Flutter：自定義過渡 (PageRouteBuilder) 禁用英雄動畫

Question

我目前正在嘗試使用PageRouteBuilder進行自定義轉換。 但是，當我使用它時，我的英雄動畫停止工作。

注意：它適用於其他過渡，甚至其他自定義過渡。

EnterExitRoute.dart

import 'package:flutter/material.dart';

class EnterExitRoute extends PageRouteBuilder {
  final Widget enterPage;
  final Widget exitPage;
  EnterExitRoute({this.exitPage, this.enterPage})
      : super(
          pageBuilder: (
            BuildContext context,
            Animation<double> animation,
            Animation<double> secondaryAnimation,
          ) {
            return enterPage;
          } ,
          transitionsBuilder: (
            BuildContext context,
            Animation<double> animation,
            Animation<double> secondaryAnimation,
            Widget child,
          ) {
              return Stack(
                children: <Widget>[
                  SlideTransition(
                    position: new Tween<Offset>(
                      begin: const Offset(0.0, 0.0),
                      end: const Offset(-1.0, 0.0),
                    ).animate(animation),
                    child: exitPage,
                  ),
                  SlideTransition(
                    position: new Tween<Offset>(
                      begin: const Offset(1.0, 0.0),
                      end: Offset.zero,
                    ).animate(animation),
                    child: enterPage,
                  )
                ],
              );
          }
        );
}

我的猜測是 Hero 動畫跟不上SlideTransition 。

有想法該怎么解決這個嗎 ？

Answer 1

正如 pskink 所說，問題不在於使用child引用。

這是更新后的工作代碼

import 'package:flutter/material.dart';

class EnterExitRoute extends PageRouteBuilder {
  final Widget enterPage;
  final Widget exitPage;
  EnterExitRoute({this.exitPage, this.enterPage})
      : super(
          pageBuilder: (
            BuildContext context,
            Animation<double> animation,
            Animation<double> secondaryAnimation,
          ) {
            return enterPage;
          } ,
          transitionsBuilder: (
            BuildContext context,
            Animation<double> animation,
            Animation<double> secondaryAnimation,
            Widget child,
          ) {
              var curvedAnimation = CurvedAnimation(
              parent: animation,
              curve: Curves.ease,
              );
              return Stack(
                children: <Widget>[
                  SlideTransition(
                    position: new Tween<Offset>(
                      begin: const Offset(0.0, 0.0),
                      end: const Offset(-1.0, 0.0),
                    ).animate(curvedAnimation),
                    child: exitPage,
                  ),
                  SlideTransition(
                    position: new Tween<Offset>(
                      begin: const Offset(1.0, 0.0),
                      end: Offset.zero,
                    ).animate(curvedAnimation),
                    child: child,
                  )
                ],
              );
          }
        );
}