flutter pub add koin根據套件公開資料產生的選型評估，僅供參考。
Koin 是一個輕量級、實用的 Dart 項目依賴注入（DI）框架，旨在簡化應用程式中依賴項的管理。它提供了一種乾淨且簡潔的語法來定義和注入依賴項，促進模組化和可測試性。Koin 支援函數式和基於類的元件，讓開發者能夠輕鬆管理單例、工廠和作用域實例。透過最少的樣板程式碼，它能無縫整合到 Flutter 和其他 Dart 應用程式中，非常適合建立可擴展且易於維護的程式碼庫。
以下為關聯原始碼儲存庫的 README 原文快照，最新內容請造訪原始碼儲存庫。
An pragmatic and flexible lightweight dependency injection library. This is a port of Koin for Dart projects.
Written in pure Dart, using functional resolution only: no code generation, no reflection.
| Package | Pub |
|---|---|
| koin |  |
| koin_test |  |
| koin_flutter |  |
| koin_bloc |  |
| koin_devtools |  |
Allows to dispose your objects at the moment that you are no longer using them.
It does not depend on the Flutter.
Define in which scope a variable can be accessed.
Integration by default for Bloc library, but it can be easily used with any state management.
Koin DevTools to inspect the state of your objects.
Dependencies are instances only when needed.
It is not invasive.
Facilitates dependency injection by constructor
It is not a state manager. Koin does not have any type of state management, use koin with any state manager.
dependencies:
koin: ^[version]
dependencies:
koin: ^[version]
koin_flutter: ^[version]
// Given some classes
class Bloc {
final Repository service;
Bloc(this.service);
get state => "Hello";
}
class Repository {}
// just declare your providers(definitions)
final myModule = Module()
// Declare a single provider(definition) for Bloc class
..single((s) => Bloc(s.get()))
// Declare a single provider(definition) for Repository class
..single((s) => Repository());
Use the startKoin() function to start Koin in your application.
In a Dart app:
void main(List<String> args) {
startKoin((app){
app.module(myModule);
});
}
In an Flutter app:
void main() {
startKoin((app) {
app.module(homeModule);
});
runApp(MyApp());
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
// Get a dependency
final bloc = get<Bloc>();
return Container(
child: Text("${bloc.state()}"),
);
}
}
dependencies:
koin: ^[version]
# Koin for Unit tests
dev_dependencies:
koin_test: ^[version]
dependencies:
koin: ^[version]
koin_flutter: ^[version]
# Koin for Unit tests
dev_dependencies:
koin_test: ^[version]
dependencies:
koin: ^[version]
koin_flutter: ^[version]
koin_bloc: ^[version]
# Koin for Unit tests
dev_dependencies:
koin_test: ^[version]
An simple example in Flutter. Code: Repository
A more elaborate example using Bloc library as a state management. Code: Repository
A application to demonstrate the Koin in a real world application.
Code: Repository
Koin DevTools allows you to inspect the internal state of the objects created by the providers(definitions).
Just insert the KoinDevTools Widget somewhere in your application or use showDevTools.
class Page extends StatefulWidget {
@override
_PageState createState() => _PageState();
}
class _PageState extends State<Page> {
@override
Widget build(BuildContext context) {
return Scaffold(
/// Just insert the KoinDevTools
endDrawer: KoinDevTools(),
body: IconButton(icon: Text('Shod DevTools'), onPressed: () {
// Or use this
showDevTools(context);
},),
);
}
}
Found a bug on a specific feature? Open an issue on Github issues
Want to help or share a proposal about Koin? problem on a specific feature?
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