Flutter 类似onResume 监听，解决入场动画卡顿(2)

接着完善上一篇内容，上一篇我们是能监听到初次进入路由页面节点，往往还想监听从当前路由跳转到其他路由后，再返回到当前路由页面，上一篇内容就无法满足当前需求了，不过我们完全可以按照上一篇的原理实现这个需求。

直接上代码

/// @author bawomingtian
/// @date 2023/10/16
/// @desc 通过监听路由入场动画完成，判断路由完全进入，可以用来优化在进场动画执行过程中
/// 异步请求数据刷新界面，导致进场动画卡顿的问题
class AsyncState<T extends StatefulWidget> extends State<T> with RouteAwareMixin implements NavigatorObserver {Completer<bool> _resumeCompleter = Completer();@overridevoid didChangeDependencies() {ModalRoute.of(context)!.controller?.addStatusListener((status) {if (status == AnimationStatus.completed) {_resumeCompleter.complete(true);initAsyncLoad();}});super.didChangeDependencies();}@overridevoid initState() {super.initState();Navigator.observer.add(this);}@overridevoid dispose() {Navigator.observer.remove(this);super.dispose();}Future<E> asyncWaitResume<E>(Future<E> future) async {var value = await future;await _resumeCompleter.future;return value;}void initAsyncLoad() {}void resumeAsyncLoad() {}@overrideWidget build(BuildContext context) {return const SizedBox();}@overridevoid didPush(Route route, Route? previousRoute) {if (route is ModalRoute) {route.controller?.addStatusListener((status) {if (status == AnimationStatus.dismissed) {resumeAsyncLoad();}});}super.didPush(route, previousRoute);}}mixin RouteAwareMixin {void didPop(Route route, Route? previousRoute) {}void didPush(Route route, Route? previousRoute) {}void didRemove(Route route, Route? previousRoute) {}void didReplace({Route? newRoute, Route? oldRoute}) {}void didStartUserGesture(Route route, Route? previousRoute) {}void didStopUserGesture() {}@overrideNavigatorState? get navigator => throw UnimplementedError();
}

方法 initAsyncLoad 为第一次进入路由页面回调

方法 resumeAsyncLoad 为从其他路由返回到该路由页面回调

有了这两个方法，我们就可以异步请求一些耗时或者频繁多次调用的接口了，不用担心影响路由跳转动画