微信版的下拉列表

好了，我也是个小白我们先去看看微信官方文档给的小程序下拉列表做法：

下拉列表一看就是表单里的我们先看看表单中picker也就是下拉列表的别样显示

 属性就不详细上了，想了解做的过程属性到https://developers.weixin.qq.com/miniprogram/dev/component/picker.html

示例代码：

index.wxml

<view class="section">
  <view class="section__title">普通选择器</view>
  <picker bindchange="bindPickerChange" value="{{index}}" range="{{array}}">
    <view class="picker">
      当前选择：{{array[index]}}
    </view>
  </picker>
</view>
<view class="section">
  <view class="section__title">多列选择器</view>
  <picker mode="multiSelector" bindchange="bindMultiPickerChange" bindcolumnchange="bindMultiPickerColumnChange" value="{{multiIndex}}" range="{{multiArray}}">
    <view class="picker">
      当前选择：{{multiArray[0][multiIndex[0]]}}，{{multiArray[1][multiIndex[1]]}}，{{multiArray[2][multiIndex[2]]}}
    </view>
  </picker>
</view>
<view class="section">
  <view class="section__title">时间选择器</view>
  <picker mode="time" value="{{time}}" start="09:01" end="21:01" bindchange="bindTimeChange">
    <view class="picker">
      当前选择: {{time}}
    </view>
  </picker>
</view>

<view class="section">
  <view class="section__title">日期选择器</view>
  <picker mode="date" value="{{date}}" start="2015-09-01" end="2017-09-01" bindchange="bindDateChange">
    <view class="picker">
      当前选择: {{date}}
    </view>
  </picker>
</view>
<view class="section">
  <view class="section__title">省市区选择器</view>
  <picker mode="region" bindchange="bindRegionChange" value="{{region}}" custom-item="{{customItem}}">
    <view class="picker">
      当前选择：{{region[0]}}，{{region[1]}}，{{region[2]}}
    </view>
  </picker>
</view>

index.js

Page({
  data: {
    array: ['美国', '中国', '巴西', '日本'],
    objectArray: [
      {
        id: 0,
        name: '美国'
      },
      {
        id: 1,
        name: '中国'
      },
      {
        id: 2,
        name: '巴西'
      },
      {
        id: 3,
        name: '日本'
      }
    ],
    index: 0,
    multiArray: [['无脊柱动物', '脊柱动物'], ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物'], ['猪肉绦虫', '吸血虫']],
    objectMultiArray: [
      [
        {
          id: 0,
          name: '无脊柱动物'
        },
        {
          id: 1,
          name: '脊柱动物'
        }
      ], [
        {
          id: 0,
          name: '扁性动物'
        },
        {
          id: 1,
          name: '线形动物'
        },
        {
          id: 2,
          name: '环节动物'
        },
        {
          id: 3,
          name: '软体动物'
        },
        {
          id: 3,
          name: '节肢动物'
        }
      ], [
        {
          id: 0,
          name: '猪肉绦虫'
        },
        {
          id: 1,
          name: '吸血虫'
        }
      ]
    ],
    multiIndex: [0, 0, 0],
    date: '2016-09-01',
    time: '12:01',
    region: ['广东省', '广州市', '海珠区'],
    customItem: '全部'
  },
  bindPickerChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      index: e.detail.value
    })
  },
  bindMultiPickerChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      multiIndex: e.detail.value
    })
  },
  bindMultiPickerColumnChange: function (e) {
    console.log('修改的列为', e.detail.column, '，值为', e.detail.value);
    var data = {
      multiArray: this.data.multiArray,
      multiIndex: this.data.multiIndex
    };
    data.multiIndex[e.detail.column] = e.detail.value;
    switch (e.detail.column) {
      case 0:
        switch (data.multiIndex[0]) {
          case 0:
            data.multiArray[1] = ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物'];
            data.multiArray[2] = ['猪肉绦虫', '吸血虫'];
            break;
          case 1:
            data.multiArray[1] = ['鱼', '两栖动物', '爬行动物'];
            data.multiArray[2] = ['鲫鱼', '带鱼'];
            break;
        }
        data.multiIndex[1] = 0;
        data.multiIndex[2] = 0;
        break;
      case 1:
        switch (data.multiIndex[0]) {
          case 0:
            switch (data.multiIndex[1]) {
              case 0:
                data.multiArray[2] = ['猪肉绦虫', '吸血虫'];
                break;
              case 1:
                data.multiArray[2] = ['蛔虫'];
                break;
              case 2:
                data.multiArray[2] = ['蚂蚁', '蚂蟥'];
                break;
              case 3:
                data.multiArray[2] = ['河蚌', '蜗牛', '蛞蝓'];
                break;
              case 4:
                data.multiArray[2] = ['昆虫', '甲壳动物', '蛛形动物', '多足动物'];
                break;
            }
            break;
          case 1:
            switch (data.multiIndex[1]) {
              case 0:
                data.multiArray[2] = ['鲫鱼', '带鱼'];
                break;
              case 1:
                data.multiArray[2] = ['青蛙', '娃娃鱼'];
                break;
              case 2:
                data.multiArray[2] = ['蜥蜴', '龟', '壁虎'];
                break;
            }
            break;
        }
        data.multiIndex[2] = 0;
        console.log(data.multiIndex);
        break;
    }
    this.setData(data);
  },
  bindDateChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      date: e.detail.value
    })
  },
  bindTimeChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      time: e.detail.value
    })
  },
  bindRegionChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      region: e.detail.value
    })
  }
})

