Vue父组件调用子组件事件

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')
        }
    }
}

ref="child" @click="click">

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