import 'package:flutter/widgets.dart';
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class KeepAliveWrapper extends StatefulWidget {
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const KeepAliveWrapper({
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Key? key,
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this.keepAlive = true,
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required this.child,
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}) : super(key: key);
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final bool keepAlive;
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final Widget child;
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@override
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_KeepAliveWrapperState createState() => _KeepAliveWrapperState();
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}
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class _KeepAliveWrapperState extends State<KeepAliveWrapper>
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with AutomaticKeepAliveClientMixin {
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@override
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Widget build(BuildContext context) {
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super.build(context);
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return widget.child;
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}
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@override
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void didUpdateWidget(covariant KeepAliveWrapper oldWidget) {
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if (oldWidget.keepAlive != widget.keepAlive) {
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// keepAlive 状态需要更新，实现在 AutomaticKeepAliveClientMixin 中
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updateKeepAlive();
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}
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super.didUpdateWidget(oldWidget);
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}
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@override
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bool get wantKeepAlive => widget.keepAlive;
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}
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