index.wxss

@import "../lib/weui.wxss";
.picker{
    padding: 13px;
    background-color: #FFFFFF;
}

lib下的weui。wxss

/*!
 * weui.js v1.1.0 (https://github.com/weui/weui-wxss)
 * Copyright 2016, wechat ui team
 * MIT license
 */
page {
  line-height: 1.6;
  font-family: -apple-system-font, "Helvetica Neue", sans-serif;
}
icon {
  vertical-align: middle;
}
.weui-cells {
  position: relative;
  margin-top: 1.17647059em;
  background-color: #FFFFFF;
  line-height: 1.41176471;
  font-size: 17px;
}
.weui-cells:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid #D9D9D9;
  color: #D9D9D9;
}
.weui-cells:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1rpx solid #D9D9D9;
  color: #D9D9D9;
}
.weui-cells__title {
  margin-top: .77em;
  margin-bottom: .3em;
  padding-left: 15px;
  padding-right: 15px;
  color: #999999;
  font-size: 14px;
}
.weui-cells_after-title {
  margin-top: 0;
}
.weui-cells__tips {
  margin-top: .3em;
  color: #999999;
  padding-left: 15px;
  padding-right: 15px;
  font-size: 14px;
}
.weui-cell {
  padding: 10px 15px;
  position: relative;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
          align-items: center;
}
.weui-cell:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid #D9D9D9;
  color: #D9D9D9;
  left: 15px;
}
.weui-cell:first-child:before {
  display: none;
}
.weui-cell_active {
  background-color: #ECECEC;
}
.weui-cell_primary {
  -webkit-box-align: start;
  -webkit-align-items: flex-start;
          align-items: flex-start;
}
.weui-cell__bd {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
}
.weui-cell__ft {
  text-align: right;
  color: #999999;
}
.weui-cell_access {
  color: inherit;
}
.weui-cell__ft_in-access {
  padding-right: 13px;
  position: relative;
}
.weui-cell__ft_in-access:after {
  content: " ";
  display: inline-block;
  height: 6px;
  width: 6px;
  border-width: 2px 2px 0 0;
  border-color: #C8C8CD;
  border-style: solid;
  -webkit-transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
          transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
  position: relative;
  top: -2px;
  position: absolute;
  top: 50%;
  margin-top: -4px;
  right: 2px;
}
.weui-cell_link {
  color: #586C94;
  font-size: 14px;
}
.weui-cell_link:active {
  background-color: #ECECEC;
}
.weui-cell_link:first-child:before {
  display: block;
}
.weui-icon-radio {
  margin-left: 3.2px;
  margin-right: 3.2px;
}
.weui-icon-checkbox_circle,
.weui-icon-checkbox_success {
  margin-left: 4.6px;
  margin-right: 4.6px;
}
.weui-check__label:active {
  background-color: #ECECEC;
}
.weui-check {
  position: absolute;
  left: -9999px;
}
.weui-check__hd_in-checkbox {
  padding-right: 0.35em;
}
.weui-cell__ft_in-radio {
  padding-left: 0.35em;
}
.weui-cell_input {
  padding-top: 0;
  padding-bottom: 0;
}
.weui-label {
  width: 105px;
  word-wrap: break-word;
  word-break: break-all;
}
.weui-input {
  height: 2.58823529em;
  min-height: 2.58823529em;
  line-height: 2.58823529em;
}
.weui-toptips {
  position: fixed;
  -webkit-transform: translateZ(0);
          transform: translateZ(0);
  top: 0;
  left: 0;
  right: 0;
  padding: 5px;
  font-size: 14px;
  text-align: center;
  color: #FFFFFF;
  z-index: 5000;
  word-wrap: break-word;
  word-break: break-all;
}
.weui-toptips_warn {
  background-color: #E64340;
}
.weui-textarea {
  display: block;
  width: 100%;
}
.weui-textarea-counter {
  color: #B2B2B2;
  text-align: right;
}
.weui-textarea-counter_warn {
  color: #E64340;
}
.weui-cell_warn {
  color: #E64340;
}
.weui-form-preview {
  position: relative;
  background-color: #FFFFFF;
}
