vue-canvas-sign v2.0.8

vue-canvas-sign

❗ vue canvas签名组件（vue canvas sign component），2.x版本为js@3.x组件

❗ 如需在js@2.x中使用，请使用 ，Github v1.x地址
yarn add vue-canvas-sign@^1.0.7
npm i vue-canvas-sign@^1.0.7 -S

示例

demo展示

用法

# 安装依赖
yarn add vue-canvas-sign
# or
npm i vue-canvas-sign -S

使用

<template>
  <!-- 使用方法一 -->
  <CanvasSign ref="canvasSign" imageType="image/png" :width="width" :line-width="lineWidth" :image-qual="0.01" background-color="#EEE" />
  <div>
    <button @click="saveHandle">save</button>
    <button @click="clearHandle">clear</button>
  </div>
  <hr />
  <!-- 使用方法二 -->
  <CanvasSign ref="canvasSign2" :height="400" :width="width" :line-width="lineWidth">
    <template v-slot="{ save, clear }">
      <button @click="() => save(saveCallback)">save</button>
      <button @click="() => clearWithSlotHandle(clear)">clear</button>
    </template>
  </CanvasSign>
  <hr />
  <!-- 生成图片展示 -->
  <img :src="imgSrc" alt="生成的图片" />
</template>
<script lang="ts">
import { defineComponent, onMounted, ref } from 'vue'
import CanvasSign, { ICanvasSign } from './canvas-sign'

const blankimg = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVQYV2NgAAIAAAUAAarVyFEAAAAASUVORK5CYII='
export default defineComponent({
  components: { CanvasSign },
  setup () {
    const imgSrc = ref(blankimg)
    const canvasSign = ref<ICanvasSign>()
    const canvasSign2 = ref<typeof CanvasSign>()
    // or
    // const canvasSign = ref<typeof CanvasSign>()

    // slot中save方法回调
    const saveCallback = (imgBase64?: string) => {
      imgSrc.value = imgBase64 || blankimg
    }
    // 不使用slot的save方法
    const saveHandle = () => {
      canvasSign.value?.save((img?: string) => {
        imgSrc.value = img || blankimg
      })
    }
    // 不使用slot的clear方法
    const clearHandle = () => {
      canvasSign.value?.clear() // 清空图片
      imgSrc.value = blankimg // 清空画布
    }
    // 使用slot的clear方法
    const clearWithSlotHandle = (clear: () => void) => {
      clear && clear() // 清空画布
      imgSrc.value = blankimg // 清空图片
    }

    onMounted(() => {
      window.onresize = () => {
        const w = document.documentElement.clientWidth || document.body.clientWidth
        width.value = w
        lineWidth.value = w / 100
        // 组件参数改变后，通过reset方法使属性生效
        canvasSign.value?.reset()
        canvasSign2.value?.reset()
      }
    })

    return {
      width,
      lineWidth,
      canvasSign,
      canvasSign2,
      imgSrc,
      saveCallback,
      saveHandle,
      clearHandle,
      clearWithSlotHandle
    }
  }
})
</script>

/** 
 * 注册全局组件
 */
import CanvasSign from 'vue-canvas-sign'

app.component('CanvasSign', CanvasSign)
// or
//app.use(CanvasSign)

组件参数

slot