vue随机验证码组件的封装实现

本文实例为大家分享了vue随机验证码组件的具体代码，供大家参考，具体内容如下

由于工作需要自己做了一个验证码组件，灵活性不高，但是可以用，代码也不太复杂

<template>
 <div style="display: flex;justify-content: start;align-items: center;border-radius: 4px">
 <canvas style="" :width="contentWidth" :height="contentHeight" id="cav" @click="next()"></canvas>
 </div>
</template>

<script>
// import num from './components/cc'
export default {
 name: 'verificationCode',
 props: {
 fontSize: {
  type: Number,
  default: 20
 },
 contentWidth: {
  type: Number,
  default: 100
 },
 contentHeight: {
  type: Number,
  default: 40
 },
 verification: {
  type: String
 },
 refreshCode: {
  type: Boolean
 }
 },
 watch: {
 verification: function (newVal) {
  if (newVal.toLowerCase() === this.identify.toLowerCase()) {
  this.$emit('handleIdentify', true)
  } else {
  this.$emit('handleIdentify', false)
  }
 },
 refreshCode: function (newVal) {
  this.draw()
 }
 },
 mounted () {
 this.draw()
 },
 data () {
 return {
  identify: '',
  letter: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
 }
 },
 methods: {
 draw () {
  let self = this
  let text = this.randomNum()
  this.identify = text.join('')
  let ctx = document.getElementById('cav')
  let cav = ctx.getContext('2d')
  cav.clearRect(0, 0, self.contentWidth, self.contentHeight)
  let w = ctx.width
  let h = ctx.height
  cav.textBaseline = 'bottom'
  self.drawText(cav, text[0], 10, 10, self.randomDeg(0, 0.1), 20)
  self.drawText(cav, text[1], 20, 10, self.randomDeg(0, 0.1))
  self.drawText(cav, text[2], 25, 10, self.randomDeg(0, 0.1))
  self.drawText(cav, text[3], 30, 10, self.randomDeg(0, 0.1))
  let i
  for (i = 0; i < 3; i++) {
  self.drawLine(cav, self.randomDeg(0, 0.3 * w, 1), self.randomDeg(0, h, 1), self.randomDeg(0, w, 1), self.randomDeg(0, h, 1), self.randomDeg(0.8 * w, w, 1), self.randomDeg(0, h, 1))
  }
 },
 drawText (cav, text, x1, y1, route) {
  cav.beginPath()
  cav.fillStyle = '#ffe9db'
  cav.font = this.fontSize + 'px' + ' ' + '黑体'
  cav.translate(x1, y1)
  cav.rotate(Math.PI * route)
  cav.fillText(text, x1, y1)
  cav.fill()
  cav.rotate(-Math.PI * route)
  cav.translate(-(x1), -(y1))
 },
 drawLine (cav, x1, y1, x2, y2, x3, y3) {
  cav.beginPath()
  cav.strokeStyle = 'rgb(155, 204, 237)'
  cav.bezierCurveTo(x1, y1, x2, y2, x3, y3)
  cav.stroke()
 },
 randomNum () { // 生成随机字
  let i
  let letter = this.letter
  let text = []
  for (i = 0; i < 4; i++) {
  text.push(letter[Math.floor(Math.random() * 36)])
  }
  return text
 },
 randomDeg (min, max, f) { // 设置文字倾斜角度
  f = undefined ? Math.random() > 0.5 ? 1 : -1 : 1
  return f * (Math.random() * (max - min) + min)
 },
 next () {
  this.draw()
 }
 }
}
</script>

<style scoped>

</style>

样式什么的自己可以调一调，效果如下：

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