小程序弹出菜单的实现

需求

点击标签栏按钮，向下弹出菜单，再次点击，收回菜单

---

要解决的问题

1. 标签栏三栏样式，标签栏固定不动；
2. 点击标签栏弹出菜单，并且出现透明遮罩；
3. 遮罩优先级在弹出框之下；
4. 弹出框内标签的设置；
5. 滚动栏滚动条的隐藏

---

如何解决？

1. 弹性布局，横向，三者平分整栏;
2. 状态监听点击事件，数据控制hide或者show,通过rgba设置透明度
3. 弹出框设置z-index；
4. 弹性布局flex 横向排列 超出后wrap 然后space-around控制间距
5. ::-webkit-scrollbar {
   width: 0;
   height: 0;
   color: transparent;

}

---

具体实现

wxml

<import src="../../templates/template" />
<view class="container {{isMask?'mask':''}}">
    <view class="header">
        <view class="filterCity {{status=='1' && isActive?'active':''}}" data-status='1' bindtap="changeStatus">
            <view class="city">城市筛选</view>
            <image src="{{status=='1' && isActive?'../../youzan-image/red-up.png':'../../youzan-image/down.png'}}" />
        </view>
        <view class="filterJob {{status=='2' && isActive?'active':''}}" data-status='2' bindtap="changeStatus">
            <view class="job">职位筛选</view>
            <image src="{{status=='2' && isActive?'../../youzan-image/red-up.png':'../../youzan-image/down.png'}}" />
        </view>
        <view class="filterOrder {{status=='3'&& isActive?'active':''}}" data-status='3' bindtap="changeStatus">
            <view class="order">排序方式</view>
            <image src="{{status=='3' && isActive?'../../youzan-image/red-up.png':'../../youzan-image/down.png'}}" />
        </view>
    </view>
    <block wx:if="{{isActive==true&&status=='1'}}">
        <view class="cityContainer">
            <block wx:for="{{city}}" wx:key="id" wx:for-index="index">
                <view class="city {{isSelect&&index==curIndex?'select':''}}" data-index="{{index}}" bindtap="select">{{item}}</view>
            </block>
        </view>
    </block>
    <block wx:if="{{isActive==true&&status=='2'}}">
        <scroll-view scroll-y="true" class="posContainer">
            <block wx:for="{{cur}}" data-index='index' wx:for-index='index' wx:key="index">
                <view class="title">{{item.title}}</view>
                <view class="poscontent">
                    <view  wx:for="{{item.types}}" wx:for-item="type" wx:key='id' wx:for-index="{{index}}" data-index="{{index}}">
                        <view class="tag {{isSelect&&index==curIndex?'select':''}}" data-id="{{id}}" bindtap="multiSelect">{{type}}</view>
                    </view>
                </view>
            </block>
            <view class="confirm">
                <button class="weui-btn" type="warn">确认</button>
            </view>
        </scroll-view>
    </block>
    <block wx:if="{{isActive==true&&status=='3'}}">
        <view class="orderContainer">
            <view class="block">智能排序</view>
            <view class="block">时间排序</view>
            <view class="block">薪资排序</view>
        </view>
    </block>
    <view class="listContainer"  >
        <view wx:for="{{jobList}}" wx:key="index" data-index="{{index}}">
            <template is="list-item" data="{{...item}}" />
        </view>
    </view>
    <view class="search " bindtap="search">
        <image src="../../youzan-image/search.png" />
        <text>搜索</text>
    </view>

</view>

wxss

page {
    position: relative;
    width: 100%;
    height: 100vh;
}

.header {
    width: 100%;
    height: 80rpx;
    position: fixed;
    top: 0;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    text-align: center;
    color: #313131;
    font-size: 16px;
    border-bottom: 1rpx solid #eeeeee;
    z-index: 9999;
    background-color: #fff;
}

.filterCity {
    flex: 1;
    position: relative;
    height: 80rpx;
    line-height: 80rpx;
}

.filterJob {
    position: relative;
    flex: 1;
    height: 80rpx;
    line-height: 80rpx;
}

.filterOrder {
    position: relative;
    flex: 1;
    height: 80rpx;
    line-height: 80rpx;
}

