最近要实习一个泡泡弹层。看了下市场的代码，要么写的不怎么好，要么过于复杂。于是拿个轮子自己加工。200行代码撸了个弹出层组件。兼容H5和APP和小程序。

功能：

  1)只支持上下左右4个方向的弹层不支持侧边靠齐

  2)不对屏幕边界适配

  3)支持弹层外边点击自动隐藏

  4)支持3种内容模式：

    1. 弹出提示文本

    2. slot内容占位

    3. 支持菜单模式

BWT：弹层外点击自动隐藏基于unibest框架的页面模板技术，这里就不放代码了，自己想想怎么弄😏 。提示：使用事件总线模式，放出的代码也提示了部分用法。

效果，H5下：

APP下：

小程序下：

组件代码：
 

<!--自定义弹出层/菜单组件1)只支持上下左右4个方向的弹层不支持侧边靠齐2)不对屏幕边界适配3)支持弹层外边点击自动隐藏4)支持3种内容模式：1. 文本为内容2. slot内容占位3. 菜单模式@Author Jim 24/10/08-->
<template><view><view class="cc_popper" @click.stop="handleClick"><slot></slot><viewclass="cc_popper_layer border-2rpx border-solid"@click.stop="() => {}":style="[data.layerStyle,{visibility: data.isShow ? 'visible' : 'hidden',opacity: data.isShow ? 1 : 0,color: props.textColor,backgroundColor: props.bgColor,borderColor: 'var(--cc-box-border)'}]"><view class="px-20rpx py-10rpx" v-if="content.length > 0 || $slots.content"><!-- 内容模式 --><slot name="content">{{ content }}</slot></view><view v-else class="py-5rpx px-10rpx"><template v-for="(conf, index) in props.menu" :key="index"><view v-if="index > 0" class="bg-box-border opacity-70 h-2rpx w-full" /><viewclass="px-20rpx py-10rpx menu-item my-5rpx"@click="() => {conf.callback()data.isShow = false}">{{ conf.title }}</view></template></view><view:class="['w-0', 'h-0', 'z-9', 'absolute', 'popper-arrow-on-' + props.direction]":style="[data.arrowStyle]"/></view></view></view>
</template>
<script lang="ts" setup>
import { CSSProperties } from 'vue'
import * as utils from '@/utils'
let instanceconst { screenWidth } = uni.getSystemInfoSync()const pixelUnit = screenWidth / 750 // rpx->px比例基数export interface MenuConf {icon?: string // 指示图标title: string // 菜单文本callback: () => void // 点击事件
}const props = withDefaults(defineProps<{textColor?: string // 指定内部文本颜色bgColor?: stringborderColor?: stringcontent?: string // 可以指定文本content，或者指定 slot content来显示弹窗内容menu?: Array<MenuConf> // 下拉菜单模式direction?: 'top' | 'bottom' | 'left' | 'right' // 弹层位置alwaysShow: boolean}>(),{textColor: 'var(--cc-txt)',bgColor: 'var(--cc-box-fill)', // 默认弹框色borderColor: 'var(--cc-box-border)', // 默认弹框边框色content: '',menu: () => [],direction: 'top',alwaysShow: false}
)const data = reactive<{isShow: booleanlayerStyle: CSSProperties // CSS定义一层够了arrowStyle: CSSProperties
}>({isShow: false,layerStyle: {},arrowStyle: {}
})onMounted(() => {instance = getCurrentInstance()if (props.alwaysShow) {nextTick(() => handleClick())}
})onUnmounted(() => {if (!props.alwaysShow) {utils.off(utils.Global.CC_GLOBAL_CLICK, hideLayer) // 移除全局点击监听}
})const hideLayer = (event: MouseEvent) => {data.isShow = falseutils.off(utils.Global.CC_GLOBAL_CLICK, hideLayer)
}const handleClick = async () => {if (data.isShow) {if (props.alwaysShow) {return}utils.off(utils.Global.CC_GLOBAL_CLICK, hideLayer)return (data.isShow = false)}const rects: UniApp.NodeInfo[] = await utils.getRectAll('.cc_popper,.cc_popper_layer', instance)const srcRect: UniApp.NodeInfo = rects[0]const layerRect: UniApp.NodeInfo = rects[1]data.arrowStyle['border' + props.direction.charAt(0).toUpperCase() + props.direction.slice(1)] ='10rpx solid var(--cc-box-border)'switch (props.direction) {case 'top': {data.layerStyle.left = `${(srcRect.width - layerRect.width) / 2}px`data.layerStyle.bottom = `${srcRect.height + 16 * pixelUnit}px`data.arrowStyle.left = `${layerRect.width / 2 - 12 * pixelUnit}px`console.log(data.arrowStyle.left)break}case 'bottom': {data.layerStyle.left = `${(srcRect.width - layerRect.width) / 2}px`data.layerStyle.top = `${srcRect.height + 16 * pixelUnit}px`data.arrowStyle.left = `${layerRect.width / 2 - 12 * pixelUnit}px`break}case 'left': {data.layerStyle.right = `${srcRect.width + 16 * pixelUnit}px`data.layerStyle.top = `${(srcRect.height - layerRect.height) / 2}px`data.arrowStyle.top = `${layerRect.height / 2 - 12 * pixelUnit}px`break}case 'right': {data.layerStyle.left = `${srcRect.width + 16 * pixelUnit}px`data.layerStyle.top = `${(srcRect.height - layerRect.height) / 2}px`data.arrowStyle.top = `${layerRect.height / 2 - 12 * pixelUnit}px`break}}data.isShow = trueif (!props.alwaysShow) {utils.on(utils.Global.CC_GLOBAL_CLICK, hideLayer)}
}
</script>
<style lang="scss" scoped>
$arrow-size: 12rpx;
$arrow-offset: -12rpx;.cc_popper {position: relative;display: inline-block;
}.cc_popper_layer {position: absolute;display: inline-block;white-space: nowrap;border-radius: 10rpx;transition: opacity 0.3s ease-in-out;
}.popper-arrow-on-top {bottom: $arrow-offset;border-right: $arrow-size solid transparent;border-left: $arrow-size solid transparent;
}.popper-arrow-on-right {left: $arrow-offset;border-top: $arrow-size solid transparent;border-bottom: $arrow-size solid transparent;
}.popper-arrow-on-left {right: $arrow-offset;border-top: $arrow-size solid transparent;border-bottom: $arrow-size solid transparent;
}.popper-arrow-on-bottom {top: $arrow-offset;border-right: $arrow-size solid transparent;border-left: $arrow-size solid transparent;
}.menu-item {&:active {background-color: #88888840;}
}
</style>

