使用 Vant Weapp

Taro3 支持使用 Vant Weapp 组件库进行开发，示例仓库：taro3-vant-sample。

注意：使用原生第三方组件库进行开发的项目，不再具有多端转换的能力。

如何使用

配置忽略 vant 的样式尺寸转换

如果直接使用 vant 组件，会发现样式偏小的情况，这是因为 Taro 默认将 vant 的样式尺寸从 px 转换为了 rpx，可以通过配置 selectorblacklist 来禁止转换。

配置方法：

// config/index.js
const config = {
  // ...
  mini: {
    postcss: {
      pxtransform: {
        enable: true,
        config: {
          selectorBlackList: [/van-/]
        }
      }
    }
  },
}

配置 copy 小程序原生文件

vant 组件中包含一些小程序原生文件的依赖，目前 Taro 没有对这些依赖进行分析。因此需要配置 copy 把这些依赖移动到 dist 目录中，例如需要 copy wxs 和样式文件，部分配置如下

// config/index.js
const config = {
  // ...
  copy: {
    patterns: [
      { from: 'src/components/vant-weapp/dist/wxs', to: 'dist/components/vant-weapp/dist/wxs' },
      { from: 'src/components/vant-weapp/dist/common/style', to: 'dist/components/vant-weapp/dist/common/style' },
      { from: 'src/components/vant-weapp/dist/common/index.wxss', to: 'dist/components/vant-weapp/dist/common/index.wxss' },
      { from: 'src/components/vant-weapp/dist/calendar/index.wxs', to: 'dist/components/vant-weapp/dist/calendar/index.wxs' },
      { from: 'src/components/vant-weapp/dist/calendar/utils.wxs', to: 'dist/components/vant-weapp/dist/calendar/utils.wxs' },
      { from: 'src/components/vant-weapp/dist/calendar/calendar.wxml', to: 'dist/components/vant-weapp/dist/calendar/calendar.wxml' },
      { from: 'src/components/vant-weapp/dist/calendar/components/month/index.wxs', to: 'dist/components/vant-weapp/dist/calendar/components/month/index.wxs' },
    ],
    options: {
    }
  },
}

引用 vant 组件

首先需要在 app 的 config 或页面的 config 文件中配置 usingComponents 字段，如：

export default {
  navigationBarTitleText: '首页',
  usingComponents: {
    'van-button': '../../components/vant-weapp/dist/button/index'
  }
}

然后在页面中便可以直接使用。

使用 vant 组件

1. 绑定属性

• React
• Vue

import React, { Component } from 'react'
import { View } from '@tarojs/components'
export default class Index extends Component {
  render () {
    return (
      <View>
        <van-button type='primary' loading loading-text='ing'>Button</van-button>
      </View>
    )
  }
}

<template>
  <view>
    <van-button type='primary' :loading='true' loading-text='ing'>Button</van-button>
  </view>
</template>
<script>
export default {
  name: 'index'
}
</script>

注意：如果组件的某些属性在 vant 文档里写着带有默认值 true，在 Taro 中使用时仍然需要显式设置为 true。

2. 绑定事件

• React
• Vue

import React, { Component } from 'react'
import { View } from '@tarojs/components'
export default class Index extends Component {
  handleClick = () => {
    console.log('click')
  }
  onAfterRead = res => {
    console.log(res)
  }
  render () {
    return (
      <View>
        // 对应 bind:click 事件
        <van-button type='primary' onClick={this.handleClick} >Button</van-button>
        // 对应 bind:after-read 事件
        <van-uploader fileList={[]} onAfterRead={this.onAfterRead} />
      </View>
    )
  }
}

<template>
  <view>
    <van-button type='primary' @click='handleClick'>Button</van-button>
    <van-uploader :fileList='[]' @after-read='onAfterRead' />
  </view>
</template>
<script>
export default {
  methods: {
    handleClick () {
      console.log('click')
    },
    onAfterRead (res) {
      console.log(res)
    }
  }
}
</script>

3. Slot

• React
• Vue

import React, { Component } from 'react'
import { View, Slot } from '@tarojs/components'
export default class Index extends Component {
  render () {
    return (
      <View>
        <van-calendar poppable show>
          <Slot name='title'>
            <View>Hello world</View>
          </Slot>
        </van-calendar>
      </View>
    )
  }
}

<template>
  <view>
    <van-calendar :poppable='true' :show='true'>
      <slot-view :name='"title"'>
        <view>Hello world</view>
      </slot-view>
    </van-calendar>
  </view>
</template>
<script>
export default {
  name: 'index'
}
</script>