uniapp 中自定义的tabbbar导航栏_uniapp custom-tab-bar使用

1.前言

        在uniapp中我们需要自定义tabbar，而不去使用pages.json内的tabbar配置项。

2.版本

        uniapp vue3版本

3.过程

3.1.修改pages.json

        找到pages.json文件，删除pathPath以外的属性。

"tabBar": {
    "list": [{
        "pagePath": "pages/home/home"
      },
      {
        "pagePath": "pages/my/my"
      }
    ]
  },

3.2.隐藏原生tabbar并添加全局变量tabbarIndex

<script setup>
import { onLaunch, } from "@dcloudio/uni-app";
getApp().globalData = {
  tabbarIndex: 0,
};
onLaunch(() => {
  uni.hideTabBar();
});
</script>

3.3.创建tabbar组件

<template>
  <view class="tabBarRow">
    <view
      v-for="(item, index) in list"
      :key="index"
      :class="['tabBarItem', index == tabbarIndex ? 'selctedIcon' : 'icon']"
      @click="changeTabBar(index)"
    >
      <image :src="index == tabbarIndex ? item.selectedIcon : item.icon"></image>
    </view>
  </view>
</template>
 
<script setup lang="ts">
import { reactive, ref } from "vue";
 
const tabbarIndex = ref(getApp().globalData.tabbarIndex);//获取全局变量tabbarIndex
const list = reactive([
  {
    label: "首页",
    path: "/pages/home/home",
    icon: "/static/tabbar/home_icon.png",
    selectedIcon: "/static/tabbar/home_icon_selected.png",
  },
  {
    label: "我的",
    path: "/pages/my/my",
    icon: "/static/tabbar/my_icon.png",
    selectedIcon: "/static/tabbar/my_icon_selected.png",
  },
]);
 
function changeTabBar(index) {
  console.log("changeTabBar", index);
  getApp().globalData.tabbarIndex = index; //切换菜单时修改全局变量tabbarIndex
  uni.switchTab({
    url: list[index].path,
  });
}
</script>
 
<style scoped>
.tabBarRow {
  flex-direction: row;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  align-items: center;
  justify-items: center;
  width: 100%;
  height: 124rpx;
  background-color: white;
  position: fixed;
  bottom: 0;
  z-index: 999;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12), 0 0 6px rgba(0, 0, 0, 0.04);
  /* padding-bottom: 40rpx */
}
 
.tabBarItem {
  height: 100rpx;
  width: 100rpx;
  position: relative;
  top: -24rpx;
}
 
.selctedIcon {
  height: 146rpx;
  width: 146rpx;
}
 
.icon {
  height: 96rpx;
  width: 96rpx;
}
 
.tabBarItem image {
  height: 100%;
  width: 100%;
}
</style>

3.4.在所有菜单中引入tabbar组件

<template>
  <tabbar></tabbar>
</template>
 
<script setup lang="ts">
import tabbar from "@/components/tabbar/tabbar.vue";
 
</script>

4.结尾

这样就完成了uniapp的自定义tabbar组件了。