在最近的项目中,使用了bootstrap-vue来开发,然而在实际的开发过程中却发现这个UI提供的组件并不能打到我们预期的效果,像alert、modal等组件每个页面引入就得重复引入,并不像element那样可以通过this.$xxx来调用,那么问题来了,如何通过this.$xxx来调用起我们定义的组件或对我们所使用的UI框架的组件呢。
以bootstrap-vue中的Alert组件为例,分一下几步进行:
1、定义一个vue文件实现对原组件的再次封装
main.vue
<template> <b-alert class="alert-wrap pt-4 pb-4" :show="isAutoClose" :variant="type" dismissible :fade="true" @dismiss-count-down="countDownChanged" @dismissed="dismiss" > {{msg}} </b-alert> </template> <script> export default { /** * 参考: https://bootstrap-vue.js.org/docs/components/alert * @param {string|number} msg 弹框内容 * @param {tstring} type 弹出框类型 对应bootstrap-vue中variant 可选值有:'primary'、'secondary'、'success'、'danger'、'warning'、'info'、'light'、'dark'默认值为 'info' * @param {boolean} autoClose 是否自动关闭弹出框 * @param {number} duration 弹出框存在时间(单位:秒) * @param {function} closed 弹出框关闭,手动及自动关闭都会触发 */ props: { msg: { type: [String, Number], default: '' }, type: { type: String, default: 'info' }, autoClose: { type: Boolean, default: true }, duration: { type: Number, default: 3 }, closed: { type: Function, default: null } }, methods: { dismiss () { this.duration = 0 }, countDownChanged (duration) { this.duration = duration } }, computed: { isAutoClose () { if (this.autoClose) { return this.duration } else { return true } } }, watch: { duration () { if (this.duration === 0) { if (this.closed) this.closed() } } } } </script> <style scoped> .alert-wrap { position: fixed; width: 600px; top: 80px; left: 50%; margin-left: -200px; z-index: 2000; font-size: 1.5rem; } </style>
这里主要就是对组件参数、回调事件的一些处理,与其他处理组件的情况没有什么区别
2、定义一个js文件挂载到Vue上,并和我们定义的组件进行交互
index.js
import Alert from './main.vue' import Vue from 'vue' let AlertConstructor = Vue.extend(Alert) let instance let seed = 1 let index = 2000 const install = () => { Object.defineProperty(Vue.prototype, '$alert', { get () { let id = 'message_' + seed++ const alertMsg = options => { instance = new AlertConstructor({ propsData: options }) index++ instance.id = id instance.vm = instance.$mount() document.body.appendChild(instance.vm.$el) instance.vm.$el.style.zIndex = index return instance.vm } return alertMsg } }) } export default install
其主要思想是通过调用这个方法给组件传值,然后append到body下
3、最后需要在main.js中use一下
import Alert from '@/components/alert/index' Vue.use(Alert)
4、使用
this.$alert({msg: '欢迎━(*`∀´*)ノ亻!'})
5、confrim的封装也是一样的
main.vue
<template> <b-modal v-if="!destroy" v-model="isShow" title="温馨提示" @change="modalChange" @show="modalShow" @shown="modalShown" @hide="modalHide" @hidden="modalHidden" @ok="modalOk" @cancel="modalCancel" :centered="true" :hide-header-close="hideHeaderClose" :no-close-on-backdrop="noCloseOnBackdrop" :no-close-on-esc="noCloseOnEsc" :cancel-title="cancelTitle" :ok-title="okTitle"> <p class="my-4">{{msg}}</p> </b-modal> </template> <script> export default { /** * 参考: https://bootstrap-vue.js.org/docs/components/modal * @param {boolean} isShow 是否显示modal框 * @param {string|number} msg 展示内容 * @param {boolean} hideHeaderClose 是否展示右上角关闭按钮 默认展示 * @param {string} cancelTitle 取消按钮文字 * @param {string} okTitle 确定按钮文字 * @param {boolean} noCloseOnBackdrop 能否通过点击外部区域关闭弹框 * @param {boolean} noCloseOnEsc 能否通过键盘Esc按键关闭弹框 * @param {function} change 事件触发顺序: show -> change -> shown -> cancel | ok -> hide -> change -> hidden * @param {function} show before modal is shown * @param {function} shown modal is shown * @param {function} hide before modal has hidden * @param {function} hidden after modal is hidden * @param {function} ok 点击'确定'按钮 * @param {function} cancel 点击'取消'按钮 * @param {Boolean} destroy 组件是否销毁 在官方并没有找到手动销毁组件的方法,只能通过v-if来实现 */ props: { isShow: { type: Boolean, default: true }, msg: { type: [String, Number], default: '' }, hideHeaderClose: { type: Boolean, default: false }, cancelTitle: { type: String, default: '取消' }, okTitle: { type: String, default: '确定' }, noCloseOnBackdrop: { type: Boolean, default: true }, noCloseOnEsc: { type: Boolean, default: true }, change: { type: Function, default: null }, show: { type: Function, default: null }, shown: { type: Function, default: null }, hide: { type: Function, default: null }, hidden: { type: Function, default: null }, ok: { type: Function, default: null }, cancel: { type: Function, default: null }, destroy: { type: Boolean, default: false } }, methods: { modalChange () { if (this.change) this.change() }, modalShow () { if (this.show) this.show() }, modalShown () { if (this.shown) this.shown() }, modalHide () { if (this.hide) this.hide() }, modalHidden () { if (this.hidden) this.hidden() this.destroy = true }, modalOk () { if (this.ok) this.ok() }, modalCancel () { if (this.cancel) this.cancel() } } } </script>
index.js
import Confirm from './main.vue' import Vue from 'vue' let ConfirmConstructor = Vue.extend(Confirm) let instance let seed = 1 let index = 1000 const install = () => { Object.defineProperty(Vue.prototype, '$confirm', { get () { let id = 'message_' + seed++ const confirmMsg = options => { instance = new ConfirmConstructor({ propsData: options }) index++ instance.id = id instance.vm = instance.$mount() document.body.appendChild(instance.vm.$el) instance.vm.$el.style.zIndex = index return instance.vm } return confirmMsg } }) } export default install