在组件放使用v-model和slot插槽的简单实用

封装的组件（SelectDefault.vue文件）：

<template>
    <div class="select-default">
        <label>{{title}}</label>
        <div class="textwarm">
            <input type="text"
                   @click="showPicker"
                   v-model="inputText"
            >
            <span class="iconfont">&#xe60a;</span>
        </div>
        <!--v-model属性用来控制是vant&ndash;&gt; Popup弹出层是否显示-->
        <van-popup v-model="isShow" position="bottom" :overlay="true">
            <van-picker
                    show-toolbar
                    :title="title"
                    :columns="columns"
                    @cancel="onCancel"
                    @confirm="onConfirm"
            />
        </van-popup>
    </div>
</template>

<script>
    import { Picker,Popup } from 'vant';
    export default {
        name: "SelectDefault",
        components: {
            [Picker.name]:Picker,
            [Popup.name]:Popup
        },
        data() {
            return {
                // columns: ['杭州', '宁波', '温州', '嘉兴', '湖州'],
                isShow: false,
                //设置输入框默认值
                inputText: this.dataArr[0].name
            }
        },
        props: {
            value: {
                type: String, //属性的类型
                // required: false, //// true 必须传 false 不是必须传递的
                default: '1'// 默认值
            },
            title: {
                type: String
            },
            //选择器展示的数据
            dataArr: {
                type: Array,
                required: true
            }
        },
        //转换为选择器想要的columns数据格式
        computed: {
            columns: function () {
                let listArr = [];
                this.dataArr.forEach((item, index)=>{
                    // console.log(item, index);
                    listArr.push(item.name);
                });
                // console.log(listArr);
                return listArr;
            }
        },
        methods: {
            //显示选择器
            showPicker(){
                this.isShow = true;
            },
            //选择器确定
            onConfirm(value, index) {
                console.log(`当前值：${value}, 当前索引：${index}`);
                //隐藏选择器
                this.isShow = false;
                //改变输入框的值
                this.inputText = value;
                //传给使用此组件上的v-model
                let userID = this.dataArr[index].user_id.toString();
                this.$emit('input', userID);
            },
            //选择器取消
            onCancel() {
                console.log('取消');
                this.isShow = false;
            }
        },
        created(){
            //设置默认值
            let userID = this.dataArr[0].user_id.toString();
            this.$emit('input', userID);
        }
    }
</script>

<style scoped lang="stylus">
    .select-default
        display:flex;
        justify-content:space-around;
        align-items: center;
        padding:15px 0;
        >.textwarm
            position: relative;
            span
                position: absolute;
                top:50%;
                right:19px;
                font-size:12PX;
                color:#d8d8d8;
                transform: translateY(-50%);
        label
            150px;
            font-size:28px;
            color:rgba(26,26,26,1);
            line-height:40px;
            font-weight:400;
        input
            514px;
            padding: 24px 22px;
            font-size:30px;
            color:rgba(26,26,26,1);
            font-weight:400;
            border-radius:10px;
            border:1PX solid rgba(204,204,204,1);
            box-sizing: border-box;
        .picker
            position fixed
            left 0
            bottom 0
            width 100vw
            background-color: red
            z-index 222
</style>

在其他.vue文件中使用：

<template>
    <div class="add-admin-user">
        <p class="p-row1">
            <span>用户名</span>
            <span>{{userName}}</span>
        </p>
        <p class="p-row2">
            <inputs v-model="name"><label slot="label-name">真实姓名</label></inputs>
        </p>
        <p class="p-row3">
            <span>所属部门：</span>
            <span>
                <select v-model="department">
                      <option v-for="item, index in departmentArr" :value ="item.id">{{ item.name }}</option>
                </select>
            </span>
        </p>
        <p class="p-row4">
            <span>职位：</span>
            <span>
                <select v-model="role">
                      <option v-for="item, index in roleArr" :value ="item.id" >{{ item.role_name }}</option>
                </select>
            </span>
        </p>
        <p class="p-row5">
            <inputs v-model="mobile"><label slot="label-name">联系手机号</label></inputs>
        </p>
        <p class="p-row6">
            <inputs v-model="wechat"><label slot="label-name">微信</label></inputs>
        </p>
        <p class="p-row7">
            <inputs v-model="email"><label slot="label-name">邮箱</label></inputs>
        </p>

