微信小程序 this.triggerEvent()的具体使用

<view bind:tap="onLike" class="container">
 <image src="{{like?yesSrc:noSrc}}" />
 <text>{{count}}</text>
</view>

methods: {
    onLike(event) {
      let like = this.properties.like;
      let count = this.properties.count;
      count = like ? count - 1 : count + 1;
      this.setData({
        like: !like,
        count
      })
      let behavior = this.properties.like ? "like" : "cancel";
      this.triggerEvent('like', {
        behavior
      }, {})
    }
  }

<v-like bind:like="onLike" like="{{classicData.like_status}}" count="{{classicData.fav_nums}}"/>

 onLike: function(event) {
    console.log(event)
  }