How to add a overlay view to the cameraview and save it - iphone

Question

Thanks in advance.
I want to add an image view as a overlay view to the camera and save both the (cameraview and image view )as a single image. I searched for it and tried the example given in stackoverflow but it is not displaying any thing than blank screen .If any one know please help me.

Answer 1

- (void)renderView:(UIView*)view inContext:(CGContextRef)context
{
// -renderInContext: renders in the coordinate space of the layer,
// so we must first apply the layer's geometry to the graphics context
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [view center].x, [view center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [view transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[view bounds].size.width * [[view layer] anchorPoint].x,
-[view bounds].size.height * [[view layer] anchorPoint].y);
// Render the layer hierarchy to the current context
[[view layer] renderInContext:context];
// Restore the context
CGContextRestoreGState(context);
}
// this get called when an image has been taken from the camera
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
//cameraImage = image;
CGSize imageSize = [[UIScreen mainScreen] bounds].size;
if (NULL != UIGraphicsBeginImageContextWithOptions)
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
// Draw the image returned by the camera sample buffer into the context.
// Draw it into the same sized rectangle as the view that is displayed on the screen.
float menubarUIOffset = 44.0;
UIGraphicsPushContext(context);
[image drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height-menubarUIOffset)];
UIGraphicsPopContext();
// Render the camera overlay view into the graphic context that we created above.
[self renderView:self.imagePicker.view inContext:context];
// Retrieve the screenshot image containing both the camera content and the overlay view
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIImageWriteToSavedPhotosAlbum(screenshot, nil, nil, nil);
UIGraphicsEndImageContext();
[self.imagePicker dismissModalViewControllerAnimated:YES];
}
Hope this helps