如何在加载其余小部件之前执行函数onPressed()？

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  @override
  void initState() {
    super.initState();
    onPressed();
  }

  Future<void> onPressed() async {
    // 执行需要在加载其余小部件之前完成的操作
    await Future.delayed(Duration(seconds: 1));
    print('onPressed executed');
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      // 构建其余小部件
    );
  }
}