feat: add QRCode scanner

src/composables/useQRScanner.ts

@@ -0,0 +1,82 @@
+import { BarcodeScanner } from "@capacitor-community/barcode-scanner";
+import { Capacitor } from "@capacitor/core";
+
+export interface QRScanResult {
+  text: string;
+  format: string;
+}
+
+export function useQRScanner() {
+  const isSupported = Capacitor.isNativePlatform();
+
+  // 检查权限
+  const checkPermission = async (): Promise<boolean> => {
+    try {
+      const status = await BarcodeScanner.checkPermission({ force: true });
+      return status.granted || false;
+    }
+    catch (error) {
+      console.error("Permission check failed:", error);
+      return false;
+    }
+  };
+
+  // 开始扫描
+  const startScan = async (): Promise<QRScanResult | null> => {
+    try {
+      // 检查是否为原生平台
+      if (!isSupported) {
+        console.warn("QR Scanner is only supported on native platforms");
+        return null;
+      }
+
+      // 检查权限
+      const hasPermission = await checkPermission();
+      if (!hasPermission) {
+        throw new Error("Camera permission denied");
+      }
+
+      // 隐藏背景以显示相机预览
+      await BarcodeScanner.hideBackground();
+
+      // 开始扫描
+      const result = await BarcodeScanner.startScan();
+
+      // 恢复背景
+      await BarcodeScanner.showBackground();
+
+      if (result?.hasContent) {
+        return {
+          text: result.content,
+          format: result.format || "QR_CODE",
+        };
+      }
+
+      return null;
+    }
+    catch (error) {
+      // 确保恢复背景
+      await BarcodeScanner.showBackground();
+      console.error("QR scan failed:", error);
+      throw error;
+    }
+  };
+
+  // 停止扫描
+  const stopScan = async () => {
+    try {
+      await BarcodeScanner.stopScan();
+      await BarcodeScanner.showBackground();
+    }
+    catch (error) {
+      console.error("Stop scan failed:", error);
+    }
+  };
+
+  return {
+    isSupported,
+    checkPermission,
+    startScan,
+    stopScan,
+  };
+}