diff --git a/DealStrideSolution/entry/src/main/ets/utils/CameraServiceTwo.ets b/DealStrideSolution/entry/src/main/ets/utils/CameraServiceTwo.ets
index 1e92ea260692ef0b1a8a9c255b0574281ae2373d..9a69a50386e584c2bfe90f2dd014eced655c5720 100644
--- a/DealStrideSolution/entry/src/main/ets/utils/CameraServiceTwo.ets
+++ b/DealStrideSolution/entry/src/main/ets/utils/CameraServiceTwo.ets
@@ -179,13 +179,13 @@ class CameraService {
     }
   }
 
-  getPreviewRotation() {
+  getPreviewRotation(): void {
     let previewRotation: camera.ImageRotation | undefined = camera.ImageRotation.ROTATION_0;
     try {
       previewRotation = this.previewOutput?.getPreviewRotation(previewRotation);
       AppStorage.set('previewRotation', previewRotation);
     } catch (error) {
-      let err = error as BusinessError;
+      let err: BusinessError = error as BusinessError;
       hilog.warn(0x000, 'testTag', `setColorMode failed, code=${err.code}, message=${err.message}`);
     }
   }