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The following is a snippet from my XAML:
<ListView.ItemTemplate>




<Grid.RowDefinitions>

</Grid.RowDefinitions>
<Grid.ColumnDefinitions>


</Grid.ColumnDefinitions>


<Label.GestureRecognizers>

</Label.GestureRecognizers>

                            </Grid>
                        </StackLayout>
                    </ViewCell>
                </DataTemplate>

            </ListView.ItemTemplate>

Basically, I am adding a trash can icon on every row and Binding the method DeleteCommand passing the parameter of the object on that row (which is actually a class for AddressType.

In my ViewModel, the following is where I wire up the commands. Snippet:
void DeleteCommandExecute(AddressType address)
{
if (IsBusy)
return;
IsBusy = true;

        try
        {
            DataStore.DeleteAddressTypeAsync(address.Id);
        }
        catch (Exception ex)
        {
            Debug.WriteLine(ex);
        }
        finally
        {
            IsBusy = false;
        }
    }

In my codebehind file, I set the BindingContext to the viewmodel
private AddressTypeViewModel viewModel;
public AddressTypes()
{
InitializeComponent();
BindingContext = viewModel = new AddressTypeViewModel();
stack = Addresspopup.PopupView.ContentTemplate.CreateContent() as StackLayout;

    }

The DeleteCommand never executes. It appears no binding occured (even though the {Binding AddressTypeName} works as expected.

I have no idea why.

I also tried just catching the Tap event in my code behind by doing this in my XAML:

<Label.GestureRecognizers>

</Label.GestureRecognizers>

I added this to my code behind:
public void OnDelete_Tapped(object sender, EventArgs e)
{
viewModel.DeleteCommand.Execute(e); //deletes the item

        viewModel.LoadAddressTypesCommand.Execute(true); //reload the addresstypes
    }

The DeleteCommand does NOT execute! I put a breakpoint in that method in my view model - nothing happens - never hits it.

Can someone shed any light on this? Thanks in advance!

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Please Help

Recently I have been building an app that allows Bluetooth communication. I have been following this documentation and I got the connection working. Since it is a blocking call the popup message disapears when another person clicks connect. But now I cant find the error when receiving. The sending doesnt post an error. But when checking if receive returns a value, both apps run unresponsive without any error or crash. I call the code with buttons like this (with dependency service):

`private void SendData(object sender, EventArgs e)
{
    string test = "Testing";
    byte[] temp = Encoding.ASCII.GetBytes(test);
    DependencyService.Get<BluetoothManager>().write(temp);
}

private void CheckButton(object sender, EventArgs e)
{
    if (DependencyService.Get<BluetoothManager>().read() != null)
    {
        CheckTxt.Text = "Ok";
    }
}`

The CheckButton is used to only check if something was returned.

And then this is my entire Bluetooth class:

` using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Bluetooth;
using Xamarin.Forms;
using ShareTheMusic.Droid;
using Java.Util;
using System.IO;

[assembly: Dependency(typeof(BluetoothManagerService))]
namespace ShareTheMusic.Droid
{
    public class BluetoothManagerService : BluetoothManager
    {
        BluetoothAdapter btAdapter = BluetoothAdapter.DefaultAdapter;
        BluetoothServerSocket mServerSocket = null;
        BluetoothSocket mSocket = null;
        BluetoothDevice mDevice = null;
        UUID uuid = UUID.FromString("30324d3a-3050-4e87-a159-f8fa6c433786");

        Stream mmInStream;
        Stream mmOutStream;
        byte[] mmBuffer = null;

        public string checkBluetooth(bool permition)
        {
            if (btAdapter == null)
            {
                return "NoBluetooth";
            }
            else
            {
                if (btAdapter.IsEnabled == false && permition != true)
                {
                    return "TurnOnBluetooth";
                }
                else if(permition == true)
                {
                    btAdapter.Enable();
                    return "AlreadyOn";
                }
                else
                {
                    return "AlreadyOn";
                }
            }
        }

        public string[] findBTdevices()
        {
            string[] deviceNames = null;
            deviceNames = (from qr in BluetoothAdapter.DefaultAdapter.BondedDevices select 
                           qr.Name).ToArray();
            return deviceNames;
        }

