【Flutter】【widget】Chip 标签的使用

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前言

RawChip 的封装有如下：

• Chip
• InputChip
• ChoiceChip
• FilterChip
• ActionChip

一般使用RawChip 可以完成很多很多的

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一、Clip 是什么？

夹子

二、使用步骤

1.使用

代码如下（示例）：

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns
import warnings
warnings.filterwarnings('ignore')
import  ssl
ssl._create_default_https_context = ssl._create_unverified_context

2.读入数据

代码如下（示例）：

import 'package:flutter/material.dart';

void main() {
    
    
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    
    
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
    
    
  bool rawChipSelect = false; //RawChip 是否被选中的初始状态为未选择false
  bool chipSelect = false; //RawChip 是否被选中的初始状态为未选择false
  int choiceIndex = 0; //默认选中的

  @override
  Widget build(BuildContext context) {
    
    
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Chip(
              label: const Text("Chip"),
              backgroundColor: Colors.amberAccent,
              labelStyle: const TextStyle(fontWeight: FontWeight.bold),
              deleteIcon:
                  const Icon(Icons.delete), //删除图标，有 onDeleted 方法的时候才生效显示
              avatar: const Icon(Icons.usb_rounded), //前置图标
              deleteButtonTooltipMessage: '要删除的提示信息', //长按文本提示内容

              onDeleted: () {
    
    
                print('onDeleted');
              },
              elevation: 8,
              shadowColor: Colors.redAccent, //阴影的颜色
            ),
            RawChip(
              backgroundColor: Colors.amberAccent,
              labelStyle: const TextStyle(fontWeight: FontWeight.bold),
              deleteIcon:
                  const Icon(Icons.delete), //删除图标，有 onDeleted 方法的时候才生效显示
              avatar: const Icon(Icons.usb_rounded), //前置图标
              onDeleted: () {
    
    
                print('onDeleted');
                setState(() {
    
    
                  rawChipSelect = false;
                });
              },
              label: const Text("RawChip"),
              onSelected: (value) {
    
    
                debugPrint("onSelected $value");
                rawChipSelect = value;
                setState(() {
    
    });
              },
              selected: rawChipSelect,
              selectedColor: Colors.redAccent, //选择的原色
              selectedShadowColor: Colors.green, //选择的时候的阴影的颜色
              elevation: 20,
              shadowColor: Colors.redAccent, //阴影的颜色
            ),
            for (int i = 0; i < 3; i++)
              ChoiceChip(
                backgroundColor: Colors.green,
                selectedColor: Colors.pink,
                avatar: const Icon(Icons.run_circle),
                label: const Text('ChoiceChip'),
                selected: choiceIndex == i, //是否是被选中的状态
                onSelected: (ValueKey) {
    
    
                  choiceIndex = i;
                  setState(() {
    
    });
                },
              ),
          ],
        ),
      ),
// This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

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总结

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