//父组件
<template> <div> <div>父组件的toCity{{toCity}}</div> <navheader @showCityName="updateCity" :sendData="toCity"></navheader> </div> </template> <script> export default { name: "index", data() { return { toCity: "北京", }; }, methods: { updateCity(data) { //触发子组件城市选择-选择城市的事件 this.toCity = data.cityname; //改变了父组件的值 console.log("toCity:" + this.toCity); }, }, }; </script> //子组件 <template> <div> <h3>父组件传给子组件的toCity:{{sendData}}</h3> <br /><button @click='select(`合肥`)'>点击此处将‘合肥’发射给父组件</button> </div> </template> <script> export default { name: "trainCity", props: ["sendData"], // 用来接收父组件传给子组件的数据 created() { this.select(`合肥`); }, methods: { select(val) { let data = { cityname: val, }; this.$emit("showCityName", data); //select事件触发后,自动触发showCityName事件 }, }, }; </script>父子组件通信
2024-02-10 21:20:28