Merge pull request MasteringOpenCV#32 from SSteve/master

Check that the return value is nil before attempting to do anything with...
maximus009 · Jun 2, 2014 · f3b6916 · f3b6916
2 parents 8736df1 + 6d6167a
commit f3b6916
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Chapter2_iPhoneAR/Example_MarkerBasedAR/Example_MarkerBasedAR/VideoSource.mm b/Chapter2_iPhoneAR/Example_MarkerBasedAR/Example_MarkerBasedAR/VideoSource.mm
@@ -146,7 +146,7 @@ - (bool) startWithDevicePosition:(AVCaptureDevicePosition)devicePosition
         AVCaptureDeviceInput *videoIn = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error];
         self.deviceInput = videoIn;
 
-        if (!error)
+        if (nil != videoIn)
         {
             if ([[self captureSession] canAddInput:videoIn])
             {
@@ -160,7 +160,7 @@ - (bool) startWithDevicePosition:(AVCaptureDevicePosition)devicePosition
         }
         else
         {
-            NSLog(@"Couldn't create video input");
+    		NSLog(@"Couldn't create video input: %@", [error localizedDescription]);
             return FALSE;
         }
     }