引入用户首选项用于存储用户最高得分

README.md

@@ -1,8 +1,8 @@
-# HarmonyOS
+# HarmonyOS 游戏开发
 
 ## About
 基于[华为鸿蒙](https://developer.huawei.com/consumer/cn/sdk) HarmonyOS SDK ，ArkTS 开发的小游戏，学习鸿蒙开发。
-
+鸿蒙Next应用 、 鸿蒙4.0开发 
 ## Install
 
 1. 请[安装最新版DevEco Studio](https://developer.huawei.com/consumer/cn/download/)。

features/number/src/main/ets/numberability/NumberAbility.ets

@@ -4,38 +4,39 @@ import { window } from '@kit.ArkUI';
 
 export default class NumberAbility extends UIAbility {
   onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
-    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
+    hilog.info(0x0000, 'numberTag', '%{public}s', 'Ability onCreate');
+
   }
 
   onDestroy(): void {
-    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onDestroy');
+    hilog.info(0x0000, 'numberTag', '%{public}s', 'Ability onDestroy');
   }
 
   onWindowStageCreate(windowStage: window.WindowStage): void {
     // Main window is created, set main page for this ability
-    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
+    hilog.info(0x0000, 'numberTag', '%{public}s', 'Ability onWindowStageCreate');
 
     windowStage.loadContent('pages/Index', (err) => {
       if (err.code) {
-        hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
+        hilog.error(0x0000, 'numberTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? '');
         return;
       }
-      hilog.info(0x0000, 'testTag', 'Succeeded in loading the content.');
+      hilog.info(0x0000, 'numberTag', 'Succeeded in loading the content.');
     });
   }
 
   onWindowStageDestroy(): void {
     // Main window is destroyed, release UI related resources
-    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
+    hilog.info(0x0000, 'numberTag', '%{public}s', 'Ability onWindowStageDestroy');
   }
 
   onForeground(): void {
     // Ability has brought to foreground
-    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onForeground');
+    hilog.info(0x0000, 'numberTag', '%{public}s', 'Ability onForeground');
   }
 
   onBackground(): void {
     // Ability has back to background
-    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onBackground');
+    hilog.info(0x0000, 'numberTag', '%{public}s', 'Ability onBackground');
   }
 }

features/number/src/main/ets/services/PreferencesUtil.ets

@@ -0,0 +1,65 @@
+// 导入preferences模块。
+import dataPreferences from '@ohos.data.preferences';
+import { BusinessError } from '@kit.BasicServicesKit';
+
+let context = getContext(this);
+const PREFERENCES_NAME = 'fruit.db';
+
+export default class PreferencesUtil {
+  private preferences: dataPreferences.Preferences | undefined = undefined;
+
+  // 调用getPreferences方法读取指定首选项持久化文件，
+  // 将数据加载到Preferences实例，用于数据操作
+  async getPreferencesFromStorage() {
+    console.log('context', context);
+    await dataPreferences.getPreferences(context, PREFERENCES_NAME).then((data) => {
+      this.preferences = data;
+      console.info(`Succeeded in getting preferences`);
+    }).catch((err: BusinessError) => {
+      console.error(`Failed to get preferences, Cause:` + err.message + ' ' + err.code);
+    });
+  }
+
+  // 将用户输入的数据，保存到缓存的Preference实例中
+  async putPreference(key: string, data: string) {
+    if (this.preferences === null) {
+      await this.getPreferencesFromStorage();
+    }
+
+    await this.preferences?.put(key, data).then(() => {
+      console.info(`Succeeded in putting value`);
+    }).catch((err: BusinessError) => {
+      console.error(`Failed to get preferences, Cause:` + err);
+    });
+
+    // 将Preference实例存储到首选项持久化文件中
+    await this.preferences?.flush();
+  }
+
+  // 使用Preferences的get方法读取数据
+  async getPreference(key: string) {
+    let result: dataPreferences.ValueType = '';
+    if (this.preferences === null) {
+      await this.getPreferencesFromStorage();
+    }
+    await this.preferences?.get(key, '').then((data) => {
+      result = data;
+      console.info(`Succeeded in getting value`);
+    }).catch((err: BusinessError) => {
+      console.error(`Failed to get preferences, Cause:` + err);
+    });
+
+    return result;
+  }
+
+  // 从内存中移除指定文件对应的Preferences单实例。
+  // 移除Preferences单实例时，应用不允许再使用该实例进行数据操作，否则会出现数据一致性问题。
+  async deletePreferences() {
+    await dataPreferences.deletePreferences(context, PREFERENCES_NAME).then(() => {
+      console.info(`Succeeded in delete preferences`);
+    }).catch((err: BusinessError) => {
+      console.error(`Failed to get preferences, Cause:` + err);
+    });
+    this.preferences = undefined;
+  }
+}

features/number/src/main/ets/views/NumberGameComp.ets

@@ -1,12 +1,13 @@
 import { HdNav } from '@mygames/basic'
 import { Board, Tile } from '../services/helper'
 import { HashMap } from '@kit.ArkTS'; // 导入HashMap模块
+import PreferencesUtil from '../services/PreferencesUtil';
 
 interface InfoBuilderParams {
   info: string | Resource
   text: string
 }
-
+const PREFERENCES_KEY = 'number_best_score';
 @Component
 export struct NumberGameComp {
   @State won: boolean = false;
@@ -21,7 +22,7 @@ export struct NumberGameComp {
   @State lastScreenX: number = 0
   @State lastScreenY: number = 0
   @State imageHashMap: HashMap<string, Resource> = new HashMap();
-
+  private preferencesUtil = new PreferencesUtil();
   build() {
     Column({ space: 16 }) {
       HdNav({ title: '2048', showRightIcon: false })
@@ -79,11 +80,18 @@ export struct NumberGameComp {
     .borderRadius(7)
   }
 
-  aboutToAppear() {
+  async aboutToAppear() {
     console.log("aboutToAppear")
     this.initImageHashMap()
     this.boardCellsArray = this.board.cells;
     console.log(JSON.stringify(this.boardCellsArray))
+    // 初始化首选项
+    await this.preferencesUtil.getPreferencesFromStorage();
+
+    // 获取最佳得分
+    this.preferencesUtil.getPreference(PREFERENCES_KEY).then(resultData => {
+      console.log('PREFERENCES_KEY', resultData)
+    });
   }
 
   reset() {