原生小程序自定义 tabBar

原生小程序自定义 tabBar

步骤:

1.配置信息

在 app.json 中的 tabBar 项指定 custom 字段，同时其余 tabBar 相关配置也补充完整。

{
  "tabBar": {
    "custom": true,
    "color": "#000000",
    "selectedColor": "#000000",
    "backgroundColor": "#000000",
    "list": [{
      "pagePath": "page/component/index",
      "text": "组件"
    }, {
      "pagePath": "page/API/index",
      "text": "接口"
    }]
  },
  "usingComponents": {}
}

2.添加tabBar代码文件 (这一个文件夹都要添加进去)

可以去官网:指南里面有一个自定义tabBar ,里面有方法

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-OhuFNlnk-1593522300892)(C:\Users\l\AppData\Roaming\Typora\typora-user-images\image-20200630204716857.png)]

3.在这个文件夹里面修改内容

index.js:::

Component({
  data: {
    active: 0,
    color: "#7A7E83",
    selectedColor: "#3cc51f",
    list: [{
      "pagePath": "pages/home/home",
      "text": "home",
      "iconPath": "/assest/tabs/home.png",
      "selectedIconPath": "/assest/tabs/home-active.png",
      "icon": "home-o"
    },
    {
      "pagePath": "pages/message/message",
      "text": "message",
      "iconPath": "/assest/tabs/message.png",
      "selectedIconPath": "/assest/tabs/message-active.png",
      "icon": "friends-o"
    },
    {
      "pagePath": "pages/profile/profile",
      "text": "profile",
      "iconPath": "/assest/tabs/profile.png",
      "selectedIconPath": "/assest/tabs/profile-active.png",
      "icon": "setting-o"
    }
    ]
  },
  onLoad() {
    this.setData({
      active: 0
    })
  }
  ,
  attached() {
  },
  methods: {
    switchTab(e) {
      wx.switchTab({
        url: "/" + this.data.list[e.detail].pagePath
      })
    }
  }
})

index.json::::

{
  "usingComponents": {
    "van-tabbar": "../weapp/dist/tabbar",
    "van-tabbar-item": "../weapp/dist/tabbar-item/index"
  }
}

index.wxml:::

<van-tabbar active="{{ active }}" bind:change="switchTab">
  <van-tabbar-item icon="{{item.icon}}" wx:for="{{list}}" data-path="{{item.pagePath}}" data-index="{{index}}"
    wx:index="{{index}}">{{item.text}}
  van-tabbar-item>
van-tabbar>

4.修复一些跳转的bug:::(官方组件带来的bug)

在app.js里面添加

 globalData: {
    host: '  http://localhost:3000/',
    active: 0
  }

同时,在每个需要跳转的页面的onShow生命周期函数里面写上::

 onShow: function () {
    if (typeof this.getTabBar === 'function' &&
      this.getTabBar()) {
      this.getTabBar().setData({
        active: 0//这里,第一个页面就写 0 第二个就写 1.....
      })
    }
  }