health.applet/miniprogram/module/user/components/field-picker/field-picker.ts

// module/user/components/field-picker/field-picker.ts
Component({
  behaviors: ['wx://form-field'],
  lifetimes: {},
  properties: {
    title: { type: String, value: '' },
    options: { type: Array, value: [] },
    optionsColumns: { type: Number, value: 3 },
    itemHeight: { type: Number, value: 64 },
    multiple: { type: Boolean, value: true },
    closeOnOverlayClick: { type: Boolean, value: true },
  },
  data: {
    visible: false,
    value: [],
    selected: [] as Option[],
  },
  observers: {
    'value, options'(values: Option[] | Option | string, options: Option[]) {
      const selected = new Set<Option>();
      if (options.length) {
        const _values = Array.isArray(values) ? values : values ? [values] : [];
        for (const item of _values) {
          const value = typeof item === 'object' ? item?.value : item;
          const option = options.find(item => item.value === value)
          if (option) selected.add(option);
        }
      }
      this.setData({ selected: [...selected] });
    },
  },
  methods: {
    onShow() {
      this.setData({ visible: true });
    },
    onPickerConfirm(event: any) {
      const { options } = event.detail;
      this.setData({ value: options })
    },
    onPickerClose() {
      this.setData({ visible: false })
    }
  }
})