how to create overlay view for camera and access its methods in iphone sdk?
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hi i have searched lot of for custom camera overlay view. i have find almost many sample projects but i can't still get perfect answer as i want to get. My question is i want to implement custom camera like `instagram` or `picyou` or other social networking apps on button click open custom camera using camera overlay view. i have created custom camera it works fine but i want to access the buttons actions like on capturing image it should navigate to other view by using `UINavigationController` but its not working.i have used this code for calling camera overlay view.

    -(void)OpenCamera
    {
        //create an overlay view instance
    	OverlayView *overlay = [[OverlayView alloc]
    							initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGTH)];
        
    	UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    	picker.delegate = self; 
    	//        picker.allowsEditing = YES;
    	picker.allowsEditing = NO;
    	if (([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])) 
    	{
            //set source to video!
            picker.sourceType = UIImagePickerControllerSourceTypeCamera;
            //hide all controls
            picker.showsCameraControls = NO;
            picker.navigationBarHidden = YES;
            picker.toolbarHidden = YES;
            //make the video preview full size
            picker.wantsFullScreenLayout = YES;
            picker.cameraViewTransform =
            CGAffineTransformScale(picker.cameraViewTransform,
                                   CAMERA_TRANSFORM_X,
                                   CAMERA_TRANSFORM_Y);
            //set our custom overlay view
            picker.cameraOverlayView = overlay;
    //        picker.delegate = overlay;
            
    //        UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:picker];
            
            //show picker
            [self presentModalViewController:picker animated:YES];	
    	}
    	else
    	{
            picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
            picker.delegate = self;
            [self presentModalViewController:picker animated:YES];
    	}
    	[picker release];
    }
and this is my camera overlay view .m file code i have used `@interface OverlayView : UIView`

    - (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        //clear the background color of the overlay
    //    self.opaque = NO;
    //    self.backgroundColor = [UIColor clearColor];
        
        UIToolbar *toolbar = [UIToolbar new];
        
        toolbar.barStyle = UIBarStyleBlackTranslucent;
        
        // create a bordered style button with custom title
        
        UIBarButtonItem *Cancel = [[[UIBarButtonItem alloc] initWithTitle:@"Cancel"
                                      
                                                                      style:UIBarButtonItemStyleBordered	
                                      
                                                                     target:self
                                      
                                                                     action:@selector(btnCancel:)] autorelease];
        
        UIBarButtonItem *flexibleSpace1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    
        UIBarButtonItem *Camera = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(btnCapture:)] autorelease]; 
        
        UIBarButtonItem *flexibleSpace2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
        
        UIBarButtonItem *Album = [[[UIBarButtonItem alloc] initWithTitle:@"Gallery"
                                       
                                                                       style:UIBarButtonItemStyleBordered
                                       
                                                                      target:self
                                       
                                                                      action:@selector(btnLibrary:)] autorelease];
        
        NSArray *items = [NSArray arrayWithObjects: 
                          
                          Cancel,
                          flexibleSpace1,
                          Camera,
                          flexibleSpace2,
                          Album,
                          
                          nil];
        
        toolbar.items = items;
        
        // size up the toolbar and set its frame
        
        // please not that it will work only for views without Navigation toolbars. 
        
        [toolbar sizeToFit];
        
        CGFloat toolbarHeight = [toolbar frame].size.height;
        
        CGRect mainViewBounds = self.bounds;
        
        [toolbar setFrame:CGRectMake(CGRectGetMinX(mainViewBounds),
                                     
                                     CGRectGetMinY(mainViewBounds) + CGRectGetHeight(mainViewBounds) - (toolbarHeight),
                                     
                                     CGRectGetWidth(mainViewBounds),
                                     
                                     toolbarHeight)];
        
        [self addSubview:toolbar];
    }
    return self;
    }
    
    -(void)btnLibrary:(id)sender
    {
        
    }
    
    -(void)btnCapture:(id)sender
    {
        
    }
    
    -(void)btnCancel:(id)sender
    {
    //    [self dismissModalViewControllerAnimated:YES];
    }

its all working fine but as i said i want to access buttons methods and the UINavigationController for changing the view like `instagram` and `picyou` its not working properly can you guide me how to navigate to another view.?