.weui-form-preview:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid #D9D9D9;
  color: #D9D9D9;
}
.weui-form-preview:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1rpx solid #D9D9D9;
  color: #D9D9D9;
}
.weui-form-preview__value {
  font-size: 14px;
}
.weui-form-preview__value_in-hd {
  font-size: 26px;
}
.weui-form-preview__hd {
  position: relative;
  padding: 10px 15px;
  text-align: right;
  line-height: 2.5em;
}
.weui-form-preview__hd:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1rpx solid #D9D9D9;
  color: #D9D9D9;
  left: 15px;
}
.weui-form-preview__bd {
  padding: 10px 15px;
  font-size: .9em;
  text-align: right;
  color: #999999;
  line-height: 2;
}
.weui-form-preview__ft {
  position: relative;
  line-height: 50px;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
}
.weui-form-preview__ft:after {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid #D5D5D6;
  color: #D5D5D6;
}
.weui-form-preview__item {
  overflow: hidden;
}
.weui-form-preview__label {
  float: left;
  margin-right: 1em;
  min-width: 4em;
  color: #999999;
  text-align: justify;
  text-align-last: justify;
}
.weui-form-preview__value {
  display: block;
  overflow: hidden;
  word-break: normal;
  word-wrap: break-word;
}
.weui-form-preview__btn {
  position: relative;
  display: block;
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
  color: #3CC51F;
  text-align: center;
}
.weui-form-preview__btn:after {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  bottom: 0;
  border-left: 1rpx solid #D5D5D6;
  color: #D5D5D6;
}
.weui-form-preview__btn:first-child:after {
  display: none;
}
.weui-form-preview__btn_active {
  background-color: #EEEEEE;
}
.weui-form-preview__btn_default {
  color: #999999;
}
.weui-form-preview__btn_primary {
  color: #0BB20C;
}
.weui-cell_select {
  padding: 0;
}
.weui-select {
  position: relative;
  padding-left: 15px;
  padding-right: 30px;
  height: 2.58823529em;
  min-height: 2.58823529em;
  line-height: 2.58823529em;
  border-right: 1rpx solid #D9D9D9;
}
.weui-select:before {
  content: " ";
  display: inline-block;
  height: 6px;
  width: 6px;
  border-width: 2px 2px 0 0;
  border-color: #C8C8CD;
  border-style: solid;
  -webkit-transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
          transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
  position: relative;
  top: -2px;
  position: absolute;
  top: 50%;
  right: 15px;
  margin-top: -4px;
}
.weui-select_in-select-after {
  padding-left: 0;
}
.weui-cell__hd_in-select-after,
.weui-cell__bd_in-select-before {
  padding-left: 15px;
}
.weui-cell_vcode {
  padding-right: 0;
}
.weui-vcode-img {
  margin-left: 5px;
  height: 2.58823529em;
  vertical-align: middle;
}
.weui-vcode-btn {
  display: inline-block;
  height: 2.58823529em;
  margin-left: 5px;
  padding: 0 0.6em 0 0.7em;
  border-left: 1px solid #E5E5E5;
  line-height: 2.58823529em;
  vertical-align: middle;
  font-size: 17px;
  color: #3CC51F;
  white-space: nowrap;
}
.weui-vcode-btn:active {
  color: #52a341;
}
.weui-cell_switch {
  padding-top: 6px;
  padding-bottom: 6px;
}
.weui-uploader__hd {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  padding-bottom: 10px;
  -webkit-box-align: center;
  -webkit-align-items: center;
          align-items: center;
}
.weui-uploader__title {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
}
.weui-uploader__info {
  color: #B2B2B2;
}
.weui-uploader__bd {
  margin-bottom: -4px;
  margin-right: -9px;
  overflow: hidden;
}
.weui-uploader__file {
  float: left;
  margin-right: 9px;
  margin-bottom: 9px;
}
.weui-uploader__img {
