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utils/system-info-helper.js

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+/**
+ * 系统信息工具类
+ * 使用新API替换废弃的wx.getSystemInfoSync
+ */
+
+class SystemInfoHelper {
+  constructor() {
+    this.cachedInfo = null;
+    this.cacheTime = 0;
+    this.cacheExpiry = 5 * 60 * 1000; // 5分钟缓存
+  }
+
+  /**
+   * 获取完整的系统信息（新API版本）
+   */
+  async getSystemInfo() {
+    // 检查缓存
+    if (this.cachedInfo && (Date.now() - this.cacheTime) < this.cacheExpiry) {
+      return this.cachedInfo;
+    }
+
+    try {
+      // 并行获取各种系统信息
+      const [windowInfo, deviceInfo, appBaseInfo] = await Promise.all([
+        this.getWindowInfo(),
+        this.getDeviceInfo(),
+        this.getAppBaseInfo()
+      ]);
+
+      // 🔥 合并所有信息 - 使用Object.assign替代扩展运算符，避免Babel依赖问题
+      const systemInfo = Object.assign({}, windowInfo, deviceInfo, appBaseInfo, {
+        // 保持向后兼容的字段名
+        windowHeight: windowInfo.windowHeight,
+        windowWidth: windowInfo.windowWidth,
+        statusBarHeight: windowInfo.statusBarHeight,
+        safeArea: windowInfo.safeArea,
+        platform: deviceInfo.platform,
+        system: deviceInfo.system,
+        model: deviceInfo.model,
+        brand: deviceInfo.brand,
+        version: appBaseInfo.version,
+        SDKVersion: appBaseInfo.SDKVersion,
+        language: appBaseInfo.language,
+        theme: appBaseInfo.theme
+      });
+
+      // 缓存结果
+      this.cachedInfo = systemInfo;
+      this.cacheTime = Date.now();
+
+      return systemInfo;
+    } catch (error) {
+      console.warn('获取系统信息失败，使用兜底方案:', error);
+      return this.getFallbackSystemInfo();
+    }
+  }
+
+  /**
+   * 同步获取系统信息（用于替换wx.getSystemInfoSync）
+   */
+  getSystemInfoSync() {
+    // 如果有缓存，直接返回
+    if (this.cachedInfo && (Date.now() - this.cacheTime) < this.cacheExpiry) {
+      return this.cachedInfo;
+    }
+
+    try {
+      // 尝试使用新的同步API
+      const windowInfo = wx.getWindowInfo();
+      const deviceInfo = wx.getDeviceInfo();
+      const appBaseInfo = wx.getAppBaseInfo();
+
+      const systemInfo = {
+        ...windowInfo,
+        ...deviceInfo,
+        ...appBaseInfo,
+        // 保持向后兼容
+        windowHeight: windowInfo.windowHeight,
+        windowWidth: windowInfo.windowWidth,
+        statusBarHeight: windowInfo.statusBarHeight,
+        safeArea: windowInfo.safeArea,
+        platform: deviceInfo.platform,
+        system: deviceInfo.system,
+        model: deviceInfo.model,
+        brand: deviceInfo.brand,
+        version: appBaseInfo.version,
+        SDKVersion: appBaseInfo.SDKVersion,
+        language: appBaseInfo.language,
+        theme: appBaseInfo.theme
+      };
+
+      // 缓存结果
+      this.cachedInfo = systemInfo;
+      this.cacheTime = Date.now();
+
+      return systemInfo;
+    } catch (error) {
+      console.warn('新API获取系统信息失败，使用兜底方案:', error);
+      return this.getFallbackSystemInfo();
+    }
+  }
+
+  /**
+   * 获取窗口信息
+   */
+  getWindowInfo() {
+    return new Promise((resolve) => {
+      try {
+        const windowInfo = wx.getWindowInfo();
+        resolve(windowInfo);
+      } catch (error) {
+        console.warn('获取窗口信息失败:', error);
+        resolve({
+          windowHeight: 667,
+          windowWidth: 375,
+          statusBarHeight: 44,
+          safeArea: { top: 44, bottom: 667 }
+        });
+      }
+    });
+  }
+
+  /**
+   * 获取设备信息
+   */
+  getDeviceInfo() {
+    return new Promise((resolve) => {
+      try {
+        const deviceInfo = wx.getDeviceInfo();
+        resolve(deviceInfo);
+      } catch (error) {
+        console.warn('获取设备信息失败:', error);
+        resolve({
+          platform: 'unknown',
+          system: 'unknown',
+          model: 'unknown',
+          brand: 'unknown',
+          benchmarkLevel: 1
+        });
+      }
+    });
+  }
+
+  /**
+   * 获取应用基础信息
+   */
+  getAppBaseInfo() {
+    return new Promise((resolve) => {
+      try {
+        const appBaseInfo = wx.getAppBaseInfo();
+        resolve(appBaseInfo);
+      } catch (error) {
+        console.warn('获取应用信息失败:', error);
+        resolve({
+          version: '1.0.0',
+          SDKVersion: '2.0.0',
+          language: 'zh_CN',
+          theme: 'light'
+        });
+      }
+    });
+  }
+
+  /**
+   * 兜底系统信息
+   */
+  getFallbackSystemInfo() {
+    try {
+      // 最后的兜底方案：使用旧API
+      return wx.getSystemInfoSync();
+    } catch (error) {
+      console.error('所有获取系统信息的方法都失败了:', error);
+      // 返回默认值
+      return {
+        windowHeight: 667,
+        windowWidth: 375,
+        statusBarHeight: 44,
+        safeArea: { top: 44, bottom: 667 },
+        platform: 'unknown',
+        system: 'unknown',
+        model: 'unknown',
+        brand: 'unknown',
+        version: '1.0.0',
+        SDKVersion: '2.0.0',
+        language: 'zh_CN',
+        theme: 'light'
+      };
+    }
+  }
+
+  /**
+   * 清除缓存
+   */
+  clearCache() {
+    this.cachedInfo = null;
+    this.cacheTime = 0;
+  }
+
+  /**
+   * 获取菜单按钮信息
+   */
+  getMenuButtonBoundingClientRect() {
+    try {
+      return wx.getMenuButtonBoundingClientRect();
+    } catch (error) {
+      console.warn('获取菜单按钮信息失败:', error);
+      return {
+        width: 87,
+        height: 32,
+        top: 48,
+        right: 365,
+        bottom: 80,
+        left: 278
+      };
+    }
+  }
+
+  /**
+   * 计算导航栏高度
+   */
+  getNavBarHeight(systemInfo) {
+    try {
+      const menuButton = this.getMenuButtonBoundingClientRect();
+      const statusBarHeight = systemInfo.statusBarHeight || 44;
+
+      // 导航栏高度 = 状态栏高度 + 胶囊按钮高度 + 额外间距
+      const navBarHeight = statusBarHeight + menuButton.height +
+                          (menuButton.top - statusBarHeight) * 2;
+
+      return navBarHeight;
+    } catch (error) {
+      console.warn('计算导航栏高度失败:', error);
+      return 88; // 默认导航栏高度
+    }
+  }
+}
+
+// 创建全局实例
+const systemInfoHelper = new SystemInfoHelper();
+
+module.exports = {
+  SystemInfoHelper,
+  systemInfoHelper,
+  // 向后兼容的函数
+  getSystemInfo: () => systemInfoHelper.getSystemInfo(),
+  getSystemInfoSync: () => systemInfoHelper.getSystemInfoSync()
+};