Vue父组件调用子组件事件方法

export default {
  mounted: function () {
   this.$nextTick(function () {
    this.$on('childMethod', function () {
     console.log('监听成功')
    })
   })
  }，
  methods {
    callMethod () {
     console.log('调用成功')
    }
  }
}

<child ref="child" @click="click"></child>

export default {
  methods: {
   click () {
   this.$refs.child.$emit('childMethod') // 方法1
   this.$refs.child.callMethod() // 方法2
  },
  components: {
   child: child
  }
}