  display: block;
  width: 79px;
  height: 79px;
}
.weui-uploader__file_status {
  position: relative;
}
.weui-uploader__file_status:before {
  content: " ";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.5);
}
.weui-uploader__file-content {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  color: #FFFFFF;
}
.weui-uploader__input-box {
  float: left;
  position: relative;
  margin-right: 9px;
  margin-bottom: 9px;
  width: 77px;
  height: 77px;
  border: 1px solid #D9D9D9;
}
.weui-uploader__input-box:before,
.weui-uploader__input-box:after {
  content: " ";
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  background-color: #D9D9D9;
}
.weui-uploader__input-box:before {
  width: 2px;
  height: 39.5px;
}
.weui-uploader__input-box:after {
  width: 39.5px;
  height: 2px;
}
.weui-uploader__input-box:active {
  border-color: #999999;
}
.weui-uploader__input-box:active:before,
.weui-uploader__input-box:active:after {
  background-color: #999999;
}
.weui-uploader__input {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}
.weui-article {
  padding: 20px 15px;
  font-size: 15px;
}
.weui-article__section {
  margin-bottom: 1.5em;
}
.weui-article__h1 {
  font-size: 18px;
  font-weight: 400;
  margin-bottom: .9em;
}
.weui-article__h2 {
  font-size: 16px;
  font-weight: 400;
  margin-bottom: .34em;
}
.weui-article__h3 {
  font-weight: 400;
  font-size: 15px;
  margin-bottom: .34em;
}
.weui-article__p {
  margin: 0 0 .8em;
}
.weui-msg {
  padding-top: 36px;
  text-align: center;
}
.weui-msg__link {
  display: inline;
  color: #586C94;
}
.weui-msg__icon-area {
  margin-bottom: 30px;
}
.weui-msg__text-area {
  margin-bottom: 25px;
  padding: 0 20px;
}
.weui-msg__title {
  margin-bottom: 5px;
  font-weight: 400;
  font-size: 20px;
}
.weui-msg__desc {
  font-size: 14px;
  color: #999999;
}
.weui-msg__opr-area {
  margin-bottom: 25px;
}
.weui-msg__extra-area {
  margin-bottom: 15px;
  font-size: 14px;
  color: #999999;
}
@media screen and (min-height: 438px) {
  .weui-msg__extra-area {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    text-align: center;
  }
}
.weui-flex {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
}
.weui-flex__item {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
}
.weui-btn {
  margin-top: 15px;
}
.weui-btn:first-child {
  margin-top: 0;
}
.weui-btn-area {
  margin: 1.17647059em 15px 0.3em;
}
.weui-agree {
  display: block;
  padding: .5em 15px;
  font-size: 13px;
}
.weui-agree__text {
  color: #999999;
}
.weui-agree__link {
  display: inline;
  color: #586C94;
}
.weui-agree__checkbox {
  position: absolute;
  left: -9999px;
}
.weui-agree__checkbox-icon {
  position: relative;
  top: 2px;
  display: inline-block;
  border: 1px solid #D1D1D1;
  background-color: #FFFFFF;
  border-radius: 3px;
  width: 11px;
  height: 11px;
}
.weui-agree__checkbox-icon-check {
  position: absolute;
  top: 1px;
  left: 1px;
}
.weui-footer {
  color: #999999;
  font-size: 14px;
  text-align: center;
}
.weui-footer_fixed-bottom {
  position: fixed;
  bottom: .52em;
  left: 0;
  right: 0;
}
.weui-footer__links {
  font-size: 0;
}
.weui-footer__link {
  display: inline-block;
  vertical-align: top;
  margin: 0 .62em;
  position: relative;
  font-size: 14px;
  color: #586C94;
}
.weui-footer__link:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  bottom: 0;
  border-left: 1rpx solid #C7C7C7;
  color: #C7C7C7;
  left: -0.65em;
  top: .36em;
  bottom: .36em;
}
.weui-footer__link:first-child:before {
  display: none;
}
.weui-footer__text {
  padding: 0 .34em;
  font-size: 12px;
}
.weui-grids {
