Flutter 在颤振中更改Rive 2动画

我有一个用Rive 2创建的.riv文件。 它包含多个动画

我想播放默认动画，但根据流的输入对其进行更改

下面的代码仅播放“默认”动画，即使开关大小写发生更改，也不会更新。 代码跳转到右边的switch case语句中，我通过日志检查了它。 但动画并没有改变

如何从Rive artboard播放不同的动画

国家级：

class _GraphicState extends State<Graphic> {
  final riveFileName = 'assets/rive/character.riv';
  Artboard _artboard;

  @override
  void initState() {
    _loadRiveFile();
    super.initState();
  }

  // loads a Rive file
  void _loadRiveFile() async {
    final bytes = await rootBundle.load(riveFileName);
    final file = RiveFile();

    if (file.import(bytes)) {
      // Select an animation by its name
      setState(() => _artboard = file.mainArtboard
        ..addController(
          SimpleAnimation('default'),
        ));
    }
  }

---

每次执行

\u artboard.artboard..addController时，请尝试调用
setState（（）=>{}）
。

好的，您可以使用“混合驱动动画”

代码：

然后把小部件放在任何地方

Container(
   height: 100.0, width: 100.0,
   child: Rive(
      artboard: _artboard,
      fit: BoxFit.scaleDown,
      alignment: Alignment.center,
   ),
)

Widget selectGraphic(state) {
    if (_artboard != null) {
      switch (state) {
        case 1:
          _artboard.artboard..addController(SimpleAnimation('run'));
          break;
        case 2:
          _artboard.artboard..addController(SimpleAnimation('stand'));
          break;
        case 3:
          _artboard.artboard..addController(SimpleAnimation('dead'));
          break;
        default:
          _artboard.artboard..addController(SimpleAnimation('default'));
      }
      return Rive(
        artboard: _artboard,
        fit: BoxFit.cover,
      );
    } else {
      return Container();
    }
  }

AnimationController animationController;
final String animationSell  = "sell_item";
final String animationAdd   = "add_item";
final String animationEmpty = "empty_cart";
final riveFileName          = 'assets/animation/cart.riv';
Artboard _artboard;
RiveAnimationController _wipersController;

@override
  void initState() {
    _loadRiveFile();
    super.initState();
}

void _loadRiveFile() async {
    final bytes = await rootBundle.load(riveFileName);
    final file = rive.RiveFile();
    if (file.import(bytes)) {
      setState(() => _artboard = file.mainArtboard..addController(rive.SimpleAnimation(animationSell)));
    }
}

void _wipersChange(KartState state) {
    switch (state.index) {
      case 0:
        _artboard.addController(
          _wipersController = rive.SimpleAnimation(animationEmpty),
        );
        break;
      case 1:
        _artboard.addController(
          _wipersController = rive.SimpleAnimation(animationAdd),
        );
        break;
      case 2:
        _artboard.addController(
          _wipersController = rive.SimpleAnimation(animationSell),
        );
        break;
      default:
        _artboard.addController(
          _wipersController = rive.SimpleAnimation(animationEmpty),
        );
    }
}

Container(
   height: 100.0, width: 100.0,
   child: Rive(
      artboard: _artboard,
      fit: BoxFit.scaleDown,
      alignment: Alignment.center,
   ),
)