<<--本例演示关键代码-->>
        <p class="test">
            <SelectDefault v-model="test" title="所属部门" :data-arr="departmentArr"></SelectDefault>
        </p>

<<--本例演示关键代码END-->>

        <div class="btn-group">
            <span class="cancel-btn" @click="handleCancel">取消</span>
            <span class="confirm-btn" @click="handleConfirm">确定</span>
        </div>

    </div>
</template>

<script>
    import Api from "@/api/modules/adminUser"
    import Input from "../components/basic/Input.vue"
   
/*<<--本例演示关键代码-->>*/

    import SelectDefault from "../components/basic/SelectDefault"

/*<<--本例演示关键代码END-->>*/

    export default {
        name: "AddAdminUser",
        components:{
            inputs:Input,
            selects:Select,
            SelectDefault:SelectDefault ///*<<--本例演示关键代码-->>*/
        },
        data(){
            return{
                userName: "",
               // /*<<--本例演示关键代码-->>*/
                departmentArr: [
                        {user_id: 1, name: "老板"},
                        {user_id: 2, name: "秘书"},
                        {user_id: 3, name: "老板娘"},
                        {user_id: 4, name: "会计"},
                        {user_id: 5, name: "模特"}
                     ],
                // departmentArr: [],
   
               /*<<--本例演示关键代码END-->>*/


                roleArr: [],
                //以下用户输入信息
                name: "",
                department: "1",
                role: "1" ,
                mobile: "",
                wechat: "",
                email: "",
                test: ""
            }
        },
        watch: {
            test: function (val, oldVal) {
              console.log(val);
          }
        },
        methods: {
            //初始化页面数据
            initView(){
                Api.getUserName().then((res)=>{
                    // console.log(res);
                    this.userName = res.data.user_name;
                });
                Api.departmentListAll().then((res)=>{
                     // console.log(res);
                    this.departmentArr = res.data.list;
                });
                Api.roleListAll().then((res)=>{
                    // console.log(res);
                    this.roleArr = res.data;
                })
            },

            //确定
            handleConfirm(){
                //验证表单
                let self = this;
                if(!/^1(3|4|5|7|8)d{9}$/.test(self.mobile)){
                    console.log('手机号格式不正确');
                    return;
                }
                if(!/^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(.[a-zA-Z0-9_-]+)+$/.test(self.email)){
                    console.log('Email格式不正确');
                    return;
                }
                // 发送请求
                let param =  {
                    username: this.userName.toString(),
                    name: this.name,
                    department_id: this.department,
                    role_id: this.role,
                    contact_mobile: this.mobile,
                    wechat: this.wechat,
                    email: this.email,
                };
                console.log(param);
                Api.addAdminUser(param).then((res)=>{
                    console.log(res);
                    // alert(res.msg);
                });
            },
            // 取消
            handleCancel(){
                console.log(22);
                this.$router.go(-1);
            }

        },
        created(){
            // this.initView();
        }

    }
</script>

<style scoped lang="stylus">
    p,div
        box-sizing border-box
    .add-admin-user
        font-family:PingFangSC-Regular;
        width 100vw
        height 100vh
        position relative
        font-size 32px
        text-align center
        p
            padding 0 30px
            height 90px
            .self-input label
                text-align left
        .p-row1
            display flex
            span
                line-height 90px
            span:nth-child(1)
                font-size:28px;
                font-weight:400;
                color:rgba(26,26,26,1);
                width 181px
                text-align left
                text-indent 5px
            span:nth-child(2)
                font-size:30px;
                font-weight:400;
                color:rgba(153,153,153,1);
                flex 1
                text-align left
    select
        width 300px
    .btn-group
        position absolute
        display flex
        left 0
        bottom 0
        height 80px
        width 100%
        background-color gray
        span
            flex 1
</style>    

上面实例的效果：

再附上一个solt插槽的简单实用。v-model在组件上使用时，子组件要写的代码。通过@$emit(input,"要传给v-model的值")；给组件上的v-model