子组件调用子组件的方法

在App.vue父组件中使用子组件HeaderBar 和 Dialog_Login

一、头部组件HeaderBar

<template>
    <div id="HeaderBar">
        <el-row type="flex" class="row-bg" justify="space-around">
            <el-col :span="4" class="el-icon-menu">宠物店</el-col>
            <el-col :span="16" >
                <el-input v-model="input" placeholder="请输入内容"><i slot="prefix" class="el-input__icon el-icon-search"></i></el-input>
            </el-col>
            <el-col :span="4" class="login"><el-button type="success" @click="showLogin" class="loginBtn" size="mini">登录</el-button></el-col>
        </el-row>
    </div>
</template>

<script type="text/ecmascript-6">
    export default {
        name: "HeaderBar",
        data() {
            return {
                input: ''
            }
        },
        methods:{
            showLogin(){
                this.$parent.$refs.diaLog_login.showDialog_Login();
            }
        }
    };
</script>

<style lang="stylus" rel="stylesheet/stylus">
    #HeaderBar
        .el-col
            font-size:12px;
            height:40px;
            line-height:40px;
            .el-input__inner
                height:30px;
                line-height:30px;
            .loginBtn
                45px;
                padding-right:3.7px;
                padding-left:3.7px;
                font-size:12px;
</style>

二、弹框-登录组件Dialog_Login

<template>
    <div id="dialog">
        <el-dialog title="登录" :visible.sync="dialogFormVisible">
            <el-form :model="ruleForm2" status-icon :rules="rules2" ref="ruleForm2" label-width="70px" class="demo-ruleForm">
                <el-form-item label="账号" prop="account">
                    <el-input type="text" v-model="ruleForm2.account" autocomplete="off"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="pass">
                    <el-input type="password" v-model="ruleForm2.pass" autocomplete="off"></el-input>
                </el-form-item>
                <el-form-item label="确认密码" prop="checkPass">
                    <el-input type="password" v-model="ruleForm2.checkPass" autocomplete="off"></el-input>
                </el-form-item>
                <el-form-item label="年龄" prop="age">
                    <el-input v-model.number="ruleForm2.age"></el-input>
                </el-form-item>
                <el-form-item>
                    <el-button type="primary" @click="submitForm('ruleForm2')">提交</el-button>
                    <el-button @click="resetForm('ruleForm2')">重置</el-button>
                </el-form-item>
            </el-form>
        </el-dialog>
    </div>
</template>

<script type="text/ecmascript-6">
    export default {
        name: "Dialog_Login",
        data(){
            var checkAge = (rule, value, callback) => {
                if (!value) {
                    return callback(new Error('年龄不能为空'));
                }
                setTimeout(() => {
                    if (!Number.isInteger(value)) {
                        callback(new Error('请输入数字值'));
                    } else {
                        if (value < 18) {
                            callback(new Error('必须年满18岁'));
                        } else {
                            callback();
                        }
                    }
                }, 1000);
            };
            var validateAccount = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('请输入账号'));
                }
            };
            var validatePass = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('请输入密码'));
                } else {
                    if (this.ruleForm2.checkPass !== '') {
                        this.$refs.ruleForm2.validateField('checkPass');
                    }
                    callback();
                }
            };
            var validatePass2 = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('请再次输入密码'));
                } else if (value !== this.ruleForm2.pass) {
                    callback(new Error('两次输入密码不一致!'));
                } else {
                    callback();
                }
            };
            return{
                dialogFormVisible: false,
                ruleForm2: {
                    account: '',
                    pass: '',
                    checkPass: '',
                    age: ''
                },
                rules2: {
                    account: [
                        { validator: validateAccount, trigger: 'blur' }
                    ],
                    pass: [
                        { validator: validatePass, trigger: 'blur' }
                    ],
                    checkPass: [
                        { validator: validatePass2, trigger: 'blur' }
                    ],
                    age: [
                        { validator: checkAge, trigger: 'blur' }
                    ]
                }
            };
        },
        methods:{
            showDialog_Login(){
                this.dialogFormVisible= true;
            },
            submitForm(formName) {
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        alert('submit!');
                    } else {
                        console.log('error submit!!');
                        return false;
                    }
                });
            },
            resetForm(formName) {
                this.$refs[formName].resetFields();
            }
        }
    };
</script>

<style lang="stylus" rel="stylesheet/stylus">
    #dialog
        .el-dialog
             83%;
        .el-dialog__body
            padding:15px 20px
</style>

 重点在App.vue中用组件HeaderBar和Dialog_Login

 解释这段代码：

showLogin(){
    this.$parent.$refs.diaLog_login.showDialog_Login();
}

 组件HeaderBar要触发Dialog_Login组件 的事件 showDialog_Login