom-fo

Current Issue: On going on Next tab changed by CurrentPagechange Event fonts are fine and attached to title but when I reach to last Tab and return back to last but one i am loosing font but for next back till last tab fonts are attached and working fine.

I have tried with different technique to attach while back to last but one Tab but its not working.

Will some one help in this regards.

Not working

I am attaching below custom function on page load

CurrentPageChanged += OnCurrentPageChanged1;

int _TotalTabCount=getTotaltabCount();

private bool isProcessingPageChange = false;

private async void OnCurrentPageChanged1(object sender, EventArgs e)

{

// Prevent multiple triggers

if (isProcessingPageChange) return;

try

{

    this.CurrentPageChanged -= OnCurrentPageChanged1;

    var tabbedPage = (TabbedPage)sender;

    DisplayContent _DisplayContent = (DisplayContent)tabbedPage.SelectedItem;

    if (CurrentPage != null)

    {

        isProcessingPageChange = true;

        

        await Dispatcher.DispatchAsync(async () =>

        {

            await LoadnextThreeTabfromCollectionAndBindToItemSourceoftabbedPae();

            MainThread.BeginInvokeOnMainThread(() =>

            {

                try

                {

                    if (Children.Count > 1)

                    {

                        if (_TotalTabCount != _DisplayContent.CurrentTabNumber)

                        {

                            CurrentPage = Children[1]; // Set the second tab as selected

                        }                                    

                    }

                }

                catch (ArgumentOutOfRangeException ex)

                {

                    

                }

            });

            isProcessingPageChange = false;

        });

    }

}

catch

{

}

finally

{

    isProcessingPageChange = false;

    this.CurrentPageChanged += OnCurrentPageChanged1;

}

}

Answer 1

Hello,

After testing, this is caused by the fact that the Handler does not re-execute the method to change the font after reloading the TabbedPageItem.

You could manually call this.Handler.SetVirtualView(this); method after await LoadnextThreeTabfromCollectionAndBindToItemSourceoftabbedPae(); method to update the fonts directly after loading.

Best Regards,

Alec Liu.

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