Convert the handler functions for the torch, flipCamera, and shutter …

…buttons to IBAction (#511)

* Converted the handler functions for the torch, flipCamera, and shutter buttons to IBAction in order to expose them to custom/alternative overlay xibs.

* Added flipCameraButtonPressed and torchButtonPressed to CDVbcsViewController interface.

* Resize the UIView from the alternate xib so that it fits the screen.

src/ios/CDVBarcodeScanner.mm

@@ -118,6 +118,8 @@ - (UIView*)buildOverlayView;
 - (UIImage*)buildReticleImage;
 - (void)shutterButtonPressed;
 - (IBAction)cancelButtonPressed:(id)sender;
+- (IBAction)flipCameraButtonPressed:(id)sender;
+- (IBAction)torchButtonPressed:(id)sender;
 
 @end
 
@@ -938,7 +940,7 @@ - (void)startCapturing {
 }
 
 //--------------------------------------------------------------------------
-- (void)shutterButtonPressed {
+- (IBAction)shutterButtonPressed {
     self.shutterPressed = YES;
 }
 
@@ -947,12 +949,12 @@ - (IBAction)cancelButtonPressed:(id)sender {
     [self.processor performSelector:@selector(barcodeScanCancelled) withObject:nil afterDelay:0];
 }
 
-- (void)flipCameraButtonPressed:(id)sender
+- (IBAction)flipCameraButtonPressed:(id)sender
 {
     [self.processor performSelector:@selector(flipCamera) withObject:nil afterDelay:0];
 }
 
-- (void)torchButtonPressed:(id)sender
+- (IBAction)torchButtonPressed:(id)sender
 {
   [self.processor performSelector:@selector(toggleTorch) withObject:nil afterDelay:0];
 }
@@ -967,7 +969,16 @@ - (UIView *)buildOverlayViewFromXib
         NSLog(@"%@", @"An error occurred loading the overlay xib.  It appears that the overlayView outlet is not set.");
         return nil;
     }
-
+
+	self.overlayView.autoresizesSubviews = YES;
+    self.overlayView.autoresizingMask    = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+    self.overlayView.opaque              = NO;
+
+	CGRect bounds = self.view.bounds;
+    bounds = CGRectMake(0, 0, bounds.size.width, bounds.size.height);
+
+	[self.overlayView setFrame:bounds];
+
     return self.overlayView;
 }