fix: 优化播放页面章节列表

lib/shared/hooks.dart

@@ -3,6 +3,11 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 
+// useEffect((){}, []) 组件构建之后执行，但并不保证布局已经完成
+
+// 自定义
+// useLayoutEffect((){}) 组件布局完成之后执行 仅执行一次
+
 void useInterval(VoidCallback callback, Duration delay) {
   final savedCallback = useRef(callback);
   savedCallback.value = callback;
@@ -28,3 +33,18 @@ void useTimer(VoidCallback callback, Duration delay) {
     [delay],
   );
 }
+
+void useLayoutEffect(VoidCallback callback) {
+  final savedCallback = useRef(callback);
+  savedCallback.value = callback;
+
+  useEffect(
+    () {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        savedCallback.value();
+      });
+      return null;
+    },
+    [],
+  );
+}