为了在 flutter 中获得类似模态的效果(当页面被推到当前页面的顶部时,背景为黑色并且足够透明,以便您可以在背景中看到后面的页面)。
我正在使用 ModalRoute 类在我当前页面的顶部显示一个覆盖小部件。
我的问题是:当我的 TestOverlay
页面进入时,只显示 fadeIn 动画而不显示 Shared Element Hero 动画。
后面的页面有一个 Hero(tag: "111", child: Text("Test"))
小部件,当我调用 Navigator.of(context).push(TestOverlay ());
只有 FadeIn 是动画的,共享元素转换不起作用.. :(
谁知道为什么?
谢谢!!
class TestOverlay extends ModalRoute<void> {
TestOverlay();
@override
Duration get transitionDuration => Duration(milliseconds: 400);
@override
bool get opaque => false;
@override
bool get barrierDismissible => false;
@override
Color get barrierColor => Colors.black.withOpacity(0.7);
@override
String get barrierLabel => null;
@override
bool get maintainState => true;
@override
Widget buildPage(
BuildContext context,
Animation<double> animation,
Animation<double> secondaryAnimation,
) {
// This makes sure that text and other content follows the material style
return Material(
type: MaterialType.transparency,
// make sure that the overlay content is not cut off
child: GestureDetector(
onTap: () {
Navigator.pop(context);
},
behavior: HitTestBehavior.opaque,
child: SafeArea(
child: _buildOverlayContent(context),
),
),
);
}
Widget _buildOverlayContent(BuildContext context) {
return Center(
child: Hero(tag: "111", Text("Test"))
);
}
@override
Widget buildTransitions(
BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child) {
// You can add your own animations for the overlay content
return FadeTransition(
opacity: animation,
child: ScaleTransition(
scale: animation,
child: child,
),
);
}
}
最佳答案
改用PageRoute
:
class TestOverlay extends PageRoute<void> {
TestOverlay({
@required this.builder,
RouteSettings settings,
}) : assert(builder != null),
super(settings: settings);
final WidgetBuilder builder;
@override
bool get opaque => false;
@override
Color get barrierColor => null;
@override
String get barrierLabel => null;
@override
bool get maintainState => true;
@override
Duration get transitionDuration => Duration(milliseconds: 350);
@override
Widget buildPage(BuildContext context, Animation<double> animation,
Animation<double> secondaryAnimation) {
final result = builder(context);
return FadeTransition(
opacity: Tween<double>(begin: 0, end: 1).animate(animation),
child: result,
);
}
}
关于Flutter 共享元素英雄动画不适用于自定义 ModalRoute,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52677981/