vue中identify(生成图片验证码)插件的配置和使用

效果图

1.在vue项目的 src/ components文件夹下新建 identify.vue 文件，写入如下代码

<template>
  <div class="s-canvas">
    <canvas id="s-canvas" :width="contentWidth" :height="contentHeight"></canvas>
  </div>
</template>
<script>
export default {
  name: 'SIdentify',
  props: {
    identifyCode: { // 默认注册码
      type: String,
      default: '1234'
    },
    fontSizeMin: { // 字体最小值
      type: Number,
      default: 25
    },
    fontSizeMax: { // 字体最大值
      type: Number,
      default: 35
    },
    backgroundColorMin: { // 验证码图片背景色最小值
      type: Number,
      default: 200
    },
    backgroundColorMax: { // 验证码图片背景色最大值
      type: Number,
      default: 220
    },
    dotColorMin: { // 背景干扰点最小值
      type: Number,
      default: 60
    },
    dotColorMax: { // 背景干扰点最大值
      type: Number,
      default: 120
    },
    contentWidth: { // 容器宽度
      type: Number,
      default: 116
    },
    contentHeight: { // 容器高度
      type: Number,
      default: 38
    }
  },
  methods: {
    // 生成一个随机数
    randomNum (min, max) {
      return Math.floor(Math.random() * (max - min) + min)
    },
    // 生成一个随机的颜色
    randomColor (min, max) {
      let r = this.randomNum(min, max)
      let g = this.randomNum(min, max)
      let b = this.randomNum(min, max)
      return 'rgb(' + r + ',' + g + ',' + b + ')'
    },
    drawPic () {
      let canvas = document.getElementById('s-canvas')
      let ctx = canvas.getContext('2d')
      ctx.textBaseline = 'bottom'
      // 绘制背景
      ctx.fillStyle = this.randomColor(this.backgroundColorMin, this.backgroundColorMax)
      ctx.fillRect(0, 0, this.contentWidth, this.contentHeight)
      // 绘制文字
      for (let i = 0; i < this.identifyCode.length; i++) {
        this.drawText(ctx, this.identifyCode[i], i)
      }
      this.drawLine(ctx)
      this.drawDot(ctx)
    },
    drawText (ctx, txt, i) {
      ctx.fillStyle = this.randomColor(50, 160) // 随机生成字体颜色
      ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei' // 随机生成字体大小
      let x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1))
      let y = this.randomNum(this.fontSizeMax, this.contentHeight - 5)
      var deg = this.randomNum(-30, 30)
      // 修改坐标原点和旋转角度
      ctx.translate(x, y)
      ctx.rotate(deg * Math.PI / 180)
      ctx.fillText(txt, 0, 0)
      // 恢复坐标原点和旋转角度
      ctx.rotate(-deg * Math.PI / 180)
      ctx.translate(-x, -y)
    },
    drawLine (ctx) {
      // 绘制干扰线
      for (let i = 0; i < 4; i++) {
        ctx.strokeStyle = this.randomColor(100, 200)
        ctx.beginPath()
        ctx.moveTo(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight))
        ctx.lineTo(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight))
        ctx.stroke()
      }
    },
    drawDot (ctx) {
      // 绘制干扰点
      for (let i = 0; i < 30; i++) {
        ctx.fillStyle = this.randomColor(0, 255)
        ctx.beginPath()
        ctx.arc(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight), 1, 0, 2 * Math.PI)
        ctx.fill()
      }
    }
  },
  watch: {
    identifyCode () {
      this.drawPic()
    }
  },
  mounted () {
    this.drawPic()
  }
}
</script>

<style scoped>
</style>

2. 在组件中使用

方便你复制~~~~~

<template>
  <div class="inventoryRecord">
    <h1>{{ msg }}</h1>
    <div @click="changeCode()">
      <!-- 引入验证码组件 -->
      <identify :identifyCode="identifyCode"></identify>
    </div>
  </div>
</template>

<script>
// 引入验证码组件
import identify from '../../components/identify.vue'
export default {
  name: 'inventoryRecord',
  // 注册验证码组件
  components: { identify },
  data () {
    return {
      msg: 'Welcome to Your Vue.js App商品库存编辑记录',
      passWord: '123456',
      // 验证码初始值
      identifyCode: '1234',
      // 验证码的随机取值范围
      identifyCodes: '1234567890'
    }
  },
  mounted () {
    let data = this.$md5(this.passWord)
    console.log(data)// e10adc3949ba59abbe56e057f20f883e
    // 刷新页面就生成随机验证码
    this.identifyCode = ''
    this.makeCode(this.identifyCodes, 4)
  },
  methods: {
    // 点击验证码刷新验证码
    changeCode () {
      this.identifyCode = ''
      this.makeCode(this.identifyCodes, 4)
    },
    // 生成一个随机整数  randomNum(0, 10) 0 到 10 的随机整数， 包含 0 和 10
    randomNum (min, max) {
      max = max + 1
      return Math.floor(Math.random() * (max - min) + min)
    },
    // 随机生成验证码字符串
    makeCode (data, len) {
      for (let i = 0; i < len; i++) {
        this.identifyCode += data[this.randomNum(0, data.length - 1)]
      }
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
</style>