fix: 文件丢失补充

src/components/NiceForm/utils/keepAlive.ts

+import { get, set, remove } from './session';
+
+const STATE_KEY = 'currentState';
+
+export interface currentStateType {
+  pathname: string;
+  current: number;
+  pageSize: number;
+  queryParams: any;
+}
+
+/**
+ * 保存表格状态
+ * @param current
+ * @param pageSize
+ */
+export const saveCurrentState = (
+  current: number,
+  pageSize: number,
+  queryParams?: any,
+) => {
+  let currentPage = get(STATE_KEY);
+  set(
+    STATE_KEY,
+    Object.assign(currentPage ? currentPage : {}, {
+      pathname: window.location.pathname,
+      current,
+      pageSize,
+      queryParams,
+    }),
+  );
+};
+
+/**
+ * 获取表格状态数据
+ */
+export const getCurrentState = () => {
+  return get(STATE_KEY);
+};
+
+/**
+ * 清除表格状态数据
+ */
+export const clearCurrentState = () => {
+  return remove(STATE_KEY);
+};

src/components/NiceForm/utils/session.ts

+export const get = key => {
+  let result;
+  result = sessionStorage.getItem(key);
+  if (result) {
+    if (isJSON(result)) {
+      result = JSON.parse(result);
+    }
+    return result;
+  }
+
+  return undefined;
+};
+
+export const set = (key, value) => {
+  if (typeof value === 'object') {
+    value = JSON.stringify(value);
+  }
+  sessionStorage.setItem(key, value);
+};
+
+export const remove = key => {
+  sessionStorage.removeItem(key);
+};
+
+const isJSON = str => {
+  if (typeof str === 'string') {
+    try {
+      var obj = JSON.parse(str);
+      if (typeof obj === 'object' && obj) {
+        return true;
+      } else {
+        return false;
+      }
+    } catch (e) {
+      return false;
+    }
+  }
+};