iframe内嵌页面——跨域通讯

<template>
  <div class="act-form">
    <iframe
      :src="src"
      ref="iframe"
      frameborder="no"
      align="middle"
      width="100%"
      height="600px"
      scrolling="auto" />
    <el-button @click="sendMessage">向iframe发送信息</el-button>
  </div>
</template>
<script>
export default {
  data () {
    return {
      src: '',
      iframeWin: null,
      isLoaded: false
    }
  },
  created () {
        this.src = 'http://odp.oa.com'

　　//获取iframe
　　var oIframe=document.getElementsByTagName('iframe')[0];

　　//获取iframe中的元素
　　var oText=oIframe.contentWindow.document.getElementById('navContent');

　　//改变iframe中元素的属性
　　oIframe.contentWindow.document.getElementById('navContent').style.color='red';

  },
  mounted () {
    // 在外部vue的window上添加postMessage的监听，并且绑定处理函数handleMessage
    window.addEventListener('message', this.handleMessage)
    this.iframeWin = this.$refs.iframe.contentWindow
  },
  methods: {
    sendMessage () {
      console.log(this.iframeWin, 1111111)
      this.iframeWin.postMessage({
        cmd: 'getFormJson',
        params: {}
      }, '*')
    },
    async handleMessage (event) {
      // console.log(event, 222222)
      const data = event.data
      // console.log(data, 333333)
      switch (data.cmd) {
      case 'returnFormJson':
        break
      case 'returnHeight':
        break
      }
    },
    async enroll (data) {
      console.log('4444444')
    }
  }
}
</script>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>iframe Window</title>
    <style>
        body {
            background-color: #D53C2F;
            color: white;
        }
    </style>
</head>
<body>

    <h1>Hello there, i'm an iframe</h1>

    <script>
        // 向父vue页面发送信息
        window.parent.postMessage({
          cmd: 'returnHeight',
          params: {
            success: true,
            data: document.body.scrollHeight + 'px'
          }
        }, '*')
        // 接受父页面发来的信息
        window.addEventListener('message', function (event) {
          var data = event.data
          switch (data.cmd) {
          case 'getFormJson':
            // 处理业务逻辑
            break
          }
        })
    </script>
</body>
</html>

iframe内嵌页面——跨域通讯

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