路由生命周期状态

lib/11/transition.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+
+RouteTransitionsBuilder kSlideBottomToTopWithSecondary = (
+  BuildContext context,
+  Animation<double> animation,
+  Animation<double> secondaryAnimation,
+  Widget child,
+) {
+  return SlideTransition(
+    position: Tween<Offset>(
+      begin: const Offset(0.0, 1.0),
+      end: Offset.zero,
+    ).animate(animation),
+    child: SlideTransition(
+      position: Tween<Offset>(
+        begin: Offset.zero,
+        end: const Offset(0.0, 1.0),
+      ).animate(secondaryAnimation),
+      child: child,
+    ),
+  );
+};