        public string discoverDevices()
        {
            return "not implemented yet";
        }

        public void acceptThread()
        {
            BluetoothServerSocket temp = null;

            try
            {
                temp = btAdapter.ListenUsingRfcommWithServiceRecord("ShareTheMusic", uuid);
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine("Socket's listen() method failed", ex);
            }
            mServerSocket = temp;
        }


        public void runServerSide()
        {
            acceptThread();
            BluetoothSocket socket = null;

            while (true)
            {
                try
                {
                    socket = mServerSocket.Accept();
                }
                catch (Exception ex)
                {
                    System.Diagnostics.Debug.WriteLine("Socket's accept() method failed", ex);
                }

                if (socket != null)
                {
                    manageConnectedSocket(socket);
                    mServerSocket.Close();
                    break;
                }
            }
        }

        public void ConnectThread(BluetoothDevice device)
        {
            BluetoothSocket temp = null;
            mDevice = device;

            try
            {
                temp = device.CreateRfcommSocketToServiceRecord(uuid);
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine("Socket's create() method failed", ex);
            }
            mSocket = temp;
        }

        public void runClientSide(string deviceName)
        {
            BluetoothDevice tmp = (from qr in BluetoothAdapter.DefaultAdapter.BondedDevices where 
                                        qr.Name == deviceName select qr).FirstOrDefault();
            ConnectThread(tmp);

            try
            {
                mSocket.Connect();
            }
            catch (Exception ex)
            {
                try
                {
                    mSocket.Close();
                }
                catch (Exception)
                {
                    System.Diagnostics.Debug.WriteLine("Could not close the client socket", ex);
                }
            }
            manageConnectedSocket(mSocket);
        }

        public void cancel()
        {
            try
            {
                mSocket.Close();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine("Could not close the connect socket", ex);
            }
        }

    /*---------------------*/

        public void manageConnectedSocket(BluetoothSocket socket)
        {
            mSocket = socket;
            Stream tmpIn = null;
            Stream tmpOut = null;

            try
            {
                tmpIn = socket.InputStream;
            }
            catch (IOException ex)
            {
                System.Diagnostics.Debug.WriteLine("Error occurred when creating input stream", ex);
            }
            try
            {
                tmpOut = socket.OutputStream;
            }
            catch (IOException ex)
            {
                System.Diagnostics.Debug.WriteLine("Error occurred when creating output stream", ex);
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }

        public List<byte[]> read()
        {
            mmBuffer = new byte[1024];
            int numBytes;
            List<byte[]> intBytes = new List<byte[]>();

            while (true)
            {
                try
                {
                    numBytes = mmInStream.Read(mmBuffer);
                    intBytes.Add(BitConverter.GetBytes(numBytes));
                }
                catch (IOException ex)
                {
                    System.Diagnostics.Debug.WriteLine("Input stream was disconnected", ex);
                    break;
                }
            }
            return intBytes;
        }

        public void write(byte[] bytes)
        {
            try
            {
                mmOutStream.Write(bytes);
            }
            catch (IOException ex)
            {
                System.Diagnostics.Debug.WriteLine("Error occurred when sending data", ex);
            }
        }
    }
}`

Hello everyone !

It seems that PanGestureRecognizer and ScrollView are not working together on Android.

I use them in a listview.

With PanGesture I need to detect the gesturetap and scrollview to scroll my content.

Is there a way to do this with a custom renderer for Android ?

Thanks !

Hello guys,

I have a Custom Entry Renderer:
`
using System;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
namespace Retailer.CustomControl
{
public class TextBox : Entry
{

    public static readonly BindableProperty BorderVisibilityProperty = BindableProperty.Create("BorderVisibility", typeof(bool), typeof(TextBox), false, BindingMode.TwoWay);

    public bool BorderVisibility
    {
        get
        {
            return (bool)GetValue(BorderVisibilityProperty);
        }
        set
        {
            SetValue(BorderVisibilityProperty, value);
        }
    }

    public new event EventHandler Completed;

    public void SendComplete()
    {
        Completed?.Invoke(this, EventArgs.Empty);
    }
}

}
`

in a rg.Xamarin.Pupup Page.

