uni-app $refs的基本用法

$refs的基本用法

一个对象(Object)，持有注册过 ref 特性 的所有 DOM 元素和组件实例。

<template>
    <view class="container" style="background: #0FAEFF;">
        <view class="child"> hi {{showModal}}</view>
    </view>
</template>
<script>
    export default {
        props: {
            showModal: {
                type: String,
                default: 'hello'
            }
        },
        data() {
            return {
                childdata: 'child value'
            };
        },
        methods: {
            sayHello() {
                console.info("--child:--" + this.showModal);
            }
        }
    }
</script>
 

child

<template>
    <view class="container">
        <child :showModal="showModal" ref="vref"></child>

           <button @tap="refMethods" type="primary" >点击</button>
    </view>
</template>

<script>
    import child from "../../components/child.vue"

    export default {
        components: {
            child
        },
        data() {
            return {
                showModal: " parent say",
                parentValue: '',
                syncDate: ' p syncDate'
            };
        },
        methods: {
            refMethods() {
                var child = this.$refs.vref;
                child.sayHello();
            }

        }
    }
</script>

<style>

</style>

parent