前段时间写过一篇关于微信小程序自定义导航栏的自定义组件，但是对于分享页有一定的bug
这次用模板化又搞了一遍 优化了下Android与IOS 显示更接近微信原生的导航栏，以及修复分享页面不显示返回首页按钮
如果大家不习惯模板化的话可以 针对自己的需求拿以前封装的组件化做一些修改
微信小程序自定义导航栏(组件化)
CustomNavBar.wxml
<template> <block wx:if="{{ showNavBar }}"> <!-- 自定义导航栏悬浮时，卡空行 --> <block wx:if="{{ needFixed }}"> <view></view> </block> <view> <view></view> <view> <!-- iOS端的导航栏显示方式 --> <block wx:if="{{ navTitle && navTitle.length > 0 }}"> <view>{{ navTitle }}</view> </block> <block wx:if="{{ showLeftMenu }}"> <view> <block wx:if="{{ showBackBtn }}"> <view bindtap="customNavBarBack"> <image src="" mode="aspectFit" /> <text></text> </view> </block> <block wx:if="{{ showHomeBtn }}"> <view bindtap="customNavBarBackToHome"> <image src="" mode="aspectFit" /> <text></text> </view> </block> <!-- android端的导航栏显示方式 --> <block wx:if="{{ navTitle && navTitle.length > 0 }}"> <view>{{ navTitle }}</view> </block> </view> </block> </view> </view> </block> </template>
CustomNavBar.wxss
.custom-navbar-con { position: relative; width: 100%; background-color: white; z-index: 9999; } .custom-navbar-con .custom-navbar-statusbar-con { width: 100%; } .custom-navbar-con .custom-navbar-content { width: 100%; } .custom-navbar-con .custom-navbar-left-menu-con { position: absolute; } .custom-navbar-con .custom-navbar-left-menu-con .custom-navbar-icon-btn { height: 100%; border-radius: 200px; border: 1px solid rgba(220, 220, 220, 0.6); } .custom-navbar-con .custom-navbar-left-menu-con .custom-navbar-icon-btn .icon { height: 90%; margin-top: 2.5%; } .custom-navbar-con .custom-navbar-left-menu-con .custom-navbar-icon-btn .text { font-size: 27rpx; } .custom-navbar-con .custom-navbar-left-menu-con .custom-navbar-icon-btn.back { border: none; } .custom-navbar-con .custom-navbar-left-menu-con .custom-navbar-icon-btn.back~.custom-navbar-icon-btn.home { margin-left: 10rpx; } .custom-navbar-con .custom-navbar-left-menu-con .custom-navbar-icon-btn.switch-shop { padding-left: 5px; padding-right: 25rpx; } .custom-navbar-con.ios .custom-navbar-title.android { display: none; } .custom-navbar-con.android .custom-navbar-title.ios { display: none; } .custom-navbar-con .custom-navbar-title.ios { font-weight: bold; text-align: center; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); -webkit-transform: translate(-50%, -50%); } .custom-navbar-con .custom-navbar-title.android { padding-left: 30rpx; }```
CustomNavBar.js
```javascript module.exports = function(PageInstance) { let App = getApp() let _tplData = { _CustomNavBar_: { navRightMenuRect: App.NavRightMenuRect, navRightMenuCenterY: App.NavRightMenuCenterY, statusBarHeight: App.StatusBarHeight, winWidth: App.WinWidth, winHeight: App.WinHeight, iOS: App.iOS, navTitle: '', // 当前只合适短标题，如需长标题，建议隐藏自定义导航栏，自定义展示 navHeight: App.CustomNavHeight, needFixed: false, showNavBar: !App.NavRightMenuRect ? false : true, showLeftMenu: true, showBackBtn: true, showHomeBtn: false } } let _tplMethods = { customNavBarBack() { wx.navigateBack() }, customNavBarBackToHome() { let url = '/pages/index/index' wx.reLaunch({ url: url }) } } let isIndexPage = !!(PageInstance.route == 'pages/index/index') let pages = getCurrentPages() if (pages.length == 1) { _tplData._CustomNavBar_.showBackBtn = false _tplData._CustomNavBar_.showHomeBtn = !isIndexPage } // 每个页面 可单独配置自定义导航栏 if (PageInstance.data.CustomNavBarConfig) { Object.assign(_tplData._CustomNavBar_, PageInstance.data.CustomNavBarConfig) } // !!!! 最后执行 // 当无法获取到右上角按钮胶囊的布局位置时，强制设置自定义导航栏为隐藏状态 if (!App.NavRightMenuRect) { _tplData._CustomNavBar_.showNavBar = false } Object.assign(PageInstance, _tplMethods) PageInstance.setData(_tplData) return this }
