update version

Reproduced in 3.1, see #60

src/ios/CDVBarcodeScanner.mm

@@ -10,6 +10,7 @@
 #import <UIKit/UIKit.h>
 #import <AVFoundation/AVFoundation.h>
 #import <AssetsLibrary/AssetsLibrary.h>
+#import <AudioToolbox/AudioToolbox.h>
 
 //------------------------------------------------------------------------------
 // use the all-in-one version of zxing that we built
@@ -205,6 +206,8 @@
 @synthesize is2D                 = _is2D;
 @synthesize capturing            = _capturing;
 
+SystemSoundID _soundFileObject;
+
 //--------------------------------------------------------------------------
 - (id)initWithPlugin:(CDVBarcodeScanner*)plugin
             callback:(NSString*)callback
@@ -222,6 +225,9 @@ parentViewController:(UIViewController*)parentViewController
     self.is2D      = YES;
     self.capturing = NO;
     
+    CFURLRef soundFileURLRef  = CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("CDVBarcodeScanner.bundle/beep"), CFSTR ("caf"), NULL);
+    AudioServicesCreateSystemSoundID(soundFileURLRef, &_soundFileObject);
+    
     return self;
 }
 
@@ -237,6 +243,9 @@ parentViewController:(UIViewController*)parentViewController
     
     self.capturing = NO;
     
+    AudioServicesRemoveSystemSoundCompletion(_soundFileObject);
+    AudioServicesDisposeSystemSoundID(_soundFileObject);
+    
     [super dealloc];
 }
 
@@ -281,6 +290,9 @@ parentViewController:(UIViewController*)parentViewController
 //--------------------------------------------------------------------------
 - (void)barcodeScanSucceeded:(NSString*)text format:(NSString*)format {
     [self barcodeScanDone];
+    
+    AudioServicesPlaySystemSound(_soundFileObject);
+    
     [self.plugin returnSuccess:text format:format cancelled:FALSE callback:self.callback];
 }
 
@@ -320,7 +332,9 @@ parentViewController:(UIViewController*)parentViewController
     output.alwaysDiscardsLateVideoFrames = YES;
     output.videoSettings = videoOutputSettings;
     
-    [output setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
+    dispatch_queue_t queue = dispatch_queue_create("CDVBarcodeScanner", NULL);
+    [output setSampleBufferDelegate:self queue:queue];
+    dispatch_release(queue);
     
     if (![captureSession canSetSessionPreset:AVCaptureSessionPresetMedium]) {
         return @"unable to preset medium quality video capture";
@@ -416,7 +430,13 @@ parentViewController:(UIViewController*)parentViewController
         const char* cString      = resultText->getText().c_str();
         NSString*   resultString = [[[NSString alloc] initWithCString:cString encoding:NSUTF8StringEncoding] autorelease];
         
-        [self barcodeScanSucceeded:resultString format:format];
+        NSMethodSignature *sig = [self methodSignatureForSelector:@selector(barcodeScanSucceeded:format:)];
+        NSInvocation *invoke = [NSInvocation invocationWithMethodSignature:sig];
+        [invoke setTarget:self];
+        [invoke setSelector:@selector(barcodeScanSucceeded:format:)];
+        [invoke setArgument:&resultString atIndex:2];
+        [invoke setArgument:&format atIndex:3];
+        [invoke performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:YES];
         
     }
     catch (zxing::ReaderException &rex) {
@@ -855,4 +875,4 @@ parentViewController:(UIViewController*)parentViewController
     [super willAnimateRotationToInterfaceOrientation:orientation duration:duration];
 }
 
-@end
+@end