小程序自定义底部导航。。。干货。。。custom-tab-bar得使用

1、首先 app.json文件 找到 tabBar 添加 “custom”: true 开启自定义tabBar

2、根目录下新建custom-tab-bar目录 新建index(Component组件)**必须是index命名

2.1 wxml 文件

<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">
    <cover-image src="{{selected === index ? item.selectedIconPath : item.iconPath}}"></cover-image>
    <cover-view style="color: {{selected === index ? selectedColor : color}};font-size:28rpx;margin-top:6rpx;">{{item.text}}</cover-view>
  </cover-view>
</cover-view>

1
2
3
4
5
6
7
8

2.2 wxss文件

.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding-top: 20rpx;
  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: 2rpx;
  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: 54rpx;
  height: 54rpx;
  margin-bottom: 10rpx;
}

.tab-bar-item cover-view {
  font-size: 20rpx;
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

2.3 js文件

Component({
  data: {
    selected: 0,
    color: "#7A7E83",
    selectedColor: "#cf000e",
    "list": [
      {
        "pagePath": "/pages/index/index",
        "text": "首页",
        "iconPath": "/img/home.png",
        "selectedIconPath": "/img/home_on.png"
      },
      {
        "pagePath": "/pages/category/category",
        "text": "分类",
        "iconPath": "/img/sort.png",
        "selectedIconPath": "/img/sort_on.png"
      },
      {
        "pagePath": "/pages/shoppingcart/tabBarCart",
        "text": "购物车",
        "iconPath": "/img/cart.png",
        "selectedIconPath": "/img/cart_on.png"
      },
      {
        "pagePath": "/pages/mine/mine",
        "text": "我的",
        "iconPath": "/img/my.png",
        "selectedIconPath": "/img/my_on.png"
      }
    ]
  },
  onshow() {
    console.log('onshow.....')
  },
  methods: {
    switchTab(e) {
      const data = e.currentTarget.dataset
      console.log(data)
      const url = data.path
      wx.switchTab({ url })
      console.log(e)
      this.setData({
        selected: data.index
      })
    }
  }
})
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49

2.4 json文件

{
  "component": true
}
1
2
3

3.使用~