0. 文档位置

自定义tabbarhttps://developers.weixin.qq.com/miniprogram/dev/framework/ability/custom-tabbar.html

 1. 使用

1.1 随便创建一个文件夹---创建一个commponent

1.2 html

<!--miniprogram/custom-tab-bar/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">

    <block wx:if="{{ index === 1 }}" >
      <cover-view class="pub">{{item.text}}</cover-view>
    </block>
    <block wx:else>
      <cover-image src="{{selected === index ? item.selectedIconPath : item.iconPath}}"></cover-image>
    <cover-view style="color: {{selected === index ? selectedColor : color}}">{{item.text}}</cover-view>
    </block>
  
  </cover-view>
</cover-view>

1.3 css

.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;
}
.pub {
  background-color: #fa3d;
  height: 80rpx;
  width: 80rpx;
  border-radius: 50%;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

1.4 js

var app = getApp();
Component({

  properties: {
    selected: {
      type: Number, // html选中找两个地方，一个data，一个属性
      value: 0
    }
  },
  data: {
    color: "#7A7E83", // 颜色
    selectedColor: "#FF0000", // 被选中颜色
    list: [{
        pagePath: "/pages/index/index",
        iconPath: "/static/tabbar/no.png",
        selectedIconPath: "/static//tabbar/yes.png",
        text: "首页"
      },
      {
        text: "发布"
      },
      {
        pagePath: "/pages/home/home",
        iconPath: "/static/tabbar/no.png",
        selectedIconPath: "/static/tabbar/yes.png",
        text: "我的"
      }
    ]
  },
  attached() {},
  methods: {
    switchTab(e) {
      var data = e.currentTarget.dataset // const常量
      var url = data.path
      // 跳转非tababr
      // wx.navigateTo({
      //   url: url,
      // })
      // 跳转tababr
      // 如果·有path
      if (url) {
        wx.switchTab({
          url
        })
      } else {
        if (app.globalData.userinfo) {
          wx.navigateTo({
            url: '/pages/upload/upload',
          })
        } else {
          wx.navigateTo({
            url: '/pages/login/login',
          })
        }
      }


      // this.setData({
      //   selected: data.index
      // })
    }
  }
})

1.5 全局app.json配置

"tabBar": {
    "selectedColor": "#FF0000",
    "custom": true,
    "list": [
      {
        "pagePath": "pages/index/index",
        "text": "首页",
        "iconPath": "/static/tabbar/no.png",
        "selectedIconPath": "/static//tabbar/yes.png"
      },
      {
        "pagePath": "pages/home/home",
        "text": "我的",
        "iconPath": "/static/tabbar/no.png",
        "selectedIconPath": "/static/tabbar/yes.png"
      }
      
    ]
  },

1.6 使用的界面配置(在哪个界面使用了，就在哪个界面配置)

1.6.1 app.json

{
  "usingComponents": {
    "tabber": "/commponents/tabbar"
  }
}

1.6.2 html(写在最后/最前)  这个页面是我的 索引为2

<!--选中的索引，根据tabbar中js配的菜单位置，自己调整-->
<tabber selected="{{ 2 }}"></tabber>