64 lines
1.8 KiB
Dart
64 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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class EmergencyOverlay extends StatefulWidget {
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const EmergencyOverlay({super.key});
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@override
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State<EmergencyOverlay> createState() => _EmergencyOverlayState();
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}
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class _EmergencyOverlayState extends State<EmergencyOverlay>
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with SingleTickerProviderStateMixin {
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late AnimationController _controller;
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late Animation<double> _opacityAnimation;
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@override
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void initState() {
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super.initState();
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// 设置动画循环时间，例如 600ms 闪烁一次
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_controller = AnimationController(
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vsync: this,
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duration: const Duration(milliseconds: 600),
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)..repeat(reverse: true); // 反转运行实现呼吸效果
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_opacityAnimation = Tween<double>(
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begin: 0.0,
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end: 0.5,
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).animate(CurvedAnimation(parent: _controller, curve: Curves.easeInOut));
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return AnimatedBuilder(
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animation: _opacityAnimation,
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builder: (context, child) {
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return IgnorePointer(
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// 极其重要：确保光晕不遮挡下方的点击事件
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child: Container(
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decoration: BoxDecoration(
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// 使用径向渐变，让四周红，中间透明
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border: Border.all(
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color: Colors.red.withOpacity(_opacityAnimation.value),
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width: 20, // 边框宽度决定了红边的厚度
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),
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boxShadow: [
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BoxShadow(
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color: Colors.red.withOpacity(_opacityAnimation.value),
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blurRadius: 40,
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spreadRadius: 10,
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),
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],
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),
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),
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);
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},
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);
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}
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}
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