flutter 自定义 PageRouteBuilder

Question

自定义路由如下：

class FadeRouteBuilder extends PageRouteBuilder {
  final Widget page;
  final int duration;


  FadeRouteBuilder({this.page, this.duration = 1000})
      : super(
          transitionDuration: Duration(milliseconds: duration),
          //Page builder doesn't do anything special, just return the ui.page we were passed in.
          pageBuilder: (context, animation, secondaryAnimation) => page,
          //transitionsBuilder builds 2 nested transitions, one for transitionIn (animation), and one for transitionOut (secondaryAnimation)
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            return FadeTransition(
                //Transition from 0 - 1 when coming on the screen
                opacity: Tween<double>(begin: 0, end: 1).animate(animation),
                child: FadeTransition(
                  //Transition from 1 to 0 when leaving the screen
                  opacity: Tween<double>(begin: 1, end: 0)
                      .animate(secondaryAnimation),
                  child: child,
                ));
          },
        );
}

包含CustomScrollView的页面是PageA，通过FadeRouteBuilder导航到PageB，

弹出pageB时，拖动PageA列表并按住，当PageB关闭时，CustomScrollView无法点击，无效。

Answer 1

我用一个变量来判断Page B是否关闭。

虽然解决了问题，但不够优雅，如果有更好的解决方案，请回答我。 谢谢