【uni-app】自定义导航栏

新手刚玩uniapp进行微信小程序，甚至多端的开发。原生uniapp的导航栏，并不能满足ui的需求，所以各种查阅资料，导航栏自定义内容整理如下：

需要修改的文件如下：

在这里插入图片描述

1、pages.json

修改pages.json，启动导航栏自适应，设置"navigationStyle": "custom"

{"pages": [{"path": "pages/v2/AIChat/AIChat","style": {"navigationBarTitleText": "AI","navigationStyle": "custom"    }}],"globalStyle": {"navigationBarTextStyle": "black","navigationBarBackgroundColor": "#F8F8F8","backgroundColor": "#F8F8F8","app-plus": {"background": "#efeff4"}}
}

2、system_info.js

新建system_info.js，用于获取当前设备的机型系统信息。

/*** 此js文件管理关于当前设备的机型系统信息*/
const systemInfo = function() {/****************** 所有平台共有的系统信息 ********************/// 设备系统信息let systemInfomations = uni.getSystemInfoSync()// 机型适配比例系数let scaleFactor = 750 / systemInfomations.windowWidth// 当前机型-屏幕高度let windowHeight = systemInfomations.windowHeight * scaleFactor //rpx// 当前机型-屏幕宽度let windowWidth = systemInfomations.windowWidth * scaleFactor //rpx// 状态栏高度let statusBarHeight = (systemInfomations.statusBarHeight) * scaleFactor //rpx// 导航栏高度  注意：此导航栏高度只针对微信小程序有效 其他平台如自定义导航栏请使用：状态栏高度+自定义文本高度let navHeight = 0 //rpx// console.log(windowHeight,'哈哈哈哈哈');/****************** 微信小程序头部胶囊信息 ********************/// #ifdef MP-WEIXINconst menuButtonInfo = wx.getMenuButtonBoundingClientRect()// 胶囊高度let menuButtonHeight = menuButtonInfo.height * scaleFactor //rpx// 胶囊宽度let menuButtonWidth = menuButtonInfo.width * scaleFactor //rpx// 胶囊上边界的坐标let menuButtonTop = menuButtonInfo.top * scaleFactor //rpx// 胶囊右边界的坐标let menuButtonRight = menuButtonInfo.right * scaleFactor //rpx// 胶囊下边界的坐标let menuButtonBottom = menuButtonInfo.bottom * scaleFactor //rpx// 胶囊左边界的坐标let menuButtonLeft = menuButtonInfo.left * scaleFactor //rpx// 微信小程序中导航栏高度 = 胶囊高度 + (顶部距离 - 状态栏高度) * 2navHeight = menuButtonHeight + (menuButtonTop - statusBarHeight) * 2// #endif// #ifdef MP-WEIXINreturn {scaleFactor,windowHeight,windowWidth,statusBarHeight,menuButtonHeight,menuButtonWidth,menuButtonTop,menuButtonRight,menuButtonBottom,menuButtonLeft,navHeight}// #endif// #ifndef MP-WEIXINreturn {scaleFactor,windowHeight,windowWidth,statusBarHeight}// #endif
}export {systemInfo
}

