captureStillImageAsynchronouslyFromConnection
captures only data from connection (AVCaptureConnection
) and the additional images are not in connection. They are in the view.
So, to "generate" an image with all elements (picture and overlay), you must have to do something like this:
UIGraphicsBeginImageContext(stillImage.size);
[stillImage drawInRect:CGRectMake(0, 0, picture.size.width, picture.size.height)];
[overlayImageView drawInRect:CGRectMake(overlayImageView.frame.origin.x, overlayImageView.frame.origin.y, overlayImageView.frame.size.width, overlayImageView.frame.size.height)];
UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
This code is considering that picture size is equal to screen size. If picture size is different, you have to calculate the coordinates to place the overlay in the drawRect
method. Sorry for bad english.