渲染streamBuilder之前的延迟

import 'package:flutter/material.dart';

class DelayedStreamBuilderExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      future: Future.delayed(Duration(seconds: 2)), // 模拟延迟2秒
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          // 显示加载中的状态
          return Center(
            child: CircularProgressIndicator(),
          );
        } else {
          // Future完成后，渲染StreamBuilder
          return StreamBuilder(
            stream: myStream, // 替换为实际的数据流
            builder: (context, snapshot) {
              // 根据数据流中的数据变化来更新UI界面
              // ...
            },
          );
        }
      },
    );
  }
}