  border-top: 1rpx solid #D9D9D9;
  border-left: 1rpx solid #D9D9D9;
  overflow: hidden;
}
.weui-grid {
  position: relative;
  float: left;
  padding: 20px 10px;
  width: 33.33333333%;
  box-sizing: border-box;
  border-right: 1rpx solid #D9D9D9;
  border-bottom: 1rpx solid #D9D9D9;
}
.weui-grid_active {
  background-color: #ECECEC;
}
.weui-grid__icon {
  display: block;
  width: 28px;
  height: 28px;
  margin: 0 auto;
}
.weui-grid__label {
  margin-top: 5px;
  display: block;
  text-align: center;
  color: #000000;
  font-size: 14px;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.weui-loading {
  margin: 0 5px;
  width: 20px;
  height: 20px;
  display: inline-block;
  vertical-align: middle;
  -webkit-animation: weuiLoading 1s steps(12, end) infinite;
          animation: weuiLoading 1s steps(12, end) infinite;
  background: transparent url(data:image/svg+xml;base64,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) no-repeat;
  background-size: 100%;
}
@-webkit-keyframes weuiLoading {
  0% {
    -webkit-transform: rotate3d(0, 0, 1, 0deg);
            transform: rotate3d(0, 0, 1, 0deg);
  }
  100% {
    -webkit-transform: rotate3d(0, 0, 1, 360deg);
            transform: rotate3d(0, 0, 1, 360deg);
  }
}
@keyframes weuiLoading {
  0% {
    -webkit-transform: rotate3d(0, 0, 1, 0deg);
            transform: rotate3d(0, 0, 1, 0deg);
  }
  100% {
    -webkit-transform: rotate3d(0, 0, 1, 360deg);
            transform: rotate3d(0, 0, 1, 360deg);
  }
}
.weui-badge {
  display: inline-block;
  padding: .15em .4em;
  min-width: 8px;
  border-radius: 18px;
  background-color: #F43530;
  color: #FFFFFF;
  line-height: 1.2;
  text-align: center;
  font-size: 12px;
  vertical-align: middle;
}
.weui-badge_dot {
  padding: .4em;
  min-width: 0;
}
.weui-loadmore {
  width: 65%;
  margin: 1.5em auto;
  line-height: 1.6em;
  font-size: 14px;
  text-align: center;
}
.weui-loadmore__tips {
  display: inline-block;
  vertical-align: middle;
}
.weui-loadmore_line {
  border-top: 1px solid #E5E5E5;
  margin-top: 2.4em;
}
.weui-loadmore__tips_in-line {
  position: relative;
  top: -0.9em;
  padding: 0 .55em;
  background-color: #FFFFFF;
  color: #999999;
}
.weui-loadmore__tips_in-dot {
  position: relative;
  padding: 0 .16em;
  width: 4px;
  height: 1.6em;
}
.weui-loadmore__tips_in-dot:before {
  content: " ";
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -1px;
  margin-left: -2px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #E5E5E5;
}
.weui-panel {
  background-color: #FFFFFF;
  margin-top: 10px;
  position: relative;
  overflow: hidden;
}
.weui-panel:first-child {
  margin-top: 0;
}
.weui-panel:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid #E5E5E5;
  color: #E5E5E5;
}
.weui-panel:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1rpx solid #E5E5E5;
  color: #E5E5E5;
}
.weui-panel__hd {
  padding: 14px 15px 10px;
  color: #999999;
  font-size: 13px;
  position: relative;
}
.weui-panel__hd:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1rpx solid #E5E5E5;
  color: #E5E5E5;
  left: 15px;
}
.weui-media-box {
  padding: 15px;
  position: relative;
}
.weui-media-box:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1rpx solid #E5E5E5;
  color: #E5E5E5;
  left: 15px;
}
.weui-media-box:first-child:before {
  display: none;
}
.weui-media-box__title {
  font-weight: 400;
  font-size: 17px;
  width: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  word-wrap: normal;
  word-wrap: break-word;
  word-break: break-all;
}
.weui-media-box__desc {
  color: #999999;
  font-size: 13px;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.weui-media-box__info {
