select

src/components/SelectButton/BuildSelect.jsx

@@ -44,7 +44,7 @@ const BuildingSelect = (props) => {
   }
 
   return (
-      <Select value={value} style={{ width: '180px' }} placeholder="请选择项目" onChange={handleChange}>
+      <Select value={'' === value ? undefined : value} style={{ width: '180px' }} placeholder="请选择项目" onChange={handleChange}>
           {data.map(building => (
             <Option key={building.buildingId}>{building.buildingName}</Option>
           ))}