app.js的配置
// 自定义导航栏 import CustomNavBar from './template/CustomNavBar/CustomNavBar'; App({ //自定义 模板式 组件 CustomNavBar, // 系统信息 WinWidth: 0, WinHeight: 0, StatusBarHeight: 0, PixelRatio: 1, SystemFullName: '', SystemVersion: '', SystemSDKVersion: '', //自定义导航栏相关 NavRightMenuRect: null, NavRightMenuCenterY: 0, CustomNavHeight: 0, onLaunch: function (options) { let self = this let systemInfo = wx.getSystemInfoSync() self.iOS = systemInfo.platform === 'ios' self.isDebug = systemInfo.platform === 'devtools' if (self.isDebug) { // 单纯为了在开发工具下调试 自定义导航栏 // 开发工具下不存在App版本号的区分 systemInfo.version = '7.0.0' } self.WinWidth = systemInfo.windowWidth self.WinHeight = systemInfo.windowHeight self.StatusBarHeight = systemInfo.statusBarHeight // 部分小程序库版本没有返回状态栏高度 if (!self.StatusBarHeight) { self.StatusBarHeight = 20 } self.PixelRatio = Math.max(systemInfo.pixelRatio, 2) self.SystemFullName = systemInfo.system self.SystemVersion = systemInfo.version self.SystemSDKVersion = systemInfo.SDKVersion // app.json全局配置的自定义导航栏的话，客户端需求版本为6.6.0 // 每个页面 单独配置的自定义导航栏的话，客户端需求版本为7.0.0 // wx.getMenuButtonBoundingClientRect方法，要求基础库版本为2.1.0 if (self.compareVersion(self.SystemVersion, '6.6.0') >= 0) { // 官方的6.6.0版本以上客户端，最低基础库版本为1.9.4 // 6.6.0以上且[1.9.4 - 2.1.0]范围内的机型无法使用wx.getMenuButtonBoundingClientRect // 所以手动写死非全面屏手机的适配胶囊布局位置 self.NavRightMenuRect = { top: 26, bottom: 58, right: self.WinWidth - 10, width: 87, height: 32 } // 如果系统信息返回的状态栏高度大于20，认为是全面屏手机 if (self.StatusBarHeight > 20) { self.NavRightMenuRect.top = 50 self.NavRightMenuRect.bottom = 82 } // 2019年08月21日22:09:22 // 微信小程序库出现bug，导致部分机型wx.getMenuButtonBoundingClientRect无返回值 // 所以在这之前先默认写死一个NavRightMenuRect，防止全局的自定义导航栏已经隐藏了但是无法显示自定义导航栏 // 详见https://developers.weixin.qq.com/community/develop/doc/00062238d78e880aedd88b72351c00 if (wx.getMenuButtonBoundingClientRect) { let NavRightMenuRect = wx.getMenuButtonBoundingClientRect() self.NavRightMenuRect = { top: NavRightMenuRect.top, bottom: NavRightMenuRect.bottom, right: NavRightMenuRect.right, width: NavRightMenuRect.width, height: NavRightMenuRect.height } } self.NavRightMenuCenterY = self.NavRightMenuRect.top + self.NavRightMenuRect.height / 2 self.CustomNavHeight = self.NavRightMenuRect.bottom + (self.NavRightMenuRect.top - self.StatusBarHeight) } else { self.NavRightMenuRect = null self.CustomNavHeight = 0 } }, // 比较两个版本号 compareVersion (v1, v2) => { v1 = v1.split('.') v2 = v2.split('.') const len = Math.max(v1.length, v2.length) while (v1.length < len) { v1.push('0') } while (v2.length < len) { v2.push('0') } for (let i = 0; i < len; i++) { const num1 = parseInt(v1[i]) const num2 = parseInt(v2[i]) if (num1 > num2) { return 1 } else if (num1 < num2) { return -1 } } return 0 } }),
假如在index 页面引用
index.wxml
<!-- 自定义NavBar --> <import src="" /> <template is="CustomNavBar" data="{{ ..._CustomNavBar_ }}"></template>
index.js
onLoad: function(options) { new App.CustomNavBar(this) }