封装原因

项目中有时候需要使用自定义的头部导航栏，原生的无法满足需求

参数

属性名	描述	示例
title	标题	字符串：'首页'
bgColor	背景色	字符串：'#fff'
type	左侧的操作内容	字符串：'all'，详细值请在下方查看

参数解释

type

• all 有返回和回到首页
• back 只有返回
• home 只有回到首页
• none 什么都没有

注意点

• 组件有一个默认插槽，如果有特殊要求的导航栏可以使用插件进行自定义
• title和type都是默认插槽中内容的值，所以如果你使用了插槽来自定义头部导航栏的话title和type会失效

代码

<template><viewclass="navbar-box":style="{ 'background-color': props.bgColor }"v-if="statusBarHeight && navBarHeight"><!-- 状态栏 --><view :style="{ height: statusBarHeight + 'px' }"></view><!-- 导航栏 --><view :style="{ height: navBarHeight + 'px' }"><slot><div class="navbar-default"><div class="default-left" v-if="props.type != 'none'"><view class="default-all" v-if="props.type == 'all'"><u-icon name="arrow-left" color="#fff" size="20" @click="goBack"></u-icon><view class="default-line"></view><u-icon name="home" color="#fff" size="20" @click="goHome"></u-icon></view><view class="default-back" v-if="props.type == 'back'"><u-icon name="arrow-left" color="#fff" size="20" @click="goBack"></u-icon></view><view class="default-home" v-if="props.type == 'home'"><u-icon name="home-fill" color="#fff" size="20" @click="goHome"></u-icon></view></div><view class="default-title">{{ props.title }}</view></div></slot></view></view><!-- 占位 --><view :style="{ height: statusBarHeight + navBarHeight + 'px' }"></view>
</template>
<script setup>import { ref, onMounted, computed, watchEffect } from 'vue';import { onLoad } from '@dcloudio/uni-app';const props = defineProps({title: {type: String,default: '',},bgColor: {type: String,default: '#fff',},type: {type: String,default: 'all',},});onMounted(() => {geStatusBarHeight();getNavBarHeight();});let statusBarHeight = ref(0);let navBarHeight = ref(0);// 获取状态栏高度function geStatusBarHeight() {statusBarHeight.value = uni.getSystemInfoSync()['statusBarHeight'];}// 获取导航栏高度function getNavBarHeight() {// #ifdef MP-WEIXINlet menuButtonInfo = uni.getMenuButtonBoundingClientRect(); // 胶囊信息// 导航栏高度 = 胶囊高度 + 上间距 + 下间距 + 微调navBarHeight.value =menuButtonInfo.height +(menuButtonInfo.top - uni.getSystemInfoSync()['statusBarHeight']) * 2 +2;// #endif// #ifdef APP-PLUS || H5navBarHeight.value = 44;// #endif}// 返回上一页function goBack() {const pages = getCurrentPages();if (pages.length == 1) {uni.reLaunch({url: '/pages/home/index',});return;}uni.navigateBack();}// 去首页function goHome() {uni.reLaunch({url: '/pages/home/index',});}
</script><style lang="scss" scoped>.navbar-box {position: fixed;top: 0;left: 0;width: 100%;z-index: 2000;.navbar-default {height: 100%;display: flex;justify-content: center;align-items: center;position: relative;.default-left {position: absolute;top: 50%;left: 24rpx;transform: translateY(-50%);.default-all {display: flex;justify-content: center;align-items: center;padding: 10rpx 30rpx;background: rgba(0, 0, 0, 0.5);border-radius: 32rpx;.default-line {width: 2rpx;height: 40rpx;background: #afafaf;margin: 0 20rpx;}}.default-back,.default-home {width: 63rpx;height: 63rpx;background: rgba(0, 0, 0, 0.5);border-radius: 50%;display: flex;justify-content: center;align-items: center;}}.default-title {color: #000;font-weight: bold;font-size: 16px;}}}
</style>