微信小程序重写tabbar底部导航，供大家参考，具体内容如下
1.app.js代码如下：
editTabBar: function() { var e = this.globalData.tabbar, a = getCurrentPages(), t = a[a.length - 1], s = t.__route__; 0 != s.indexOf("https://www.jb51.net/") && (s = "https://www.jb51.net/" + s); for (var n in e.list) e.list[n].selected = !1, e.list[n].pagePath == s && (e.list[n].selected = !0); t.setData({ tabbar: e }); }, tabBar: { color: "#123", selectedColor: "#1ba9ba", borderStyle: "#1ba9ba", backgroundColor: "#fff", list: [ { pagePath: "/we7/pages/index/index", iconPath: "/we7/resource/icon/home.png", selectedIconPath: "/we7/resource/icon/homeselect.png", text: "首页" }, { pagePath: "/we7/pages/user/index/index", iconPath: "/we7/resource/icon/user.png", selectedIconPath: "/we7/resource/icon/userselect.png", text: "我的" } ] }, globalData: { userInfo: null, tabbar: { color: "#333", selectedColor: "#d0501f", backgroundColor: "#ffffff", borderStyle: "#d5d5d5", list: [ { pagePath: "/pages/seller/gzt", text: "工作台", iconPath: "/pages/images/gzt@3x.png", selectedIconPath: "/pages/images/gztxz@3x.png", selected: !0 }, { pagePath: "/pages/seller/cp/cplb", text: "商品", iconPath: "/pages/images/dbdc.png", selectedIconPath: "/pages/images/dbdcxz.png", selected: !1 }, position: "bottom" } },
template.wxml
<template> <view> <navigator openType="redirect" url="{{item.pagePath}}" wx:for="{{tabbar.list}}" wx:key="index"> <image src="{{item.selected?item.selectedIconPath:item.iconPath}}"></image> <text>{{item.text}}</text> </navigator> </view> </template>
3.template.wxss
.tabbar_box { display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-orient: horizontal; -webkit-box-direction: normal; -ms-flex-direction: row; flex-direction: row; -ms-flex-pack: distribute; justify-content: space-around; position: fixed; bottom: 0; left: 0; z-index: 999; width: 100%; height: 100rpx; border-top: 0.5rpx solid #d5d5d5; } .tabbar_nav { display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-orient: vertical; -webkit-box-direction: normal; -ms-flex-direction: column; flex-direction: column; -webkit-box-pack: center; -ms-flex-pack: center; justify-content: center; -webkit-box-align: center; -ms-flex-align: center; align-items: center; font-size: 25rpx; height: 100%; } .tabbar_icon { width: 40rpx; height: 40rpx; }
在需要用的页面(wxml)添加如下代码
<import src="https://www.jb51.net/template.wxml"></import>
<template is="tabbar" data="{{tabbar:tabbar}}"></template>
在需要的样式（wxss）添加如下代码
@import "template.wxss";
在需要的js页面添加如下代码：
var dsq, app = getApp();添加在顶部
tabbar: {},在data中添加
app.editTabBar();在onLoad中添加