测试页面：

<template><view class="text-txt w-full h-full"><view>消息</view><view class="x-items-between px-200rpx pt-100rpx"><cc-popper direction="left" content="说啥好呢" alwaysShow><view class="w-100rpx"><u-button text="左边" /></view></cc-popper><view class="w-100rpx"><cc-popper direction="top" content="向上看" alwaysShow><view class="w-100rpx"><u-button text="上面" /></view></cc-popper><cc-popper direction="bottom" content="下边也没有" alwaysShow><view class="w-100rpx mt-20rpx"><u-button text="下面" /></view></cc-popper></view><cc-popper direction="right" content="右边找找" alwaysShow><view class="w-100rpx"><u-button text="右边" /></view></cc-popper></view><view class="x-items-between px-150rpx pt-400rpx"><cc-popper alwaysShow><view class="w-200rpx"><u-button shape="circle" text="烎" /></view><template #content><text class="text-100rpx">🤩</text></template></cc-popper><cc-popper alwaysShow :menu="data.menu"><div class="w-100rpx h-100rpx bg-red"></div></cc-popper></view></view>
</template>
<script lang="ts" setup>
import { MenuConf } from '@/components/ccframe/cc-popper.vue'const data = reactive<{menu: Array<MenuConf>
}>({menu: [{title: '口袋1',callback: () => {console.log('糖果')}},{title: '口袋2',callback: () => {console.log('退出系统')}},{title: '口袋3',callback: () => {console.log('空的')}}]
})
</script>

对了，菜单的图标支持还没写。等用到的时候再加上去，代码放这存档，后面再更新:）