  margin-top: 15px;
  padding-bottom: 5px;
  font-size: 13px;
  color: #CECECE;
  line-height: 1em;
  list-style: none;
  overflow: hidden;
}
.weui-media-box__info__meta {
  float: left;
  padding-right: 1em;
}
.weui-media-box__info__meta_extra {
  padding-left: 1em;
  border-left: 1px solid #CECECE;
}
.weui-media-box__title_in-text {
  margin-bottom: 8px;
}
.weui-media-box_appmsg {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
          align-items: center;
}
.weui-media-box__thumb {
  width: 100%;
  height: 100%;
  vertical-align: top;
}
.weui-media-box__hd_in-appmsg {
  margin-right: .8em;
  width: 60px;
  height: 60px;
  line-height: 60px;
  text-align: center;
}
.weui-media-box__bd_in-appmsg {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
  min-width: 0;
}
.weui-media-box_small-appmsg {
  padding: 0;
}
.weui-cells_in-small-appmsg {
  margin-top: 0;
}
.weui-cells_in-small-appmsg:before {
  display: none;
}
.weui-progress {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
          align-items: center;
}
.weui-progress__bar {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
}
.weui-progress__opr {
  margin-left: 15px;
  font-size: 0;
}
.weui-navbar {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  position: absolute;
  z-index: 500;
  top: 0;
  width: 100%;
  border-bottom: 1rpx solid #CCCCCC;
}
.weui-navbar__item {
  position: relative;
  display: block;
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
  padding: 13px 0;
  text-align: center;
  font-size: 0;
}
.weui-navbar__item.weui-bar__item_on {
  color: #1AAD19;
}
.weui-navbar__slider {
  position: absolute;
  content: " ";
  left: 0;
  bottom: 0;
  width: 6em;
  height: 3px;
  background-color: #1AAD19;
  -webkit-transition: -webkit-transform .3s;
  transition: -webkit-transform .3s;
  transition: transform .3s;
  transition: transform .3s, -webkit-transform .3s;
}
.weui-navbar__title {
  display: inline-block;
  font-size: 15px;
  max-width: 8em;
  width: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  word-wrap: normal;
}
.weui-tab {
  position: relative;
  height: 100%;
}
.weui-tab__panel {
  box-sizing: border-box;
  height: 100%;
  padding-top: 50px;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}
.weui-search-bar {
  position: relative;
  padding: 8px 10px;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  box-sizing: border-box;
  background-color: #EFEFF4;
  border-top: 1rpx solid #D7D6DC;
  border-bottom: 1rpx solid #D7D6DC;
}
.weui-icon-search {
  margin-right: 8px;
  font-size: inherit;
}
.weui-icon-search_in-box {
  position: absolute;
  left: 10px;
  top: 7px;
}
.weui-search-bar__text {
  display: inline-block;
  font-size: 14px;
  vertical-align: middle;
}
.weui-search-bar__form {
  position: relative;
  -webkit-box-flex: 1;
  -webkit-flex: auto;
          flex: auto;
  border-radius: 5px;
  background: #FFFFFF;
  border: 1rpx solid #E6E6EA;
}
.weui-search-bar__box {
  position: relative;
  padding-left: 30px;
  padding-right: 30px;
  width: 100%;
  box-sizing: border-box;
  z-index: 1;
}
.weui-search-bar__input {
  height: 28px;
  line-height: 28px;
  font-size: 14px;
}
.weui-icon-clear {
  position: absolute;
  top: 0;
  right: 0;
  padding: 7px 8px;
  font-size: 0;
}
.weui-search-bar__label {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  border-radius: 3px;
  text-align: center;
  color: #9B9B9B;
  background: #FFFFFF;
  line-height: 28px;
}
.weui-search-bar__cancel-btn {
  margin-left: 10px;
  line-height: 28px;
  color: #09BB07;
  white-space: nowrap;
}

