基本完成

lib/data/local/storage.dart

@@ -0,0 +1,48 @@
+import 'dart:convert';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+class Storage {
+  //存储数据
+  static Future<void> set(String key, dynamic value) async {
+    SharedPreferences sp = await SharedPreferences.getInstance();
+    if (value is String) {
+      sp.setString(key, value);
+    } else if (value is int) {
+      sp.setInt(key, value);
+    } else if (value is bool) {
+      sp.setBool(key, value);
+    } else if (value is double) {
+      sp.setDouble(key, value);
+    } else if (value is Map) {
+      String jsonStr = jsonEncode(value);
+      sp.setString(key, jsonStr);
+    }
+  }
+
+  //获取数据
+  static Future<dynamic> get(String key) async {
+    SharedPreferences sp = await SharedPreferences.getInstance();
+    var value = sp.get(key);
+    if (value is String) {
+      try {
+        return jsonDecode(value);
+      } catch (e) {
+        return value;
+      }
+    }
+    return value;
+  }
+
+  //删除数据
+  static Future<void> remove(key) async {
+    SharedPreferences sp = await SharedPreferences.getInstance();
+    sp.remove(key);
+  }
+
+  //判断键是否存在
+  static Future<bool> hasKey(String key) async {
+    SharedPreferences sp = await SharedPreferences.getInstance();
+    return sp.containsKey(key);
+  }
+}