微信小程序自定义导航栏（模板化）

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

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 ? ' ios ' : ' android ' }}" style="height: {{ navHeight }}px; {{ needFixed ? 'position: fixed; top: 0;' : '' }}">
 <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="../../image/icon-nav-back.png" mode="aspectFit" style="width: {{ navRightMenuRect.height }}px;" />
 <text class="text"></text>
 </view>
 </block>

 <block wx:if="{{ showHomeBtn }}">
 <view class="custom-navbar-icon-btn pull-left home" style="height: {{ navRightMenuRect.height }}px" bindtap="customNavBarBackToHome">
 <image class="icon" src="../../image/icon-nav-home.png" mode="aspectFit" style="width: {{ navRightMenuRect.height }}px;" />
 <text class="text"></text>
 </view>
 </block>

 <!-- android端的导航栏显示方式 -->
 <block wx:if="{{ navTitle && navTitle.length > 0 }}">
 <view class="custom-navbar-title android pull-left" style="line-height: {{ navRightMenuRect.height - 2 }}px;">{{ 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/CustomNavBar/CustomNavBar.wxml" />
<template is="CustomNavBar" data="{{ ..._CustomNavBar_ }}"></template>

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脚本之家。