功能：代码优化

src/components/select-map/index.tsx

@@ -73,6 +73,9 @@ const SelectMapModal: FC<propType> = (props) => {
   // componentDidMount
   useEffect(() => {
     if (!open) return;
+    return () => {
+      setPosition(undefined);
+    };
   }, [open]);
   return (
     <Modal open={open} title={title} onCancel={handleCancel} onOk={handleOk} destroyOnClose>