`
<?xml version="1.0" encoding="UTF-8"?>

<Grid VerticalOptions="Center" HorizontalOptions="Center">
    <ScrollView>
        <StackLayout VerticalOptions="Center" HorizontalOptions="Center" BackgroundColor="WhiteSmoke" Padding="16" WidthRequest="320">
            <StackLayout>
                <Label Text="No store information found!" FontSize="Medium" HorizontalOptions="Center" VerticalOptions="Center"/>
                <Label Text="Please insert this information about your store" FontSize="Body" HorizontalOptions="Center" VerticalOptions="Center"/>
            </StackLayout>

            <StackLayout>
                <Label Text="{Binding CountryTextBlockText}"/>
                <UserControl:TextBox Text="{Binding CountryTextBoxText}" />
            </StackLayout>

            <StackLayout>
                <Label Text="{Binding StreetTextBlockText}"/>
                <StackLayout Orientation="Horizontal">
                    <UserControl:TextBox Text="{Binding StreetTextBoxText}" />
                    <UserControl:TextBox Text="{Binding HouseNumberTextBoxText}"/>
                </StackLayout>
            </StackLayout>

            <StackLayout>
                <Label Text="{Binding PostalCodeTextBlock}"/>
                <UserControl:TextBox Placeholder="{Binding PostalCodeTextBoxText}" />
            </StackLayout>

            <StackLayout Orientation="Horizontal">
                <Label Text="{Binding MapVisibilityLabel}"/>
                <Switch IsToggled="{Binding ShowMapToggleToggled}"/>
            </StackLayout>

            <StackLayout Orientation="Horizontal">
                <Label Text="{Binding UseCurrentPositionButton}"/>
                <Button Text="{Binding UseCurrentPositionButtonText}" Command="{Binding GetCurrentPositionButtonCommand}"/>
            </StackLayout>

            <map:Map HeightRequest="240" IsVisible="{Binding ShowMapToggleToggled}"/>

            <Button Text="Submit" Command="{Binding SubmitButtonCommand}"/>
        </StackLayout>
    </ScrollView>
</Grid>

`

For UWP I created a Custom Renderer:

`
using Retailer.UWP.Renderer;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.UI;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
using Xamarin.Forms;
using Xamarin.Forms.Platform.UWP;

[assembly: ExportRenderer(typeof(Retailer.CustomControl.TextBox), typeof(TextBoxRenderer))]
namespace Retailer.UWP.Renderer
{
public class TextBoxRenderer : EntryRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs e)
{
base.OnElementChanged(e);

        if (e.OldElement == null)
        {
            Control.BorderBrush = new SolidColorBrush();
        }
    }

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {

        if (((Retailer.CustomControl.TextBox)sender).BorderVisibility == false)
        {
            Control.BorderBrush = new SolidColorBrush();
        }

        if(e.PropertyName == nameof(TextBox.TextProperty))
        {
            if(Control.Text != (sender as Retailer.CustomControl.TextBox).Text)
                Control.Text = (sender as Retailer.CustomControl.TextBox).Text;
        }

    }

    private void FixFormsBackgroundColor(Xamarin.Forms.Frame frame)

    {

        var color = new Windows.UI.Color

        {

            A = Convert.ToByte(frame.BackgroundColor.A * 255),

            R = Convert.ToByte(frame.BackgroundColor.R * 255),

            G = Convert.ToByte(frame.BackgroundColor.G * 255),

            B = Convert.ToByte(frame.BackgroundColor.B * 255)

        };



        if (Control.Parent is Panel parent)

        {

            parent.Background = null;

        }



        Control.Background = new SolidColorBrush(color);

    }
}

}
`

For iOS:
`
using Retailer.CustomControl;
using Retailer.iOS.Renderer;
using System.ComponentModel;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(TextBox), typeof(TextFieldRenderer))]
namespace Retailer.iOS.Renderer
{
public class TextFieldRenderer : EntryRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs e)
{
base.OnElementChanged(e);

        if (Control == null)
        {
            Control.BorderStyle = UITextBorderStyle.None;
            Control.BackgroundColor = UIColor.White;
        }


