父子组件之间的数据交互遵循：
props down - 子组件通过props接受父组件的数据
events up - 父组件监听子组件$emit的事件来操作数据
示例
子组件的点击事件函数中$emit自定义事件
export default { name: 'comment', props: ['issue','index'], data () { return { comment: '', } }, components: {}, methods: { removeComment: function(index,cindex) { this.$emit('removeComment', {index:index, cindex:cindex}); }, saveComment: function(index) { this.$emit('saveComment', {index: index, comment: this.comment}); this.comment=""; } }, //hook created: function () { //get init data } }
父组件监听事件
复制代码 代码如下:
<comment v-show="issue.show_comments" :issue="issue" :index="index" @removeComment="removeComment" @saveComment="saveComment"></comment>
父组件的methods中定义了事件处理程序
removeComment: function(data) { var index = data.index, cindex = data.cindex; var issue = this.issue_list[index]; var comment = issue.comments[cindex]; axios.get('comment/delete/cid/'+comment.cid) .then(function (resp) { issue.comments.splice(cindex,1); }); }, saveComment: function(data) { var index = data.index; var comment = data.comment; var that = this; var issue =that.issue_list[index]; var data = { iid: issue.issue_id, content: comment }; axios.post('comment/save/',data) .then(function (resp) { issue.comments=issue.comments||[]; issue.comments.push({ cid: resp.data, content: comment }); }); //clear comment input this.comment=""; } },
注意参数的传递是一个对象
其实还有更多的场景需要组件间通信
官方推荐的通信方式
首选使用Vuex
使用事件总线:eventBus,允许组件自由交流