.header image {
    position: absolute;
    right: 15rpx;
    top: 26rpx;
    width: 30rpx;
    height: 30rpx;
}

.active {
    color: #ef0001;
}

.mask {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 80rpx;
    background-color: rgba(15, 15, 26, 0.3);
}

.cityContainer {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: space-between;
    flex-wrap: wrap;
    width: 100%;
    height: 300rpx;
    z-index: 999;
    background-color: #fff;
    border-bottom: 1rpx solid #e9e9e9;
    padding-bottom: 130rpx;
}

.cityContainer .city {
    display: block;
    font-size: 15px;
    margin-top: 100rpx;
    width: 150rpx;
    height: 50rpx;
    line-height: 50rpx;
    text-align: center;
    border: 1rpx solid #e9e9e9;
    overflow: hidden;
}

.select {
    color: #ffffff;
    background-color: #ed0000;
}

.posContainer {
    height: 980rpx;
    width: 100%;
    background-color: #fff;
    /* overflow:auto; */
}

::-webkit-scrollbar {
    width: 0;
    height: 0;
    color: transparent;
}

.title {
    margin-top: 55rpx;
    font-size: 15px;
    margin-left: 28rpx;
}

.poscontent {
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: -15rpx;
}

.tag {
    margin-left: 28rpx;
    margin-top: 23rpx;
    font-size: 13px;
    width: 150rpx;
    height: 50rpx;
    line-height: 50rpx;
    text-align: center;
    border: 1rpx solid #e9e9e9;
}

.confirm {
    width: 100%;
    height: 150rpx;
    border: 1rpx solid transparent;
    background-color: #fff;
}

.weui-btn {
    position: fixed;
    width: 95%;
    bottom: 52rpx;
    left: 50%;
    transform: translateX(-50%);
}

.orderContainer {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    background-color: #fff;
    width: 100%;
    height: 125rpx;
}

.block {
    font-size: 13px;
    width: 200rpx;
    height: 50rpx;
    line-height: 50rpx;
    text-align: center;
    border: 1rpx solid #e9e9e9;
}

.search {
    position: fixed;
    bottom: 80rpx;
    background-color: #fff;
    right: 25rpx;
    width: 150rpx;
    height: 75rpx;
    line-height: 75rpx;
    text-align: center;
    border-radius: 35rpx;
    box-shadow: 1rpx 1rpx 7rpx 7rpx #f5f5f5;
}

.search image {
    width: 30rpx;
    height: 30rpx;
}

.search text {
    font-size: 15px;
    padding-left: 9rpx;
    color: #666666;
}

.listContainer {
    width: 100%;
    height: 100%;
    margin-top: 80rpx;
}

js

import category from '../../api/employ'
import jobList from '../../api/detail'
Page({
  data: {
    curIndex: '',
    isActive: false,
    jobList:[],
    cur: [],
    job: [],
    isShow: true,
    status: 0,
    isMask: false,
    isSelect: false,
    city: ['全国', '杭州', '北京', '深圳', '上海', '广州', '武汉', '重庆']
  },
  changeStatus(e) {
    let status = e.currentTarget.dataset.status;
    let cur = category;
    this.setData({
      isActive: !this.data.isActive,
      status: status,
      isMask: !this.data.isMask,
      cur: cur,
    })
  },
  select(e) {
    let curIndex = e.currentTarget.dataset.index;
    this.setData({
      isSelect: " curIndex == this.data.curIndex ? '!this.data.isActive' : 'true' ",
      isActive: false,
      isMask:false,
      curIndex: curIndex,
    })
  },
  multiSelect(e){
   let  multiIndex=e.currentTarget.dataset.index;
   this.setData({
     isSelect:!this.data.isSelect,
     curIndex:multiIndex
   })
  },
  search(e) {
    wx.navigateTo({
      url: '../search/search',
    })
  },
  onLoad: function (e) {
    this.setData({
      jobList:jobList
    })
  },
  click:function (e) {
    let id =e.currentTarget.dataset.id;
    wx.navigateTo({
      url: `../detail/detail?id=${id}`,
    })
  }
})