uniapp 组件传参

父组件

<v-sub @returnDate=returnDate :backGround=backGround></v-sub>

import vSub from "../../../components/v-sub.vue"
	export default {
		components:{
			vSub
		},
		data() {
			return {
				backGround:"#000"
			}
		},
		methods: {
			returnDate(e){
				console.log("接收到的值==>>"+e)
			}
		}
	}

<device ref="device" :stoId="storeId" v-show="active == 'device'">
		</device>
		<battery ref="battery" :stoId="storeId" v-show="active == 'battery'">
		</battery>
		
import device from './components/device.vue'
	import battery from './components/battery.vue'
	export default {
		components: {
			device,
			battery
		},
		data() {
			return {
				storeId: null, // 参数storeId
				active: 'device' // 切换tab
			}
		},

子组件

<template>
	<view class="content" :style="[{background:backGround}]">
		<button @tap="passValue">点击传值</button>
	</view>
</template>
 
<script>
	export default {
		props:{
			backGround:{
				type:String,
				default:"#fff"
			}
		},
		methods:{
			passValue(){
				this.$emit("returnDate","yoyoyo")
			}
		}
	}
</script>
 
<style>
	.content{
		 400upx;
		height: 400upx;
	}
</style>

子类接收父类的数据,就会用到props

file