flutter - Flutter Scaffold Appbar不显示后退按钮

我的类(class)没有在AppBar中显示后退按钮，

已经尝试将this.automaticallyImplyLeading = true，

import 'package:carros/pages/carro/carro.dart';
import 'package:flutter/material.dart';

class CarroPage extends StatelessWidget {
  Carro carro;
  CarroPage(this.carro);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(carro.nome),
      ),
      body: _body(),
    );
  }

  _body() {
    return Image.network(carro.urlFoto);
  }
}

最佳答案

尝试制作自己的后退按钮:

     appBar: AppBar(
                    leading: IconButton(
                    icon: Icon(Icons.arrow_back_ios),
                    iconSize: 20.0,
                    onPressed: () {
                      _goBack(context);
                    },
                  ),
                  centerTitle: true,
                  title: Text('carro.nome')),

 _goBack(BuildContext context) {
Navigator.pop(context);

}