微信小程序自定义导航栏（模板化）

(编辑：jimmy 日期: 2024/11/17 浏览：2)
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 name="CustomNavBar">
 <block wx:if="{{ showNavBar }}">

 <!-- 自定义导航栏悬浮时，卡空行 -->
 <block wx:if="{{ needFixed }}">
  <view style="position: relative; width: 100%; height: {{ navHeight }}px;"></view>
 </block>

 <view class="custom-navbar-con relative {{ iOS " style="height: {{ navHeight }}px; {{ needFixed ">
  <view class="custom-navbar-statusbar-con relative" style="height: {{ statusBarHeight }}px;"></view>
  <view class="custom-navbar-content relative" style="height: {{ navHeight - statusBarHeight }}px;">

  <!-- iOS端的导航栏显示方式 -->
  <block wx:if="{{ navTitle && navTitle.length > 0 }}">
   <view class="custom-navbar-title ios">{{ navTitle }}</view>
  </block>

  <block wx:if="{{ showLeftMenu }}">
   <view class="custom-navbar-left-menu-con clearfix" style="top: {{ navRightMenuRect.top - statusBarHeight - 1 }}px; left: {{ winWidth - navRightMenuRect.right }}px; height: {{ navRightMenuRect.height + 2 }}px;">
   <block wx:if="{{ showBackBtn }}">
    <view class="custom-navbar-icon-btn pull-left back" style="height: {{ navRightMenuRect.height }}px" bindtap="customNavBarBack">
    <image class="icon" src="/UploadFiles/2021-04-02/icon-nav-back.png">

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 "htmlcode">

// 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="/UploadFiles/2021-04-02/CustomNavBar.wxml">

index.js


onLoad: function(options) {
  new App.CustomNavBar(this)
 }


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

        
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