mod: 播放器实例销毁、页面层级

lib/common/widgets/app_bar_ani.dart

@@ -1,57 +0,0 @@
-import 'package:flutter/material.dart';
-
-class AppBarAni extends StatelessWidget implements PreferredSizeWidget {
-  const AppBarAni({
-    required this.child,
-    required this.controller,
-    required this.visible,
-    this.position,
-    Key? key,
-  }) : super(key: key);
-
-  final PreferredSizeWidget child;
-  final AnimationController controller;
-  final bool visible;
-  final String? position;
-
-  @override
-  Size get preferredSize => child.preferredSize;
-
-  @override
-  Widget build(BuildContext context) {
-    visible ? controller.reverse() : controller.forward();
-    return SlideTransition(
-      position: Tween<Offset>(
-        begin: Offset.zero,
-        end: Offset(0, position! == 'top' ? -1 : 1),
-      ).animate(CurvedAnimation(
-        parent: controller,
-        curve: Curves.easeInOut,
-      )),
-      child: Container(
-        decoration: BoxDecoration(
-          gradient: position! == 'top'
-              ? const LinearGradient(
-                  begin: Alignment.bottomCenter,
-                  end: Alignment.topCenter,
-                  colors: <Color>[
-                    Colors.transparent,
-                    Colors.black45,
-                  ],
-                  tileMode: TileMode.clamp,
-                )
-              : const LinearGradient(
-                  begin: Alignment.topCenter,
-                  end: Alignment.bottomCenter,
-                  colors: <Color>[
-                    Colors.transparent,
-                    Colors.black45,
-                  ],
-                  tileMode: TileMode.mirror,
-                ),
-        ),
-        child: child,
-      ),
-    );
-  }
-}