    }
    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);

        if (Control != null && ((Retailer.CustomControl.TextBox)sender).BorderVisibility == false)
        {
            Control.BorderStyle = UITextBorderStyle.None;
        }
        else
        {
            Control.BorderStyle = UITextBorderStyle.Line;
        }
    }
}

}
`

And Android:

`
using Android.Content;
using Retailer.Droid.Renderer;
using System.ComponentModel;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(Retailer.CustomControl.TextBox), typeof(CustomEntryRenderer))]
namespace Retailer.Droid.Renderer
{
public class CustomEntryRenderer : EntryRenderer
{
public CustomEntryRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs e)
{
base.OnElementChanged(e);

        if (Control != null)
        {
            Control.SetBackground(new Android.Graphics.Drawables.ColorDrawable(Android.Graphics.Color.White));
        }
    }

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);

        if (((Retailer.CustomControl.TextBox)sender).BorderVisibility == false)
        {

        }
    }
}

}
`

Changing the Properties in Constructure in ViewModel works to change the Value of myCustom Renderer TextBox. But I am trying to fill the TextBoxes with Lication Data from Geocoding.

` private string countryTextBoxText;

    public string CountryTextBoxText
    {
        get { return countryTextBoxText; }
        set { SetProperty(ref countryTextBoxText, value);
 }

`

`
private async Task setCurrentPlacemark()
{
var location = await Geolocation.GetLocationAsync();

        var placemarks = await Geocoding.GetPlacemarksAsync(location);

        currentPlacemark = placemarks?.FirstOrDefault();

        CountryTextBoxText = currentPlacemark.CountryName;

        if (placemarks != null)
        {
            PositionDataDownloaded();
        }

    }

`

But this does not work. Replacing TextBox with Entry works perfectly. I think my Custom renderer does sot support Binding the original Text Property. But Why?

Hopefully someone can help.

How share image for instagram, facebook?

can anyone suggest for searchable picker

Hi!

I have a problem when in a CollectionView I assign the value True to attribute IsGrouped.

In UWP it works fine, but in Android it fails

What should I do?

I already have the CollectionView Flags configured in my MainActivity

<CollectionView ItemSizingStrategy="MeasureAllItems" 
                    ItemsSource="{Binding Modules}"
                    IsGrouped="True"
                    SelectionMode="Single">
    • • •
</CollectionView>

Thanks for your attention!!

Prior to iOS 13, you could set a background color in a ViewCell, and change that background color to another color when the cell is pressed. The color change would start on the press down and reset on release. The press feedback no longer works in iOS 13 if you use a cell background color other than transparent.

I need to use a cell background color to get the style I want in my app. Does anyone know a way to use a cell background color and get a touch effect in iOS 13 in a ListView? I've tried a number of approaches, but they all just capture the press release, not the press down. I did manage a workaround for cells in a TableView, but I still need help for cells in a ListView. Thanks!

... and if so is there a way around that?

I am asking since quite a large part of our Apps users is on Huawai phones and due to the current embargo Huawei will be discarding the Google Play Services and everything related with upcoming phones.

Since our Apps are all written in Xamarin.Forms we are now faced to investigate if we can support running our Apps on Huawei phones that do not have Google Play Services.

Sorry if that question has already been asked, but searching through Google did not provide me with satisfying results.

Best regards.

I have a custom control with 2 custom properties that I want to see in the Xamarin.Forms Previewer in Visual Studio 2019. Here is the code for the custom control:

using System;
using System.ComponentModel;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace ScorePad
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    [DesignTimeVisible(true)]
    public partial class CheckBox : StackLayout
    {
        public event EventHandler<CheckedChangedEventArgs> CheckedChanged = (sender, e) => { };
        public static readonly BindableProperty TextProperty = BindableProperty.Create("Text", typeof(String), typeof(CheckBox), string.Empty);
        public static readonly BindableProperty IsCheckedProperty = BindableProperty.Create("IsChecked", typeof(bool), typeof(CheckBox), false);

