appkit

Typed Cocoa / AppKit bindings for building native macOS desktop apps. 15 sub-modules cover the framework: runtime, application, window, view, controls, text, containers, data, graphics, menu, dialogs, panels, toolbar, controllers, and convert.

Callbacks are closure-free: Button::set_on_click(fn(*u8)) stashes a named function on the sender via objc_setAssociatedObject, in keeping with C+ having no closures. The appkit/convert module is the C+ to Objective-C data bridge for string, Vec[T], and NSData; primitives and #[repr(C)] structs (NSPoint, NSSize, NSRect) cross the boundary verbatim.

import "appkit/application" as application;
import "appkit/window" as window;

fn main() -> i32 {
    let pool = application::AutoreleasePool::new();
    let app  = application::Application::shared();
    app.set_activation_policy(0 as i64);
    // ... build window + controls ...
    app.run();
    pool.drain();
    return 0;
}

A runnable reference app lives in the compiler repo at docs/examples/recipes/appkit_hello/. For the underlying Objective-C message-send mechanics, see FFI.