Flutter购物车更新插件flexi_cart_updater的使用

轻松管理电子商务应用中的购物车图标和徽章，并通过调用单行代码即可更新和显示。

特性

• 只需在应用中定义一次值
• 随处显示购物车图标只需一行代码
• 轻松增加和减少购物车数量，并且该变化会反映在整个应用中

安装

在你的 Flutter 项目中的 pubspec.yaml 文件里添加以下依赖：

dependencies:
  flexiCart_updater: ^1.0.6

然后运行 flutter pub get 来获取新的依赖。

使用

初始化插件

在主文件中初始化插件。如果你希望直接分配材料颜色，可以将代码写在主文件或 initState 方法中：

void main() async {
  // 初始化FlexiCart插件
  FlexiCart.initFlexiCart(
    child: const Icon(Icons.shopping_cart_outlined, size: 25, color: Colors.black54),
    cartCount: 2,
    cartBadgeTextColor: Colors.white,
    cartBadgeBackgroundColor: Colors.blueAccent
  );

  runApp(const MyApp());
}

显示购物车小部件

在 AppBar 中显示购物车图标：

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'flexi_cart_updater',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'flexi_cart_updater demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
        actions: [
          Icon(Icons.search, size: 25, color: Colors.black54),
          FlexiCart.cart(onTap: () {
            print("Navigate to your cart screen here");
          }),
        ],
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            FlexiCart.cart(onTap: () {
              print("Navigate to your cart screen here");
            }),
            ElevatedButton(
              onPressed: () => FlexiCart.add(),
              child: Text("Add to Cart"),
            ),
            const SizedBox(height: 10),
            ElevatedButton(
              onPressed: () => FlexiCart.remove(),
              child: Text("Remove from Cart"),
            ),
            const SizedBox(height: 10),
            ElevatedButton(
              onPressed: () => FlexiCart.clear(),
              child: Text("Clear cart"),
            ),
            const SizedBox(height: 10),
            ElevatedButton(
              onPressed: () => FlexiCart.update(newCartCount: 4),
              child: Text("Update cart with new value 4"),
            ),
          ],
        ),
      ),
    );
  }
}

增加购物车数量

FlexiCart.add();

减少购物车数量

FlexiCart.remove();

清空购物车

FlexiCart.clear();

更新购物车数量

FlexiCart.update(newCartCount: 4);

示例代码

以下是完整的示例代码：

import 'package:flutter/material.dart';
import 'package:flexi_cart_updater/flexi_cart_updater.dart';

void main() {
  // 初始化FlexiCart插件
  FlexiCart.initFlexiCart(
    child: const Icon(Icons.shopping_cart_outlined, size: 25, color: Colors.black54),
    cartCount: 2,
    cartBadgeTextColor: Colors.white,
    cartBadgeBackgroundColor: Colors.blueAccent
  );

  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'flexi_cart_updater',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'flexi_cart_updater demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
        actions: [
          Icon(Icons.search, size: 25, color: Colors.black54),
          FlexiCart.cart(onTap: () {
            print("Navigate to your cart screen here");
          }),
        ],
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            FlexiCart.cart(onTap: () {
              print("Navigate to your cart screen here");
            }),
            ElevatedButton(
              onPressed: () => FlexiCart.add(),
              child: Text("Add to Cart"),
            ),
            const SizedBox(height: 10),
            ElevatedButton(
              onPressed: () => FlexiCart.remove(),
              child: Text("Remove from Cart"),
            ),
            const SizedBox(height: 10),
            ElevatedButton(
              onPressed: () => FlexiCart.clear(),
              child: Text("Clear cart"),
            ),
            const SizedBox(height: 10),
            ElevatedButton(
              onPressed: () => FlexiCart.update(newCartCount: 4),
              child: Text("Update cart with new value 4"),
            ),
          ],
        ),
      ),
    );
  }
}