flutter基础知识

 

导航的数据传递与接收

import 'package:flutter/material.dart';

class Product {
  final String title; // 商品标题
  final String description; // 商品描述
  Product(this.title, this.description);
}

void main() {
  runApp(MaterialApp(
    title: '导航的数据传递与接收',
    home: ProductList(
        products:
            List.generate(20, (i) => Product('阿强 商品 $i', '这是商品详情，ID：$i'))),
  ));
}

class ProductList extends StatelessWidget {
  final List<Product> products;
  ProductList({Key key, @required this.products}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('商品列表'),
      ),
      body: ListView.builder(
        itemCount: products.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(products[index].title),
            onTap: () {
              Navigator.push(
                  context,
                  MaterialPageRoute(
                      builder: (context) =>
                          ProductDetail(product: products[index])));
            },
          );
        },
      ), // 动态构建
    );
  }
}

class ProductDetail extends StatelessWidget {
  final Product product;
  ProductDetail({Key key, @required this.product}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('${product.title}'),
        ),
        body: Center(child: Text('${product.description}')));
  }
}