如何在颤振中使用英雄过渡期间未运行的动画/动画?

事实证明, flightShuttleBuilder 仅在过渡的开始和结束处发射值,而不是在整个动画中。捕捉来自 this issue on GitHub 显然是预期行为。

解决方法是创建您自己的过渡,从 AnimatedWidget ;它将正常发出值,并且可以在 飞行航天飞机制造商 :

class FlipcardTransition extends AnimatedWidget {
  final Animation<double> flipAnim;
  final Widget child;

  FlipcardTransition({@required this.flipAnim, @required this.child})
      : assert(flipAnim != null),
        assert(child != null),
        super(listenable: flipAnim);

  @override
  Widget build(BuildContext context) {
    return Transform(
      transform: Matrix4.identity()
        ..rotateY(-pi * flipAnim.value),
      alignment: FractionalOffset.center,
      child: child,
    );
  }
}

...

flightShuttleBuilder: (BuildContext flightContext,
  Animation<double> animation,
  HeroFlightDirection flightDirection,
  BuildContext fromHeroContext,
  BuildContext toHeroContext,) {
    final Hero toHero = toHeroContext.widget;
    return FlipcardTransition(
      flipAnim: animation,
      child: toHero,
    );
},