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vue3-esign

v1.0.6

Published

A canvas signature component of vue

Downloads

83

Readme

vue3-esign

基于 vue-esignvue3ts 改造版本。

Canvas 手写签字 电子签名

npm GitHub package.json version

安装

# 推荐使用 ni 和 taze 来管理项目依赖
# https://github.com/antfu/ni
# https://github.com/antfu/taze
npm i -g @antfu/ni

# https://github.com/liwenfengg/vue3-esign
ni vue3-esign -S

功能

  1. 兼容 PC 和 Mobile;
  2. 画布自适应屏幕大小变化(窗口缩放、屏幕旋转时画布无需重置,自动校正坐标);
  3. 自定义画布尺寸(导出图尺寸),画笔粗细、颜色,画布背景色;
  4. 支持裁剪 (针对需求:有的签字需要裁剪掉四周空白)。
  5. 导出图片格式为 base64
  6. demo 示例

使用

  1. 全局使用 、局部

    // 全局 vue3 main.ts
    import { createApp } from 'vue'
    import { Vue3Esign } from 'vue3-esign'
    
    // 局部 vue3 App.vue
    import { Vue3Esign } from 'vue3-esign'
    import App from './App.vue'
    
    const app = createApp(App)
    
    app.use(Vue3Esign)
  2. 页面中使用

    必须设置 ref ,用来调用组件的两个内置方法 reset()generate()

    无需给组件设置 style 的宽高,如果画布的 width属性值没超出父元素的样式宽度,则该组件的样式宽度就是画布宽度,超出的话,组件样式宽度则是父元素的100%; 所以只需设置好父元素的宽度即可;

    <!-- vue3  setup lang="ts" -->
    <Vue3Esign  ref="vueEsignRef" v-model:bgColor="vueEsignBgColor" :is-clear-bg-color="false" :width="800"
    :height="400" :is-crop="isCrop" :line-width="lineWidth" :line-color="lineColor" />
    
    <button @click="esignReset">清空画板</button>
    
    <button @click="create">生成图片</button>
    
    import { Vue3Esign } from '~/export'
    
    const vueEsignRef = ref<any>(null)
    const vueEsignBgColor = ref<string>('rgba(210,210,210,1)')
    const lineWidth = ref(6)
    const lineColor = ref('#000000')
    const isCrop = ref(false)
    const img = ref('')
    
    const esignReset = async () => {
      vueEsignRef.value.reset()
    }
    
    const create = async () => {
      console.log('vueEsignRef', vueEsignRef.value)
      try {
        const res = await vueEsignRef.value.generate()
        console.log('res', res)
    
        img.value = res
      }
      catch (error) {
        console.error('error', error)
    
        img.value = ''
      }
    }
  3. 说明

    | 属性 | 类型 | 默认值 | 说明 | | :------------- | :-----: | :-----: | :------------------------------------------------------------------ | | width | Number | 800 | 画布宽度,即导出图片的宽度 | | height | Number | 300 | 画布高度,即导出图片的高度 | | lineWidth | 4 | Number | 画笔粗细 | | lineColor | String | #000000 | 画笔颜色 | | bgColor | String | 空 | 画布背景色,为空时画布背景透明,支持多种格式 | | | | | '#ccc','#E5A1A1','rgb(229, 161, 161)','rgba (0,0,0,.6)','red' | | isCrop | Boolean | false | 是否裁剪,在画布设定尺寸基础上裁掉四周空白部分 | | isClearBgColor | Boolean | true | 清空画布时(reset)是否同时清空设置的背景色(bgColor) |

    两个内置方法(defineExpose({ generate, reset })),通过给组件设置 ref 调用:

    清空画布 reset

    vueEsignRef.value.reset()

    生成图片 generate

    const res = await vueEsignRef.value.generate()
    console.log('res', res)
    img.value = res

    demo.gif