Vue父组件调用子组件方法（栗子）

ref 加在子组件上，用this.ref.子类name 获取到的是组件实例，可以使用组件的所有方法。！！！

项目结构

APP.vue

<template>
  <div id="app">
    <datav />
  </div>
</template>

<script>
import datav from './components/test/index'
// import datav from './components/datav/index.vue'
// import datav from './components/offlineborad/index.vue'
// import datav from './components/offlineborad1/index.vue'
// import datav from './components/offlineborad2/index.vue'
// import datav from './components/offlineborad3/index.vue'
// import datav from './components/offlineborad4/index.vue'
// import datav from './components/offlineborad5/index.vue'
export default {
  name: 'app',
  components: {
    datav
  },
  data () {
    return {}
  }
}
</script>

<style lang="less">
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: #2c3e50;
  width: 100%;
  height: 100%;
}
</style>

index.vue

<template>
    <div>
      <el-button @click="get" >父类按键加一</el-button>
      <son ref="son"></son>
    </div>
</template>

<script>
import son from './son'
export default {
  components: {
    son
  },
  name: 'index',
  methods: {
    get () {
      this.$refs.son.big()
    }
  }
}
</script>

<style scoped>

</style>

son.vue

<template>
    <div>
      子类数值{{count}}
    </div>
</template>

<script>
export default {
  name: 'son',
  data () {
    return {
      count: 0
    }
  },
  methods: {
    big () {
      this.count++
    }
  }
}
</script>

<style scoped>

</style>