vue,uni-app等,父组件获取子组件的值

使用环境

使用软键盘时,键盘为组件,输入框是父组件…键盘的输入值要传到父组件输入框上
(.sync加了才可以使用this.$emit)

(this.$emit(‘update:参数名’,值))

例子

test.vue

<template>
	<view>
		<view style="background: #fff;padding:20upx;margin-top:20upx" class="pay_t">
			<view class='pay_t_t'>请输入付款金额</view>
			<view style="display: flex;align-items: center;font-size: 80upx;font-weight: bold;height: 140upx;border-bottom: 1px solid #C0BFC4;" class='pay_t_m'><text style="margin-left: 20upx;">¥</text>
			{{money}}</view>
		</view>
		
		<testcount :money.sync="money"></testcount>
	</view>
</template>

<script>
	import testcount from "@/components/testcount.vue"
	export default {
		name:"test",
		components:{
			testcount
		},
		data() {
			return {
				money:'',
			};
		},
	}
</script>

<style lang="less">
	.pay_t{
		view{
			padding:10upx;
		}
	}
</style>

testcount.vue(软键盘组件,自己封装,可以改动)

<template>
	<div>
		<button @click="add"> add</button>
	</div>
</template>
<script>
	export default{
		name:"testcount",
		data(){
			return {
				money:'',
			}
		},
		methods:{
			add(){
				this.money+=1;
				}
	},
		watch:{
			money(val){
				console.log("改变",val);
				this.$emit('update:money',val);   //主要
				
			}
		},
	}
</script>

<style>
</style>