https://github.com/sajjon/nanoviewcontroller
UIKit architecture built on top of MVVM-C allowing for single line UIViewControllers.
https://github.com/sajjon/nanoviewcontroller
Last synced: 3 months ago
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UIKit architecture built on top of MVVM-C allowing for single line UIViewControllers.
- Host: GitHub
- URL: https://github.com/sajjon/nanoviewcontroller
- Owner: Sajjon
- License: other
- Created: 2026-05-02T13:07:45.000Z (3 months ago)
- Default Branch: main
- Last Pushed: 2026-05-02T15:06:13.000Z (3 months ago)
- Last Synced: 2026-05-02T17:11:47.553Z (3 months ago)
- Language: Swift
- Size: 80.1 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# NVC: NanoViewController
A UIKit architecture built on top of MVVM-C allowing you to create `UIViewController`s declaratively with as little as a single line of code.
# History
Implementation happened in 2018 in https://github.com/sajjon/zhip (originally https://github.com/openzesame/zhip); then called "SLC: SingleLineController". You can read my blog posts from 2018, [part one](https://medium.com/@sajjon/single-line-controller-fbe474857787) and [part two](https://medium.com/@sajjon/single-line-controller-advanced-case-406e76731ee6) - since ported from RxSwift to Combine and extracted into this separate repo.
# Library products
The package ships six independent SPM library targets so consumers can pick exactly what they need:
| Product | Layer | Notes |
|---|---|---|
| `NanoViewControllerCore` | value types | `ViewModelType`, `InputType`, `EmptyInitializable`, `AbstractViewModel`, `AbstractTarget`, `ActivityIndicator`, `ErrorTracker` |
| `NanoViewControllerCombine` | reactive | `Binder`, the `-->` operator, `Publisher+Extras`, `UIControl`/`UITextField`/`UIView` publisher extensions |
| `NanoViewControllerNavigation` | coordinators | `Coordinating`, `BaseCoordinator`, `Navigator`, `Stepper` |
| `NanoViewControllerController` | UIKit glue | `SceneController`, `BarButtonContent`, `InputFromController`, `ViewModelled`, `NavigationBarLayoutingNavigationController`, `Toast` |
| `NanoViewControllerSceneViews` | UIKit views | `AbstractSceneView`, `BaseScrollableStackViewOwner`, `BaseTableViewOwner`, `SingleCellTypeTableView`, `CellConfigurable`, pull-to-refresh / class-identifiable / footer plumbing |
| `NanoViewControllerDIPrimitives` | DI protocols | `Clock`, `MainScheduler`, `DateProvider`, `HapticFeedback`, `Pasteboard`, `UrlOpener` |
`Combine`, `Navigation`, `Controller`, `SceneViews`, `DIPrimitives` all depend on `Core`. UIKit modules (`Controller`, `SceneViews`, `DIPrimitives`) need iOS 26+; pure value-type modules build on macOS 14+ too. Every target compiles in Swift 6.2 language mode (`swift-tools-version: 6.2`) so the package's `@MainActor`-on-UIKit annotations are enforced as hard errors at the consumer's call site.
# Local development
First-time setup on a fresh clone:
```sh
brew install just # bootstraps the rest
just bootstrap # brew bundle install + git hooks (pre-commit + pre-push)
```
Then:
```sh
just test # build + run the per-package XCTest bundles on iPhone 17 / iOS 26.1
just cov # tests with coverage report
just fmt # swiftformat + swiftlint --fix
just # list every recipe
```
CI runs the same pipeline on every push / PR — typos check, swiftformat lint, swiftlint strict, build + test on the iOS Simulator. See `.github/workflows/ci.yml`.
The `pre-commit` hook installed by `just bootstrap` enforces: typos, shellcheck, swiftformat lint, swiftlint strict on every commit; and the full test suite on every push.
# Example: SignUpDemo
`Examples/SignUpDemo/` is a small UIKit iOS app that walks through every load-bearing piece of the package: a `SceneController`-backed sign-up screen, a `Coordinator` swap on success, and a logout button on the home screen that re-runs the onboarding flow. It uses a stub `SignUpServicing` (instant-success) so it runs out of the box on the simulator.
```sh
just example-gen # generate Examples/SignUpDemo/SignUpDemo.xcodeproj from project.yml
just example-build # xcodebuild for iPhone 17 simulator
open Examples/SignUpDemo/SignUpDemo.xcodeproj # then ⌘R in Xcode
```
The example shows the canonical wiring: scene = `SceneController`, view-model subclasses the package's `BaseViewModel` (which fixes `FromController` to `InputFromController` and provides a `Navigator`), coordinator subscribes to that navigator and routes the user-actions to push / pop / present transitions.