今天小编给大家分享一下微信小程序怎么根据不同用户切换不同TabBar的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
现有需求：
小程序用户有三种身份（公众、运维人员、领导），根据不同用户身份显示不同的tabbar
众所周知微信小程序全局文件app.json里面的"tabBar"里面的list只能放置2-5个，要想实现3个tabbar,必须得复用tabbar,三种身份都需要个人中心，剩下的是长列表（两个），表单，图表 刚好是5个，废话少说，上代码
1全局.app.json
tabbar里面的sustom要设置为true
"custom": true,{ "pages": [ xxxxxx:xxxxxx ], "window": { xxxxxxxxx }, "tabBar": { "custom": true, "color": "#7A7E83", "selectedColor": "#d81e06", "borderStyle": "black", "backgroundColor": "#ffffff", "list": [ { "pagePath": "pages/Users/myrepaire/myrepaire", "text": "我要报修", "iconPath": "/images/tabbar/weixiu1.png", "selectedIconPath": "/images/tabbar/weixiu2.png" }, { "pagePath": "pages/Users/myMalfunction/myMalfunction", "text": "我的故障", "iconPath": "/images/tabbar/myweixiu1.png", "selectedIconPath": "/images/tabbar/myweixiu2.png" }, { "pagePath": "pages/logs/logs", "text": "个人中心", "iconPath": "/images/tabbar/user1.png", "selectedIconPath": "/images/tabbar/user2.png" }, { "pagePath": "pages/weixiu/myweixiu/myweixiu", "text": "我的维修", "iconPath": "/images/tabbar/myweixiu1.png", "selectedIconPath": "/images/tabbar/myweixiu1.png" }, { "pagePath": "pages/charts/charts", "text": "故障报表", "iconPath": "/images/tabbar/chart1.png", "selectedIconPath": "/images/tabbar/chart2.png" } ] }, "sitemapLocation": "sitemap.json"}可以看到全局app.json里面放了5个不同的tabbar路径
2.自定义custom-tab-bar
(详见微信官方文档)
index.js
Component({ data: { selected: 0, color: "#000000", roleId: '', selectedColor: "#1396DB", allList: [{ list1: [{ pagePath: "/pages/Users/myrepaire/myrepaire", iconPath: "/images/tabbar/weixiu1.png", selectedIconPath: "/images/tabbar/weixiu2.png", text: "我要报修" }, { pagePath: "/pages/Users/myMalfunction/myMalfunction", iconPath: "/images/tabbar/myweixiu1.png", selectedIconPath: "/images/tabbar/myweixiu2.png", text: "我的故障" }, { pagePath: "/pages/logs/logs", text: "个人中心", iconPath: "/images/tabbar/user1.png", selectedIconPath: "/images/tabbar/user2.png" }], list2: [{ pagePath: "/pages/weixiu/myweixiu/myweixiu", iconPath: "/images/tabbar/weixiu1.png", selectedIconPath: "/images/tabbar/weixiu2.png", text: "我要维修" }, { pagePath: "/pages/Users/myMalfunction/myMalfunction", iconPath: "/images/tabbar/myweixiu1.png", selectedIconPath: "/images/tabbar/myweixiu2.png", text: "我的维修" }, { pagePath: "/pages/logs/logs", text: "个人中心", iconPath: "/images/tabbar/user1.png", selectedIconPath: "/images/tabbar/user2.png" }], list3: [{ pagePath: "/pages/Users/myrepaire/myrepaire", iconPath: "/images/tabbar/weixiu1.png", selectedIconPath: "/images/tabbar/weixiu2.png", text: "我要报修" }, { pagePath: "/pages/charts/charts", iconPath: "/images/tabbar/chart1.png", selectedIconPath: "/images/tabbar/chart2.png", text: "故障报表" }, { pagePath: "/pages/logs/logs", text: "个人中心", iconPath: "/images/tabbar/user1.png", selectedIconPath: "/images/tabbar/user2.png" }] }], list: [] }, attached() { const roleId = wx.getStorageSync('statu') if (roleId == 20) { this.setData({ list: this.data.allList[0].list1 }) }else if(roleId==5){ this.setData({ list: this.data.allList[0].list3 }) }else if(roleId==102){ this.setData({ list: this.data.allList[0].list2 }) } }, methods: { switchTab(e) { const data = e.currentTarget.dataset const url = data.path wx.switchTab({ url }) this.setData({ selected: data.index }) } },})分析：
首先，小程序tabbar只识别list里面的东西
先在data中定义一个list和allList数组,把三重身份用户的list分别定义为list1,list2,list3,放入allList
const roleId = wx.getStorageSync('statu')
获取用户信息存到缓存中，根据不同和的roleId来判断是什么身份，this.setData({ list: this.data.allList[0].list2 })
根据身份把allList里面的子数组赋值给系统默认识别的`list``switchTab的作用根据不同的路径切换tabbar下标
switchTab(e) { const data = e.currentTarget.dataset const url = data.path wx.switchTab({ url }) this.setData({ selected: data.index }) }index.json
{ "usingComponents": {}}index.wxml
<cover-view class="tab-bar"> <cover-view class="tab-bar-border"></cover-view> <cover-view wx:for="{{list}}" wx:key="index" class="tab-bar-item" data-path="{{item.pagePath}}" data-index="{{index}}" bindtap="switchTab"> <cover-image class="cover-image" src="{{selected === index ? item.selectedIconPath : item.iconPath}}"></cover-image> <cover-view class="cover-view" >{{item.text}}</cover-view> </cover-view></cover-view>index.wxss
.tab-bar { position: fixed; bottom: 0; left: 0; right: 0; height: 48px; background: white; display: flex; padding-bottom: env(safe-area-inset-bottom);}.tab-bar-border { background-color: rgba(0, 0, 0, 0.33); position: absolute; left: 0; top: 0; width: 100%; height: 1px; transform: scaleY(0.5);}.tab-bar-item { flex: 1; text-align: center; display: flex; justify-content: center; align-items: center; flex-direction: column;}.tab-bar-item .cover-image { width: 44rpx; height: 44rpx;}.tab-bar-item .cover-view { margin-top: 8rpx; font-size: 24rpx;}最后，在tabbar里面设置过 pagePath的路径文件下的 xxx.js的onshow:function(){}里面设置
或者说凡是用到tabbar组件的页面对应的xx.js里的onshow:function(){}都要按照以下进行设置
不然会出现tabbar显示与点击不同步的现象
onShow: function () { if (typeof this.getTabBar === 'function' && this.getTabBar()) { this.getTabBar().setData({ selected: 0 }) } },//selected: 0就是选中的tabbar下标，根据不同页面显示不同tabbar下标结果展示
普通用户
运维人员
领导
可以看到根据用户信息里的roleId成功的切换了不同的tabbar
以上就是“微信小程序怎么根据不同用户切换不同TabBar”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注编程网行业资讯频道。