        public string Text
        {
            get => (string)GetValue(CheckBox.TextProperty);
            set => SetValue(CheckBox.TextProperty, value);
        }
        public bool IsChecked
        {
            get => (bool)GetValue(CheckBox.IsCheckedProperty);
            set => SetValue(CheckBox.IsCheckedProperty, value);
        }

        public CheckBox()
        {
            InitializeComponent();
            this.chkCheckBox.CheckedChanged += this.ChkCheckBox_CheckedChanged;
        }

        private void ChkCheckBox_CheckedChanged(object sender, CheckedChangedEventArgs e) { this.CheckedChanged(this, e); }
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<StackLayout x:Class="ScorePad.CheckBox" x:Name="CheckBoxRoot"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:d="http://xamarin.com/schemas/2014/forms/design"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" BackgroundColor="Black" Style="{StaticResource CheckBoxStackLayoutStyle}">
    <CheckBox x:Name="chkCheckBox" Style="{StaticResource CheckBoxBoxStyle}" BindingContext="{x:Reference CheckBoxRoot}" IsChecked="{Binding IsChecked}"/>
    <Label Style="{StaticResource CheckBoxLabelStyle}" BindingContext="{x:Reference CheckBoxRoot}" Text="{Binding Text}"/>
</StackLayout>

Notice that the 2 custom properties (Text & IsChecked) are databound to the controls in the custom control. However, they do not appear in the Previewer, although they do appear when I debug the app. This is my first custom control, so maybe I'm just forgetting something simple, so any help would be appreciated. Thanks.

I need to go to the next page from my current page(WelcomeView). I use next syntax.

await NavigationService.NavigateAsync(new Uri("app:///WelcomeView/RegistrationView", UriKind.Absolute));

But it doesn't work. I still on my WelcomeView page. But if i write /WelcomeView/RegistrationView/LoginView app jump over the RegistrationView to the LoginView. How can I fix it? What am I doing wrong?

Hello,

Zebra Technologies have SDKs for their RFID Scanners on platforms including native iOS, native Android and Xamarin.Android however not for Xamarin.iOS or Xamarin.Forms.

We are currently building a Xamarin.Forms app which critically requires the use of the RFID Scanner (RFD8500 model to be precise) on iOS. Our understanding is that this can be achieved by creating an iOS Binding Library for Zebra's existing Objective-C iOS SDK. I have personally attempted to bind this library through two methods, one being the classic iOS Binding method and two, creating a local C# Nuget Package for consumption. Due to lack of Objective-C experience, both attempts were unsuccessful.

What we would like to know is:

• Is what we are trying to do even possible? (i.e would a binding library be enough to get the RFID scanners to work with a .forms app)
• If so, what is the scale of effort?
• As we lack the technical skills for it, would anybody be up for getting involved in this Open Source? (doing the actual work)

I think this would be a great project to do as over the last few months, I have found that a LOT of developers/companies have suffered from this same issue.

Thank you
Ridhwan

I have done the following things:

1. Created a project in FCM console and added ios project into it.
2. Downloaded the GoogleService-Info.plist and added it to the xamarin forms ios project directory and set the build action as Bundlesource.
3. On Info.plist enabled remote notification background mode.
4. Added FirebaseAppDelegateProxyEnabled in the app’s Info.plist file and set it to No.
5. Created a provisioning profile and distribution certificate and installed it into the keychain access. Also, mapped these certificates in the project options.
6. Uploaded .p12 certificate in FCM console.
7. Added codes for handling push notification in AppDelegate.cs.

My Code:

    [Register("AppDelegate")]
    public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
    {
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            global::Xamarin.Forms.Forms.Init();
            LoadApplication(new App("",""));
            RequestPushPermissionsAsync();
            _launchoptions = options;
            return base.FinishedLaunching(app, options);
        }
        NSDictionary _launchoptions;
        public override void OnActivated(UIApplication uiApplication)
        {
            base.OnActivated(uiApplication);
            if (_launchoptions != null && _launchoptions.ContainsKey(UIApplication.LaunchOptionsRemoteNotificationKey))
            {
                var notfication = _launchoptions[UIApplication.LaunchOptionsRemoteNotificationKey] as NSDictionary;
                PresentNotification(notfication);
            }
            _launchoptions = null;
        }

