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vue-esign's Introduction

vue-esign

Canvas 手写签字 电子签名

npm GitHub package.json version

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. 示例demo

安装

npm install vue-esign --save

使用

  1. main.js 中引入
import vueEsign from 'vue-esign'
Vue.use(vueEsign)
  1. 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;

<vue-esign ref="esign" :width="800" :height="300" :isCrop="isCrop" :lineWidth="lineWidth" :lineColor="lineColor" :bgColor.sync="bgColor" />
<button @click="handleReset">清空画板</button> 
<button @click="handleGenerate">生成图片</button>
data () {
  return {
    lineWidth: 6,
    lineColor: '#000000',
    bgColor: '',
    resultImg: '',
    isCrop: false
  }
},
methods: {
  handleReset () {
    this.$refs.esign.reset()
  },
  handleGenerate () {
    this.$refs.esign.generate().then(res => {
      this.resultImg = res
    }).catch(err => {
      alert(err) // 画布没有签字时会执行这里 'Not Signned'
    })
  }
}
  1. 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 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

两个内置方法,通过给组件设置 ref 调用:

清空画布

this.$refs.esign.reset()

生成图片

this.$refs.esign.generate().then(res => {
  console.log(res) // base64图片
}).catch(err => {
  alert(err) // 画布没有签字时会执行这里 'Not Signned'
})

vue-esign's People

Contributors

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Watchers

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