3、HeadNav.vue

新建组件HeadNav.vue，这是自定义导航栏。

/*
* 注意：
* 1、在传入宽度或者高度时，如果是Number数据，传入的值为px大小,无需带单位，组件自动计算
* 2、在使用此导航栏时，建议传入UI规定的导航栏高度，此高度只针对除微信小程序的其他平台有效，微信小程序的导航栏高度，组件自计算
*/
<template><view :style="{height:navHeight+'rpx'}"><!-- 微信小程序头部导航栏 --><!-- #ifdef MP-WEIXIN --><view class="wx-head-mod" :style="{height:navHeight+'rpx',backgroundColor:navBackgroundColor}"><view class="wx-head-mod-nav" :style="{height:navigationBarHeight+'rpx',top:statusBarHeight+'rpx'}"><view class="wx-head-mod-nav-content":style="{height:customHeight+'rpx',justifyContent:textAlign === 'center'?'center':'left'}"><!-- 文本区 --><view class="wx-head-mod-nav-content-mian":style="{width:navTextWidth,lineHeight:customHeight + 'rpx',paddingLeft:textPaddingLeft*scaleFactor+'rpx',fontSize:fontSize*scaleFactor+'rpx',fontWeight:fontWeight,color:titleColor}">{{textContent}}</view><!-- 返回按钮 --><view class="wx-head-mod-nav-content-back" :style="{display:isBackShow?'flex':'none'}"@click="backEvent"><view class="wx-head-mod-nav-content-back-img":style="{width:backImageWidth*scaleFactor+'rpx',height:backImageHeight*scaleFactor+'rpx'}"><image :src="backImageUrl" mode="" style="width: 100%;height: 100%;"></image></view></view></view></view></view><!-- #endif --><!-- 除微信小程序之外的其他设备 --><!-- #ifndef MP-WEIXIN --><view class="other-head-mod":style="{height:navHeightValue*scaleFactor+statusBarHeight+'rpx',backgroundColor:navBackgroundColor}"><view class="other-head-mod-mian":style="{height:navHeightValue*scaleFactor+'rpx',justifyContent:textAlign === 'center'?'center':'left'}"><!-- 返回按钮 --><view class="other-head-mod-mian-back" v-show="isBackShow" @click="backEvent"><view class="other-head-mod-mian-back-img":style="{width:backImageWidth*scaleFactor+'rpx',height:backImageHeight*scaleFactor+'rpx'}"><image :src="backImageUrl" mode="" style="width: 100%;height: 100%;"></image></view></view><!-- 标题 --><view class="other-head-mod-mian-title" :style="{width:windowWidth - 184+'rpx',lineHeight:navHeightValue*scaleFactor+'rpx',paddingLeft:textPaddingLeft*scaleFactor+'rpx',fontSize:fontSize*scaleFactor+'rpx',fontWeight:fontWeight,color:titleColor}">{{textContent}}</view></view></view><!-- #endif --></view>
</template><script>const app = getApp()import {systemInfo} from '@/pages/v2/acommon_js/system_info.js'export default {name: "HeadView",props: {// 文本区域位置 left：左  center：中  textAlign: {type: String,default: 'center'},// 文本区内容textContent: {type: String,default: '哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈就啊哈哈好借好还'},// 文本区离左边的距离textPaddingLeft: {type: Number,default: 16},// 是否需要返回按钮isBackShow: {type: Boolean,default: true},// 文本区字体大小fontSize: {type: Number,default: 20 //px},// 文本区字体粗细fontWeight: {type: Number,default: 700},// 文本区返回按钮图片宽backImageWidth: {type: Number,default: 12 //px},// 文本区返回按钮图片高backImageHeight: {type: Number,default: 24 //px},// 返回按钮图标路径backImageUrl: {type: String,default: '/static/v2/aichat/ai_robot.png'},// 导航栏整体背景颜色navBackgroundColor: {type: String,default: '#2476F9'},// 标题字体颜色titleColor: {type: String,default: '#ffffff',},/******** h5端，app端需要传入自定义导航栏高度 *******/navHeightValue: {type: Number,default: 44 //px}},computed: {// 文本区宽度navTextWidth() {if (this.textAlign === 'center') {return (this.windowWidth - (this.windowWidth - this.menubarLeft) * 2) + 'rpx'} else {return this.menubarLeft + 'rpx'}},// 文本区paddingLefttextPaddingleft() {if (this.textAlign === 'center') {return '0'} else {return this.textPaddingLeft + 'rpx'}}},data() {return {statusBarHeight: app.globalData.statusBarHeight, //状态栏高度navHeight: app.globalData.navHeight, //头部导航栏总体高度navigationBarHeight: app.globalData.navigationBarHeight, //导航栏高度customHeight: app.globalData.customHeight, //胶囊高度scaleFactor: app.globalData.scaleFactor, //比例系数menubarLeft: app.globalData.menubarLeft, //胶囊定位的左边leftwindowWidth: app.globalData.windowWidth * app.globalData.scaleFactor};},methods: {backEvent() {uni.navigateBack({delta: 1})}},created() {/* 获取设备信息 */const SystemInfomations = systemInfo()/* 通用平台 */this.statusBarHeight = SystemInfomations.statusBarHeight //状态栏高度this.scaleFactor = SystemInfomations.scaleFactor //比例系数this.windowWidth = SystemInfomations.windowWidth //当前设备的屏幕宽度/* 微信小程序平台 */// #ifdef MP-WEIXINthis.navHeight = SystemInfomations.navHeight + SystemInfomations.statusBarHeight //头部导航栏总高度this.navigationBarHeight = SystemInfomations.navHeight //头部导航栏高度this.customHeight = SystemInfomations.menuButtonHeight //胶囊高度this.menubarLeft = SystemInfomations.menuButtonLeft //胶囊左边界距离左上角的距离// #endifconsole.log("this.navHeight:", this.navHeight)}}
</script><style>/* #ifdef MP-WEIXIN */.wx-head-mod {box-sizing: border-box;width: 100%;position: fixed;top: 0;left: 0;}.wx-head-mod-nav {box-sizing: border-box;width: 100%;position: absolute;left: 0;display: flex;justify-content: center;align-items: center;}.wx-head-mod-nav-content {box-sizing: border-box;width: 100%;display: flex;justify-content: left;align-items: center;position: relative;}/* 文本区 */.wx-head-mod-nav-content-mian {box-sizing: border-box;height: 100%;white-space: nowrap;text-overflow: ellipsis;overflow: hidden;}/* 返回按钮 */.wx-head-mod-nav-content-back {box-sizing: border-box;width: 60rpx;height: 100%;/* background-color: aqua; */position: absolute;top: 0;left: 32rpx;display: flex;align-items: center;justify-content: left;}.wx-head-mod-nav-content-back-img {box-sizing: border-box;}/* #endif *//* #ifndef MP-WEIXIN */.other-head-mod {box-sizing: border-box;width: 100%;position: fixed;top: 0;left: 0;}.other-head-mod-mian {box-sizing: border-box;width: 100%;display: flex;align-items: center;justify-content: left;position: absolute;left: 0;bottom: 0;}/* 返回按钮 */.other-head-mod-mian-back {box-sizing: border-box;height: 100%;width: 60rpx;position: absolute;left: 32rpx;top: 0;display: flex;align-items: center;}/* 标题 */.other-head-mod-mian-title {box-sizing: border-box;height: 100%;white-space: nowrap;text-overflow: ellipsis;overflow: hidden;}/* #endif */
</style>

