微信小程序省市区级联选择

# 原生小程序官方插件没有提供自定义数据的级联插件

# wxml文件

<view class="area-picker">
  <picker mode="multiSelector" bindcancel="cancelArea" bindchange="onPickerChange" bindcolumnchange="onColumnChange" value="{{pickerIndex}}" range="{{pickerData}}">
    <view class="serach_view-right">
      <text class="ellipsis"> {{selectedArea || '请选择地区'}}</text>
      <image src=""></image>
    </view>
  </picker>
</view>

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# js文件


Component({
  properties: {
    areaData:{
      type: Array,
      value: []
    }
    // 可以添加自定义属性
  },

  data: {
    pickerData: [[], [], []],
    pickerIndex: [0, 0, 0],
    selectedArea: '',
    provinces: [],
    cities: [],
    districts: [],
  },

  lifetimes: {
    attached() {
    },
  },

  methods: {
    initAreaData() {
      const provinces = this.properties.areaData.map(province => ({
        code: province.code,
        name: province.name,
      }));

      this.setData({
        provinces,
        pickerData: [
          provinces.map(p => p.name),
          [],
          [],
        ],
      });

      this.updateCities(0);
      this.updateDistricts(0);
    },

    updateCities(provinceIndex) {
      const cities = this.properties.areaData[provinceIndex].children.map(city => ({
        code: city.code,
        name: city.name,
      }));

      this.setData({
        cities,
        'pickerData[1]': cities.map(c => c.name),
      });
    },

    updateDistricts(cityIndex) {
      const { pickerIndex } = this.data;
      const districts = this.properties.areaData[pickerIndex[0]].children[cityIndex].children.map(district => ({
        code: district.code,
        name: district.name,
      }));

      this.setData({
        districts,
        'pickerData[2]': districts.map(d => d.name),
      });
    },

    onColumnChange(e) {
      const { column, value } = e.detail;
      const { pickerIndex } = this.data;

      pickerIndex[column] = value;

      if (column === 0) {
        this.updateCities(value);
        this.updateDistricts(0);
        pickerIndex[1] = 0;
        pickerIndex[2] = 0;
      } else if (column === 1) {
        this.updateDistricts(value);
        pickerIndex[2] = 0;
      }

      this.setData({ pickerIndex });
    },
    cancelArea() {
      this.setData({ selectedArea:'' });
      this.triggerEvent('areachange', {
        province: {
          code:'',
          name:''
        },
        city: {
          code:'',
          name:''
        },
        district: {
          code:'',
          name:''
        },
      });
    },
    onPickerChange(e) {
      const { value } = e.detail;
      const { provinces, cities, districts } = this.data;

      const selectedArea = `${districts[value[2]].name}`;

      this.setData({ selectedArea });
      this.triggerEvent('areachange', {
        province: provinces[value[0]],
        city: cities[value[1]],
        district: districts[value[2]],
      });
    },
  },
});

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# css文件

.serach_view-right {
  font-family: Alibaba PuHuiTi-Bold;
  font-weight: bold;
  font-size: 32rpx;
  color: #26293C;
  line-height: 40rpx;
  display: flex;
  align-items: center;
  padding-right: 40rpx;
  padding-top: 24rpx;
  padding-bottom: 24rpx;
}

.serach_view-right image {
  width: 28rpx;
  height: 28rpx;
  margin-left: 10rpx;
}

.serach_view-right text {
  display: inline-block;
  width: 160rpx;
  text-align: right;
}
.ellipsis {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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上次更新: 2024/08/17, 20:43:29

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