.NET MAUI: кроссплатформенная разработка

1dotnet new maui -n MyApp
2cd MyApp
3dotnet build

1<?xml version="1.0" encoding="utf-8" ?>
2<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
3             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
4             x:Class="MyApp.MainPage">
5
6    <VerticalStackLayout Spacing="25" Padding="30,0">
7        <Label Text="Hello, World!"
8               FontSize="32"
9               HorizontalOptions="Center" />
10        
11        <Entry Placeholder="Enter your name"
12               x:Name="NameEntry" />
13        
14        <Button Text="Click Me"
15                Clicked="OnButtonClicked"
16                HorizontalOptions="Center" />
17        
18        <CollectionView x:Name="ItemsCollection">
19            <CollectionView.ItemTemplate>
20                <DataTemplate>
21                    <Label Text="{Binding Name}" />
22                </DataTemplate>
23            </CollectionView.ItemTemplate>
24        </CollectionView>
25    </VerticalStackLayout>
26
27</ContentPage>

1public partial class MainPage : ContentPage
2{
3    public MainPage()
4    {
5        InitializeComponent();
6    }
7
8    private async void OnButtonClicked(object? sender, EventArgs e)
9    {
10        var name = NameEntry.Text;
11        await DisplayAlert("Hello", $"Hello, {name}!", "OK");
12    }
13}

1<Shell xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
2       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
3       x:Class="MyApp.AppShell">
4
5    <ShellContent Title="Home"
6                   ContentTemplate="{DataTemplate local:MainPage}" />
7    
8    <ShellContent Title="Settings"
9                   ContentTemplate="{DataTemplate local:SettingsPage}" />
10</Shell>

1await Shell.Current.GoToAsync("//settings");
2await Navigation.PushAsync(new DetailPage(item));

1public class MainViewModel : INotifyPropertyChanged
2{
3    private string _name = string.Empty;
4    
5    public string Name
6    {
7        get => _name;
8        set
9        {
10            _name = value;
11            OnPropertyChanged();
12            OnPropertyChanged(nameof(Greeting));
13        }
14    }
15    
16    public string Greeting => $"Hello, {Name}!";
17    
18    public event PropertyChangedEventHandler? PropertyChanged;
19    
20    protected void OnPropertyChanged([CallerMemberName] string? name = null)
21    {
22        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
23    }
24}

1// MauiProgram.cs
2public static class MauiProgram
3{
4    public static MauiApp CreateMauiApp()
5    {
6        var builder = MauiApp.CreateBuilder();
7        
8        builder.Services.AddSingleton<IMyService, MyService>();
9        builder.Services.AddTransient<MainViewModel>();
10        
11        return builder.Build();
12    }
13}

1// Platforms/Android/MainApplication.cs
2#if ANDROID
3[Application]
4public class MainApplication : MauiApplication
5{
6    public MainApplication(IntPtr handle, JniHandleOwnership ownership)
7        : base(handle, ownership) { }
8    
9    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
10}
11#endif

1# Android
2dotnet build -t:Run -f net8.0-android
3
4# iOS (требуется Mac)
5dotnet build -t:Run -f net8.0-ios
6
7# Windows
8dotnet build -t:Run -f net8.0-windows10.0.19041.0
9
10# Публикация
11dotnet publish -f net8.0-android -c Release