4、AIChat.vue

修改要自定义导航栏的组件

<template><view style="height: 100%;"><head-nav :style="navStyle"></head-nav><view class="container" :style="containerStyle"><scroll-view :scroll-top="scrollTop" class="chat-container" :scroll-into-view="scrollintoid" scroll-y="true"@scroll="handleScroll" @scrolltolower="handleScrollToLower">省略中间布局内容</scroll-view></view></view>
</template><script>import HeadNav from '@/pages/v2/components/HeadNav.vue'import {systemInfo} from '@/pages/v2/acommon_js/system_info.js'export default {components: {MarkdownViewer,HeadNav},data() {return {// 省略部分变量containerStyle: "",navStyle: ""};},onReady() {// -------------------------- 经典界面自定义，需要记录-------------------------------------------------------------// 设备系统信息let systemInfomations_ = uni.getSystemInfoSync()// 机型适配比例系数let scaleFactor_ = 750 / systemInfomations_.windowWidth// 当前机型-屏幕高度let windowHeight_ = systemInfomations_.windowHeight * scaleFactor_ //rpx/* 获取设备信息 */const SystemInfomations = systemInfo()/* 通用平台 */const statusBarHeight = SystemInfomations.statusBarHeight //状态栏高度const scaleFactor = SystemInfomations.scaleFactor //比例系数const windowWidth = SystemInfomations.windowWidth //当前设备的屏幕宽度/* 微信小程序平台 */// #ifdef MP-WEIXINconst navHeight = SystemInfomations.navHeight + SystemInfomations.statusBarHeight //头部导航栏总高度const navigationBarHeight = SystemInfomations.navHeight //头部导航栏高度const customHeight = SystemInfomations.menuButtonHeight //胶囊高度const menubarLeft = SystemInfomations.menuButtonLeft //胶囊左边界距离左上角的距离this.containerStyle = ' height:' + (systemInfomations_.windowHeight - statusBarHeight - 10) + 'px;';// #endifconsole.log("this.viewHight:", this.viewHeight)/* 通用平台 */// #ifndef MP-WEIXINthis.containerStyle = 'height:' + (systemInfomations_.windowHeight - 54) + 'px;';this.navStyle = 'height:' + 44 + 'px';// #endif// ---------------------------------------------------------------------------------------}
}
</script>