Merging screenshots and the generation of pdf file - iphone

Question

I am trying to make a UITable with different cells containing UITextfield, UITextview and UIImage. I want to generate a report-like pdf containing all the cells including images and text.
I have the code for making one screenshots for UITableviewcell. But i dont know how to make multiple screenshot then merge them together to form a one pdf file.
Below is the code that i have for making the UITableviewcell screenshot. Thanks
NSUInteger index[] = {0, 0}; // section, row
NSIndexPath *indexPath = [[NSIndexPath alloc] initWithIndexes:index length:2];
// Get the cell
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
// Render a graphics context to turn your cell into a UIImage
CGSize imageSize = cell.bounds.size;
UIGraphicsBeginImageContext(imageSize);
CGContextRef imageContext = UIGraphicsGetCurrentContext();
[cell.layer renderInContext:imageContext];
// Retrieve the screenshot image
UIImage *imagefinal = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(imagefinal, nil, nil, nil);

Answer 1

I dont know how to take multiple screenshots but i hav done some coding for merging two images you need to make some changes to this code for merging multiple screenshots. Here is code.
CGSize endImageSize = CGSizeMake(0, 0);
endImageSize = CGSizeMake(CELL_IMAGE_WIDTH,DesiredHeight);
UIGraphicsBeginImageContext(endImageSize);
// draw images into this context
[anOriginalImage1 drawInRect:CGRectMake(0, 0,
endImageSize.width, IMAGE1_HEIGHT)];
[anOriginalImage2 drawInRect:CGRectMake(0, IMAGE1_HEIGHT,
endImageSize.width, IMAGE2_HEIGHT)];
//convert context into a UIImage
UIImage *endImage = UIGraphicsGetImageFromCurrentImageContext();
//cleanup
UIGraphicsEndImageContext();