然后看效果

图1：

图2：

文档给的都是死数据然而我们都是要获取到数据库中的数据所以我们来改下 

首先在onload中查一下后台数据库中的数据：

card.js

// ca.js
Page({
  
  /**
   * 页面的初始数据
   */
  data: {
    image1:'../image/01.jpg',
    image2: '../image/02.jpg',
    image3: '../image/user-unlogin.png',
    datalist:[],
    index: 0,
    dropDownMenuTitle: ['-----------请选择-----------'],
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    var that = this;
    wx.request({
      url: '你后台查询数据的方法...............',
      data: {
      },
      method: 'POST',
      header: {
        'content-type': 'application/x-www-form-urlencoded;charset=utf-8'
      },
      success: function (res) {
        console.log(res.data);
        console.log(res.data.obj[1].ckey);
        that.setData({
          dataList: res.data.obj
        })
      },
      fail: function (res) {
        console.log("--------fail--------");
      }

    })
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },
  bindPickerChange: function (e) {
    console.log('picker发送选择改变，携带值为', e.detail.value)
    this.setData({
      index: e.detail.value
    })
  },
  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },
  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  },
  popSelect1:function(){
    var that = this;
    wx.showActionSheet({
      itemList: [' 拍摄', '从相册选择'],
      success: function (res) {
        if (res.tapIndex == 0) {
          //  wx.navigateTo({
          //    url: '/pages/index/index'
          //  })
          wx.chooseImage({
            count: 1,
            sizeType: ['original', 'compressed'],
            sourceType: ['camera'],
            success(res) {
              // tempFilePath可以作为img标签的src属性显示图片
              var tempFilePaths = res.tempFilePaths;
              that.setData({
                image1: tempFilePaths
              })
            }
          })
        } else {
          //  wx.navigateTo({
          //    url: '/pages/index/kiaa',
          //  })
          wx.chooseImage({
            count: 1,
            sizeType: ['original', 'compressed'],
            sourceType: ['album'],
            success(res) {
              // tempFilePath可以作为img标签的src属性显示图片
              var tempFilePaths = res.tempFilePaths;
              that.setData({
                image1: tempFilePaths
              })
            }
          })
        }
      }
    })
  },
  popSelect2: function () {
    var that = this;
    wx.showActionSheet({
      itemList: [' 拍摄', '从相册选择'],
      success: function (res) {
        if (res.tapIndex == 0) {
          //  wx.navigateTo({
          //    url: '/pages/index/index'
          //  })
          wx.chooseImage({
            count: 1,
            sizeType: ['original', 'compressed'],
            sourceType: ['camera'],
            success(res) {
              // tempFilePath可以作为img标签的src属性显示图片
              var tempFilePaths = res.tempFilePaths;
              that.setData({
                image2: tempFilePaths
              })
            }
          })
        } else {
          //  wx.navigateTo({
          //    url: '/pages/index/kiaa',
          //  })
          wx.chooseImage({
            count: 1,
            sizeType: ['original', 'compressed'],
            sourceType: ['album'],
            success(res) {
              // tempFilePath可以作为img标签的src属性显示图片
              var tempFilePaths = res.tempFilePaths;
              that.setData({
                image2: tempFilePaths
              })
            }
          })
        }
      }
    })
  },
  popSelect3: function () {
    var that = this;
    wx.showActionSheet({
      itemList: [' 拍摄', '从相册选择'],
      success: function (res) {
        if (res.tapIndex == 0) {
          //  wx.navigateTo({
          //    url: '/pages/index/index'
          //  })
          wx.chooseImage({
            count: 1,
            sizeType: ['original', 'compressed'],
            sourceType: ['camera'],
            success(res) {
              // tempFilePath可以作为img标签的src属性显示图片
              var tempFilePaths = res.tempFilePaths;
              that.setData({
                image3: tempFilePaths
              })
            }
          })
        } else {
          //  wx.navigateTo({
          //    url: '/pages/index/kiaa',
          //  })
          wx.chooseImage({
            count: 1,
            sizeType: ['original', 'compressed'],
            sourceType: ['album'],
            success(res) {
              // tempFilePath可以作为img标签的src属性显示图片
              var tempFilePaths = res.tempFilePaths;
              that.setData({
                image3: tempFilePaths
              })
            }
          })
        }
      }
    })
  },
})

