uniapp父组件与子组件之间的传值

父组件传子组件：父组件定义值，子组件通过props获取，然后渲染

子组件传父组件：子组件中用$emit方法，父组件用获取

子组件：

<template>
	<view>
		
		
		<button type="primary" @click="sendNum">{
   
   {title}}这是test组件,</button>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				num: 1688
			}
		},
		methods: {
			sendNum() {
				this.$emit('myEvent', this.num)
			}
		},
		props:['title'],
		beforeCreate() {
			console.log('实例已经开始初始化了')
		},
		created() {
			console.log('实例初始化完成')
		},
		beforeMount() {
			console.log('before mount')
		},
		mounted() {
			console.log('mounted')
		},
		onReady() {
			console.log('页面初次渲染完成了')
		},
		destroyed() {
			console.log('页面销毁了')
		}
	}
</script>

<style>
</style>

父组件

<template>
	<view class="content">
		<test :title="title" @myEvent="getNum"></test>
	</view>
</template>
<script>
	import test from  '../../components/test.vue'
	export default {
		data() {
			return {
				title: '传给子组件'
			}
		},
		methods: {
			getNum(num) {
				console.log(num)
			}
		},
		components: {
			test
		}
	}
</script>

<style>
	.content {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
	}
</style>