uniapp组件之间如何利用全局函数传参

uni.$on('函数名',(形参数)=>{...});

<template><view>meme {{this.num}}</view></template><script>export default{data(){return{num:12}},created(){uni.$on(&#39;update&#39;,(num)=>{this.num=num;});}}</script><style></style>

<template><view><button>按钮</button><me></me></view></template><script>import det from &#39;../detail/detail.vue&#39;import me from &#39;../me/me.vue&#39;export default{data(){return{imgArr:[&#39;a&#39;],num2:11}},components:{det,me},methods:{get(){uni.$emit(&#39;update&#39;,this.num2);}}}</script><style>@import url("../css/a.css");.box{height: 375rpx;width: 375rpx;/* #ifdef H5 */background-color: #4CD964;/* #endif *//* #ifdef APP-PLUS */background-color: #007AFF;/* #endif */}.box1{background-color: #007AFF;}</style>