查询出来的数据存到了data中接下来就是前台显示了

card.wxml

<view class="cardImg" id="ImgDiv1">
<h5 class="title-h1">上传身份证正面人脸照</h5>
<image wx:if='{{image1}}' class="img1" src="{{image1}}" id="Img1"></image>
  <input class="ui-btn1" type="button" bindtap="popSelect1" onclick="upfileImg(1)" id="Img1" value="本人身份证正面上传 " />
</view>
<view class="cardImg" id="ImgDiv2">
<h5 class="title-h1">上传身份证反面国徽照</h5>
<image wx:if='{{image2}}' class="img1" src="{{image2}}" id="Img2"></image>
  <input class="ui-btn1" type="button" bindtap="popSelect2" onclick="upfileImg(2)" id="Img2" value="本人身份证背面上传 " />
</view>
<view class="cardImg" id="ImgDiv3">
<h5 class="title-h1">上传本人相片</h5>
<image wx:if='{{image3}}' class="img2" id="Img3" src="{{image3}}"></image>
  <input class="ui-btn1" type="button" bindtap="popSelect3" onclick="upfileImg(3)" id="Img2" value="本人头像拍照上传" />
</view>


<view class="cardBox-bd idCard-box">
  <span class="cardBox-kd1">姓名</span>
  <input class="weui-input" placeholder="联系人的名字" />
</view>
<view class="cardBox-bd idCard-box">
  <span class="cardBox-kd1">联系电话</span>
  <input class="weui-input" placeholder="联系人的电话" />
</view>
<view class="cardBox-bd idCard-box">
  <span class="cardBox-kd1">关系</span>

  <picker bindchange="bindPickerChange" value="{{dataList[index].cvalue}}" range="{{dataList}}" range-key="{{'ckey'}}">
    <view class="picker">
      <input class='selectInp' placeholder='请选择关系' name='casArry' disabled='false' value='{{dataList[index].ckey}}'/>
    </view>
  </picker>
  
</view>
<view style="text-align: center;">
  <a id="submitBtn" class="ui-btn" style="left:100px;" onclick="save();"> 确 定 </a>
</view>

请注意picker标签中的value、range、range-key属性

value： 也就是我们查出来的数据的json数组的下标（此处一定要注意不是跟文档一样写个index就可以必须把数据库中查出来的id或者别的代表下标的字段）

range:是我们查出来的数据的json数组名字

range-key:就是我们查出来想显示的字段

例如：我想显示查出来的数据中的name的值得话我就得在range-key中写{{'name'}}其中必须是单引号里面字段名字

否则就会出现object数据显示不正常问题

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