feat:增加博客卡片内容

lib/utils/sp_utils.dart

@@ -0,0 +1,61 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class SPUtil {
+  static late SharedPreferences _prefs;
+
+  /// 初始化
+  static Future<void> init() async {
+    _prefs = await SharedPreferences.getInstance();
+  }
+
+  /// 存储数据
+  static Future<bool> set(String key, dynamic value) {
+    if (value is String) return _prefs.setString(key, value);
+    if (value is int) return _prefs.setInt(key, value);
+    if (value is bool) return _prefs.setBool(key, value);
+    if (value is double) return _prefs.setDouble(key, value);
+    if (value is List<String>) return _prefs.setStringList(key, value);
+    throw ArgumentError('Unsupported value type: ${value.runtimeType}');
+  }
+
+  /// 获取数据
+  static dynamic get(String key, [dynamic defaultValue]) {
+    if (!_prefs.containsKey(key)) return defaultValue;
+    return _prefs.get(key) ?? defaultValue;
+  }
+
+  /// 获取字符串
+  static String getString(String key, [String defaultValue = '']) {
+    return _prefs.getString(key) ?? defaultValue;
+  }
+
+  /// 获取布尔值
+  static bool getBool(String key, [bool defaultValue = false]) {
+    return _prefs.getBool(key) ?? defaultValue;
+  }
+
+  /// 获取整数
+  static int getInt(String key, [int defaultValue = 0]) {
+    return _prefs.getInt(key) ?? defaultValue;
+  }
+
+  /// 获取浮点数
+  static double getDouble(String key, [double defaultValue = 0.0]) {
+    return _prefs.getDouble(key) ?? defaultValue;
+  }
+
+  /// 获取字符串列表
+  static List<String> getStringList(String key, [List<String> defaultValue = const []]) {
+    return _prefs.getStringList(key) ?? defaultValue;
+  }
+
+  /// 删除数据
+  static Future<bool> remove(String key) {
+    return _prefs.remove(key);
+  }
+
+  /// 清空所有数据
+  static Future<bool> clear() {
+    return _prefs.clear();
+  }
+}