Xamarin.Forms — Xamarin Community Forums

A details page is called using

await Navigation.PushModalAsync(new NavigationPage(new DetailsPage(Item)));

The details page returns control to called page using

await Navigation.PopModalAsync();

Then on returning to the called page the OnAppearing() is invoked. This is still happening in Android app but not in app deployed to iOS13. But in iOS 12.x OnAppearing() is still invoked.

Any reasons? Is it a bug?

This was happening in both Android and iOS. But currently with XF 4.2.0.848062, I see it only in Android. The busy icon goes off if I either go to a page and come back or change the ItemTemplate of the ListViewItem.

Any trick to avoid it? This was not the case with XF 4.1.x.x.

Hi,

I'm trying to figure out why I cannot see all the listitems in my syncfusion listview using UITest or REPL. I can use a query such as app.Query(x=>x.All()) to see all the items on a page that doesn't have a listview, even though many of the items are scrolled way off screen. But trying this on a view that is basically just a big syncfusion listview only can see the individual listitems that are displayed or partially displayed on screen. It's almost as if All() doesn't work with listviews.

What I'm trying to do is get a count of listitems, and scroll to a specific index. But if there are many (say 20) and I can only see 5, I cannot scrolldownto the xth > 5 index item because it simply cannot be seen.

Any thoughts? Is it the control itself, a setting for the control, or typical of listview controls in general? (I'm new to Xamarin and UITests).

Thanks,

Aracknid

I am trying to access my intranet website using Webview but it is not loading the URL and no error is showing. Any idea what is wrong with it.

Label header = new Label
{
Text = "WebView",
FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
HorizontalOptions = LayoutOptions.Center
};

        WebView webView = new WebView
        {
            Source = new UrlWebViewSource
            {
                Url = "https://xxxx.com/xx.app/account/login",

            },
            VerticalOptions = LayoutOptions.FillAndExpand
        };

        // Accomodate iPhone status bar.
        //this.Padding = new Thickness(10, Device.OnPlatform(20, 0, 0), 10, 5);

        // Build the page.
        this.Content = new StackLayout
        {
            Children =
            {
                header,
                webView
            }
        };

My setup is:
VS 2019 ver 16.3.4 on a Windows 10 PC
XCODE 11.1
Mac OS Catalina on a Mac mini

iOS 12.4.2 on iPhone 6

The work around currently are the following tricks, either individually or in a combination:
1. Clean the project and build it
2. Delete the obj and bin directories
3. Restart VS
4. Disconnect and reconnect iPhone 6 to Mac mini

Any solution to reduce the drudgery?

Hello,

i have an error .

What does this mean and what to do about it ?

when i see the source code of xamarin plugins, no one is catching exceptions in their plugin source code. they simply throw an exception so that whoever implements plugin, should catch in his source code. is that the best approach?
Mostly this causes apps to crash and unknown errors to be caught by plugin users. How to best handle those?
I am thinking that isnt it better to expose an interface. So users can use their own exception handling by DI? implement the interface and use your Appcenter, firebase etc. Why xamarin plugin creators dont do that?

I installed the latest font-awesome fonts into my xamarin.forms shared project (targeting Android only). I followed the instructions here:

https://www.wintellect.com/using-fontawesome5-xamarin-forms/

However, I notice that not all the fonts will display on my forms. E.g. fa-eye will display correctly, but fa-vial displays nothing. E.g.

<Label Text="&#xf492;" TextColor="Black" FontSize="Large">
  <Label.FontFamily>
    <OnPlatform x:TypeArguments="x:String" Android="fa-regular-400.ttf#Font Awesome 5 Free Regular" />
  </Label.FontFamily>
</Label>

The above example should display the fa-vial font icon, but nothing is shown. If I change the Text to &#xf06e then the fa-eye font icon is correctly displayed.

Is it possible to have some kind of Cache with WebView?

I need to the "back event" on a WebView don't fire the reload event to the whole page, but just show the page that was already loaded. Is this possible?

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I am using ListView to create a checkbox list and I want the scrollbar always visible so that the user can see there are more element below. Following is my XAML code:

However, the scrollbar is only visible when I start scrolling and disappear again if I didn't touch on the screen which is just like the default setting. I have upgrade the Xamarin.Forms to the latest version 4.2.0.848062, is there any other way to make the scrollbar always visible? Thanks in advance.