vue-子组件向父组件传值

子组件注册触发事件，父组件注册 触发子组件事件后的方法写在method里面 
父组件这么写

<component-a  v-on:child-say="listenToMyBoy"></component-a>
<p>Do you like me? {{childWords}}</p>
 methods: {
            listenToMyBoy: function (somedata){
              this.childWords = somedata
            }
        }

子组件component-a这么写

<button v-on:click="onClickMe">like!</button>

methods: {
      onClickMe: function(){
        this.$emit('child-say',this.somedata);
      }
    }

转载于:https://my.oschina.net/Tongyingcheng/blog/889423