新增 with AutomaticKeepAliveClientMixin
并实现 bool get wantKeepAlive=>true; 来回切换界面 不会重置界面
class _OrderContentListState extends State<OrderContentList> with AutomaticKeepAliveClientMixin {
//防止页面重置
新增 with AutomaticKeepAliveClientMixin
并实现 bool get wantKeepAlive=>true; 来回切换界面 不会重置界面
class _OrderContentListState extends State<OrderContentList> with AutomaticKeepAliveClientMixin {
//防止页面重置
本文标题：切换界面时 界面会重置问题
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