微信小程序原生实现自定义tabBar_自定义tabbar小程序高度px

1. 需要在app.json中的tabBar的custom设置成true；

2.  在src下的创建custom-tab-bar文件夹(和pages同级)；

3. 在custom-tab-bar文件夹里面的文件编写代码；

// index.wxml
<view class="tab-bar">
  <view class="tab-bar-border"></view>
//此处的wx:key也可以使用下标index 官网使用的是下标 
  <view wx:for="{{list}}" wx:key="item.id" class="tab-bar-item {{item.id === 2 ? 'jumped' : ''}}">
    <image src="{{selected === item.id ? item.selectedIconPath : item.iconPath}}" bindtap="switchTab" data-path="{{item.pagePath}}" data-id="{{item.id}}"></image>
    <view style="color: {{selected === item.id ? selectedColor : color}}">{{item.text}}</view>
  </view>
</view>
 
//index.js
Component({
  data: {
    selected: 0,
    "list": [{
        "id": 0,
        "pagePath": "/pages/index/index",
        "text": "首页",
        "iconPath": "/images/index.png",
        "selectedIconPath": "/images/index1.png"
      },
      {
        "id": 1,
        "pagePath": "/pages/tools/index",
        "text": "工具",
        "iconPath": "/images/gongju.png",
        "selectedIconPath": "/images/gongju1.png"
      },
      {
        "id": 2,
        "pagePath": "/pages/center/index",
        "text": "",
        "iconPath": "/images/huangtao.png",
        "selectedIconPath": "/images/huangtao.png"
      },
      {
        "id": 3,
        "pagePath": "/pages/test/index",
        "text": "题库",
        "iconPath": "/images/xitiku.png",
        "selectedIconPath": "/images/xitiku1.png"
      },
      {
        "id": 4,
        "pagePath": "/pages/my/index",
        "text": "我的",
        "iconPath": "/images/user.png",
        "selectedIconPath": "/images/user1.png"
      }
    ]
  },
  attached() {},
  methods: {
    switchTab(e) {
      console.log('e', e)
      const data = e.currentTarget.dataset
      const url = data.path
      wx.switchTab({
        url
      })
      this.setData({
        selected: data.id
      })
    }
  }
})
 
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: #FF952C; */
  opacity: 0.2;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4rpx;
  transform: scaleY(0.5);
  /* animation: wave infinite linear 1s; */
}
 
.tab-bar-item {
  flex: 1;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
 
.tab-bar-item image {
  width: 27px;
  height: 27px;
}
 
.tab-bar-item view {
  font-size: 10px;
}
 
 

4. 在每个pagePath的文件的index.js的onShow插入以下代码

// 修改selected的值 每个pagePath页面的selected值都是不一样的，具体以需求为准
 if (typeof this.getTabBar === 'function' && this.getTabBar()) {
      this.getTabBar().setData({
        selected: 2
      })
    }

官网地址：自定义 tabBar | 微信开放文档

自定义tabBar 写法和普通切换tab的写法基本一致，自定义tabBar 是写成了组件的形式

后续自定义tabBar遇到的问题及解决还会更新文档！ 敬请期待吧！