XamariniOS-ChangeAppIcon Programmatically

 

Using Dependency Service we can Do this so first we start with interface creation in our portable projects.

   public interface IAppIconSwitchService

    {

        Task SwitchAppIcon(string iconName);

    }

and in MainPage.xaml

async void Xamarin_Button_Clicked(System.Object sender, System.EventArgs e)

{

var iconSwitcher = DependencyService.Get<IAppIconSwitchService>();
await iconSwitcher.SwitchAppIcon(null);
}



async void Maui_Button_Clicked(System.Object sender, System.EventArgs e)

{
var iconSwitcher = DependencyService.Get<IAppIconSwitchService>();
await iconSwitcher.SwitchAppIcon("MauiLogo");

}

using System;

using System.Threading.Tasks;

using AppIconUpdater;

using AppIconUpdater.iOS;

using UIKit;

using Xamarin.Forms;

[assembly: Xamarin.Forms.Dependency(typeof(AppIconSwitchService))]

namespace AppIconUpdater.iOS

{

    public class AppIconSwitchService : IAppIconSwitchService

    {

        public async Task SwitchAppIcon(string iconName)

        {

            if (UIApplication.SharedApplication.SupportsAlternateIcons)

            {

                if (iconName == "MauiLogo")

                    await UIApplication.SharedApplication.SetAlternateIconNameAsync(iconName);

                else

                    UIApplication.SharedApplication.SetAlternateIconName(null, (error) => { Console.WriteLine(error); });

            }

        }

    }

}

Keep your logo Under Resources/ in IOS project and Create Resource Dictionary in info.plist

as we used await iconSwitcher.SwitchAppIcon("MauiLogo"); so it will get the logo.