Test Objective C snippet

objcsnippet.m

 //start scanning when the Scan button is pushed down (touch down)  
 - (IBAction)startScanning:(id)sender {  
   if(![self.session isRunning])  
   {  
     [self.barcodeScanAreaView.layer addSublayer:_prevLayer];  
     [_session startRunning];  
     [self.barcodeScanAreaView bringSubviewToFront:_highlightView]; //isn't necessary at this point because the line gets removed before anyone sees it. Could be useful if there was a delay before shutting down the view and recording the scan  
   }  
 }  
 //stop scanning when the button is pushed up (inside button) (touch up inside)  
 - (IBAction)stopScanning:(id)sender {  
   if([self.session isRunning])  
   {  
     [_session stopRunning]; //this makes the camera stop streaming to the screen.  
     [self.prevLayer removeFromSuperlayer]; //this makes the view containing the camera image go blank  
   }  
 }  
 //stop scanning when the button is pushed up (outside button) (touch up outside)  
 - (IBAction)stopScanning_Outside:(id)sender {  
   if([self.session isRunning])  
   {  
     [_session stopRunning];  
     [self.prevLayer removeFromSuperlayer];  
   }  
 }