        async Task RequestPushPermissionsAsync()
        {
            var requestResult = await UNUserNotificationCenter.Current.RequestAuthorizationAsync(
                 UNAuthorizationOptions.Alert
                | UNAuthorizationOptions.Badge
                | UNAuthorizationOptions.Sound);

            bool approved = requestResult.Item1;
            NSError error = requestResult.Item2;
            if (error == null)
            {
                if (!approved)
                {
                    Console.Write("Permission to receive notification was not granted");
                    return;
                }

                var currentSettings = await UNUserNotificationCenter.Current.GetNotificationSettingsAsync();
                if (currentSettings.AuthorizationStatus != UNAuthorizationStatus.Authorized)
                {
                    Console.WriteLine("Permissions were requested in the past but have been revoked (-Settings  app)");
                    return;
                }
                UIApplication.SharedApplication.RegisterForRemoteNotifications();
            }
            else
            {
                Console.Write($"Error requesting permissions: {error}.");
            }
        }

        public async override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
        {
            if (deviceToken == null)
            {
                return;
            }
            Console.WriteLine($"Token received: {deviceToken}");
            await SendRegistrationTokenToMainPRoject(deviceToken);
        }

        async Task SendRegistrationTokenToMainPRoject(NSData deviceToken)
        {
            MessagingCenter.Send<object, string>(this, "fcmtoken", deviceToken.ToString());
        }

        public override void FailedToRegisterForRemoteNotifications(UIApplication application, NSError error)
        {
            Console.WriteLine($"Failed to register for remote notifications: {error.Description}");
        }

        public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo,
            Action<UIBackgroundFetchResult> completionHandler)
        {
            PresentNotification(userInfo);
            completionHandler(UIBackgroundFetchResult.NoData);
            try
            {
                UIApplication.SharedApplication.ApplicationIconBadgeNumber = 0;
                NSDictionary aps = userInfo.ObjectForKey(new NSString("aps")) as NSDictionary;
                var message = (aps[new NSString("webContentList")] as NSString).ToString();
                LoadApplication(new App("", message));
            }
            catch (Exception ex)
            {
                //LogInfo.ReportErrorInfo(ex.Message, ex.StackTrace, "AppDelegate-DidReceiveRemoteNotification");
            }
        }

        void PresentNotification(NSDictionary userInfo)
        {
            NSDictionary aps = userInfo.ObjectForKey(new NSString("aps")) as NSDictionary;

            var msg = string.Empty;

            if (aps.ContainsKey(new NSString("alert")))
            {
                msg = (aps[new NSString("alert")] as NSString).ToString();
            }
            if (string.IsNullOrEmpty(msg))
            {
                msg = "(unable to parse)";
            }
            MessagingCenter.Send<object, string>(this, App.NotificationReceivedKey, msg);
        }
    }

I am not using any NuGet packages in ios part. When running the project into a device, the FCM token generating part is working and I can see the fcm token on the VS console. I tried to send a test notification to a device from postman but getting InvalidRegistration error.

Postman Response

{
    "multicast_id": 8754155136812875313,
    "success": 0,
    "failure": 1,
    "canonical_ids": 0,
    "results": [
        {
            "error": "InvalidRegistration"
        }
    ]
}

Postman Body

 {
    "to" : "d20ad003 7473bfba 85dffc33 1534decf b4b886f1 c738878f fd7f2c60 d9dabc36",
 "collapse_key" : "type_a",
 "data" : {
     "body" : "Body of Your Notification in Data",
     "title": "Title of Your Notification in Title",
     "key_1" : "Value for key_1",
     "key_2" : "Value for key_2"
 },
 "notification" : {
     "body" : "Body of Your Notification",
     "title": "Title of Your Notification",
     "sound": "default",
     "content_available" : true
 }
}

I have completed the android part implementation and notifications are receiving when push from the postman. But getting InvalidRegistration error on postman and not receiving any notification in my ios device.

Anyone suggest a solution for this issue.

Thanks in advance.

Hello,

can anybody tell me how to provide App Icons for iOS 13?
I can'T upload my App because Xcode complaints that the App Icons are missing?