初始化

lib/widgets/base/transition/slide_hide.dart

@@ -0,0 +1,70 @@
+import 'package:flutter/material.dart';
+
+enum SlideDirection { up, down }
+
+class SlideHide extends StatefulWidget {
+  final Widget child;
+  final bool hide; // 是否隐藏
+  final SlideDirection direction;
+  final Duration duration;
+
+  const SlideHide({
+    super.key,
+    required this.child,
+    this.hide = false,
+    this.direction = SlideDirection.up,
+    this.duration = const Duration(milliseconds: 200),
+  });
+
+  @override
+  State<SlideHide> createState() => _SlideHideState();
+}
+
+class _SlideHideState extends State<SlideHide> with SingleTickerProviderStateMixin {
+  late final AnimationController _controller;
+  late final Animation<Offset> _animation;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      vsync: this,
+      duration: widget.duration,
+    );
+    _animation = Tween<Offset>(
+      begin: Offset.zero,
+      end: widget.direction == SlideDirection.up ? const Offset(0, -1) : const Offset(0, 1),
+    ).animate(CurvedAnimation(parent: _controller, curve: Curves.easeInOut));
+
+    if (widget.hide) {
+      _controller.value = 1;
+    }
+  }
+
+  @override
+  void didUpdateWidget(covariant SlideHide oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.hide != widget.hide) {
+      if (widget.hide) {
+        _controller.forward();
+      } else {
+        _controller.reverse();
+      }
+    }
+  }
+
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SlideTransition(
+      position: _animation,
+      child: widget.child,
+    );
+  }
+}