微信小程序自定义tabbar问题怎么解决

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1、首先按照官方组件在app.json中定义tabbar

"tabBar": {    "custom": true,    "backgroundColor": "#FFFFFF",    "borderStyle": "white",    "list": [      {        "pagePath": "pages/index/index",        "text": "首页",        "iconPath": "./images/home.png",        "selectedIconPath": "./images/home.png"      },      {        "pagePath": "pages/me/me",        "text": "个人中心",        "iconPath": "./images/me.png",        "selectedIconPath": "./images/me.png"      }    ]  },"usingComponents": {}

2、在项目根目录创建自定义tabbar组件

划重点：根目录，请看下图，不放根目录会导致this.getTabBar = null

3、组件内容如下：

• custom-tab-bar/index.js

Component({  data: {    selected: 0,    color: "#7A7E83",    selectedColor: "#3cc51f",    list: [{      pagePath: "../../pages/index/index",      iconPath: "../images/home.png",      selectedIconPath: "../images/home.png",      text: "首页"    }, {      pagePath: "../../pages/me/me",      iconPath: "../images/me.png",      selectedIconPath: "../images/me.png",      text: "个人中心"    }]  },  attached() {  },  methods: {    switchTab(e) {      const data = e.currentTarget.dataset      const url = data.path      wx.switchTab({url})      this.setData({        selected: data.index      })    }  }})

• custom-tab-bar/index.json

{  "component": true}

• custom-tab-bar/index.wxml

            {{item.text}}  

• custom-tab-bar/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: 27px;  height: 27px;}.tab-bar-item cover-view {  font-size: 10px;}

4、在pages下的各个页面组件引入tabbar

以首页举例：

• pages/index.json

{  "usingComponents": {    "custom-tab-bar": "../../custom-tab-bar/index"  }}

• pages/index.js

Page({  onShow: function () {    if (typeof this.getTabBar === 'function' && this.getTabBar()) {      this.getTabBar().setData({        selected: 0      })    }  }})

• pages/index.wxml

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