sui

Build native Apple apps in Haxe. Your code compiles to C++ through hxcpp and Xcode produces a genuine SwiftUI application for macOS, iOS, iPadOS and visionOS.

import sui.App;
import sui.View;
import sui.ui.*;

class CounterApp extends App {
    @:state var count:Int = 0;

    public function new() {
        super();
        appName = "Counter";
        bundleIdentifier = "com.sui.counter";
    }

    override function body():View {
        return new VStack([
            Text.bind('Count: $count').font(FontStyle.Title).padding(),
            new HStack(null, 20, [
                new Button("-", () -> count--),
                new Button("+", () -> count++)
            ])
        ]);
    }
}

That is examples/counter, unabridged.

Your body() runs on the device

Not at build time. It builds a view tree, SwiftUI is built from that tree at runtime, and a state write reaches the views that display it and nothing else.

An earlier design transpiled body() into SwiftUI ahead of time. That transpiler is kept but no longer used, and Render paths says what replaced it and why — worth reading before touching the --static flag.

Getting started

haxelib git sui https://github.com/lapavoiserie/sui
haxelib run sui init MyApp
cd MyApp && haxelib run sui run          # macos, or: run ios

Needs Haxe 4.3+, hxcpp, Xcode and xcodegen.

Native capabilities

Anything that is not a view — the battery, the camera, secure storage — lives in kui, keyed by operating system, so the same implementation serves a sui application and any other backend building for the same platform.

Part of La Pavoiserie

sui is one backend of mui, which gives an application one view vocabulary across six of them — aui for Android, wui for Windows, cui for the terminal, and others. The same body() runs on all of them.

Documentation

https://lapavoiserie.github.io/sui/

Licence

MIT.