flutter pub add phased根據套件公開資料產生的選型評估，僅供參考。
Phased 是一個 Flutter 套件，透過專注於動畫來簡化狀態管理。它讓開發者能以宣告式且直覺的方式管理狀態轉換，特別適合依賴大量動畫變化的介面。透過將狀態更新組織成階段，確保跨元件的順暢、協調動畫。此套件與 Flutter 的動畫系統無縫整合，並促進複雜狀態驅動動畫的乾淨、可讀程式碼。
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。
Simplified state management focused on animations
❗ In order to start using Phased you must have the Flutter SDK installed on your machine.
Add phased to your pubspec.yaml:
dependencies:
phased:
Install it:
flutter packages get
Phased is a simple state management meant to be used to build animations, its objective is to provide an easy, boilerplateless way to create and manage the state of an animation, so developers can focus on building the animations themselves.
The package consists of two classes: PhasedState, which describes the state and offers control methods for an animation, and Phased, an abstract Widget that will build the animation itself.
To build a simple animation that blinks a child using opacity, the following code can be used:
class BlinkState extends PhasedState<bool> {
BlinkState() : super(values: [true, false]);
}
class Blink extends Phased<bool> {
const Blink({
super.key,
required super.state,
required this.child,
});
final Widget child;
@override
Widget build(BuildContext context) {
return AnimatedOpacity(
opacity: state.phaseValue(
values: const {true: 1},
defaultValue: 0,
),
onEnd: state.next,
duration: const Duration(milliseconds: 250),
child: child,
);
}
}
Then to use it:
Blink(
state: BlinkState(),
child: Container(
width: 100,
height: 100,
color: Colors.blue,
),
);
For more complex examples, check the example folder.