【微信小程序】【Demo】Picker模糊查询组件

Component({
  options: {
    // 在组件定义时的选项中启用多slot支持
    multipleSlots: true
  },
  /**
   * 组件的属性列表
   */
  properties: {
    // 父组件传递过来的数据列表
    items: {
      type: Array,
      value: []
    },
    // 数据列表的key名
    keyName: {
      type: String,
      value: "value"
    },
    // 当前已选中项
    initValue: {
      type: String,
      value: ''
    },
  },
  /**
   * 组件的初始数据
   */
  data: {
    //控制picker的显示与隐藏
    flag: true,
    // 用户输入的关键词
    searchValue:'',
    // 滚动选择的
    setValues: [],
    // 滚动选择的索引
    selectIndex:'',

    //父组件的模糊查询列表方法，通过js设置。
    parentSearchItemList:null,
    //确认选择事件
    pickerSelectConfirm:null,

  },
  /**
   * 组件的方法列表
   */
  methods: {
  /**
  * @name: 搜索，输入框输入事件触发
  */
  searchList(e){
    if(this.data.parentSearchItemList!=null){
      try {
        this.data.parentSearchItemList(e.detail);
      } catch (error) {
      }
    }
    // let self = this;
    // self.triggerEvent('searchList', e.detail);
  },
  /**
  * @name: 隐藏picker
  */
  hiddeDatePicker(){
    let self = this;
    self.setData({
      flag: !self.data.flag
    })
  },
  /**
  * @name: 展示picker
  */
  showDatePicker(){
    let self = this;
    self.setData({
      flag: !self.data.flag
    })
    self.getItems()
  },
  /**
  * @name: 选择好后，点击确定
  */
  confirm(){
    let self = this;
    // 获取用户选择的
    let item = self.data.items[self.data.selectIndex]?self.data.items[self.data.selectIndex]:self.data.items[0];
    if(this.data.pickerSelectConfirm!=null){
      try {
        this.data.pickerSelectConfirm(item,self.data.selectIndex);
      } catch (error) {
      }
    }
    // // 通过发送自定义事件把用户选择的传递到父组件
    // self.triggerEvent('confirm', item);
  },
  /**
  * @name: 用户滚动picker时，获取滚动选择的索引
  */
  bindChange(e){
    let self = this;
    self.setData({
      // 用户选择的索引
      selectIndex:e.detail.value[0]
    })
  },
  /**
   * @name: 获取初始化信息
   */
  getItems(e){
    let self = this;
    if (self.data.items.length && self.data.initValue) {
      let items = self.data.items
      for (let i = 0; i < items.length; i++) {
        if (self.data.initValue == items[self.data.keyName]) {
          self.setData({
            setValues: [i]
          })
          return
        }
      }
    }
    self.setData({
      setValues: [0]
    })
  },
},
})

<view class="date-background" hidden="{{flag}}">
  <view class='date-gray-background' bindtap='hiddeDatePicker'></view>
  <view class='date-container'>
    <view class="transparent">
      <view class='date-confirm'>
        <view bindtap='hiddeDatePicker'>取消</view>
        
        <input value="{{searchValue}}"
          input-align="center"
          placeholder="请输入关键词"
          bindinput ="searchList"
          />
        <view bindtap='confirm'>确定</view>
      </view>
      <picker-view
        indicator-class="indicator"
        value="{{setValues}}"
        bindchange="bindChange"
        bindpickend="_bindpickend"
        indicator-style="height: 100rpx;"
        mask-style="height:900rpx;"
        style="width: 100%; height: 90%;position:absolute;bottom:0rpx;text-align:center;background:white"
      >
        <picker-view-column class="pickViewColumn">
          <view wx:for="{{items}}" wx:key="{{keyName}}" style="line-height: 104rpx">{{item[keyName]}}</view>
        </picker-view-column>
      </picker-view>
    </view>
  </view>
</view>

.date-background {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}
.date-gray-background {
  position: absolute;
  width: 100%;
  top: 0;
  background: rgba(0, 0, 0, .5);
  height: calc(100% - 500rpx);
}
.date-container {
  position: absolute;
  width: 100%;
  height: 900rpx;
  overflow: hidden;
  background: #fff;
  bottom:0;
  z-index: 1000;
}

.date-confirm {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding:0 20rpx;
  font-size:34rpx;
  line-height: 70rpx;
  color:var(--ThemeColor)
}
.pickViewColumn{
  height: 900rpx;
  margin-top: -300rpx;
}
.indicator{
height: 80rpx;
border: 1rpx solid #E5E8E8;
}

{
  "component": true
}

      <view  class="t-cell tip " bindtap="showPickerSelect1">
        {{productClassList[classIndex].ClassName}}
        <image class="right-image" mode="aspectFit" src='{{ImgDomain}}/images/icon/right.png'></image>
      </view> 


<pickerselect id="pickerselect1" items="{{productClassList}}" keyName="ClassName" initValue="{{productClassList[classIndex].ClassName}}"></pickerselect>

  //显示picker查询组件
  showPickerSelect1(){
    let self = this;
    self.pickerselect1.showDatePicker()
  },
  hidePickerSelect1(){
    let self = this;
    self.pickerselect1.hiddeDatePicker()
  },
  parentSearchItemList(detail){
    //模糊查询picker的列表
    this.data.searchClassName=detail.value;
    this.getProductClassList(this.data.strainClassId);
  },
  pickerSelectConfirm(item,index){
    // this.bindClassChange({detail:{value:index}});
    this.setData({
      classIndex: index,
      classValue: [index]
    })
    this.pickerselect1.hiddeDatePicker()
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function(options) {
    
    let self = this;
    // 初始化自定义picker实例
    self.pickerselect1 = self.selectComponent("#pickerselect1");
    self.pickerselect1.setData({
      //模糊查询输入关键词事件
      parentSearchItemList:this.parentSearchItemList,
      //确认选择事件(e=item)
      pickerSelectConfirm:this.pickerSelectConfirm,
    });

  },