How to generate pdf for particular section with header in uitableview?

- (NSMutableData*)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
{
    // Creates a mutable data object for updating with binary data, like a byte array
    NSMutableData *pdfData = [NSMutableData data];
    
    // Points the pdf converter to the mutable data object and to the UIView to be converted
    UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
    UIGraphicsBeginPDFPage();
    CGContextRef pdfContext = UIGraphicsGetCurrentContext();
    
    // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
    
    [aView.layer renderInContext:pdfContext];
    
    // remove PDF rendering context
    UIGraphicsEndPDFContext();
    
    // Retrieves the document directories from the iOS device
    NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
    
    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];
    
    // instructs the mutable data object to write its context to a file on disk
    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
     NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
    return pdfData;
}
- (void)renderTableView:(UITableView*)tableview indexPathStart:(NSIndexPath *)startingIndexPath indexPathEnd:(NSIndexPath *)endIndexPath {
    CGRect rectToDraw = CGRectUnion([tableview rectForRowAtIndexPath:startingIndexPath], [tableview rectForRowAtIndexPath:endIndexPath]);
    
    NSLog(@"%@", NSStringFromCGRect(rectToDraw));
    
    UIGraphicsBeginImageContext(rectToDraw.size);
    [tableview.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *saveImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    [saveImage drawInRect:rectToDraw];
    imageData = UIImagePNGRepresentation(saveImage);   
}

-(void)sendSectionpdfMail{
    [ExpenseseTableview reloadData];

  [self renderTableView:ExpenseseTableview indexPathStart:[NSIndexPath indexPathForRow:0 inSection:sectionTag] indexPathEnd:[NSIndexPath indexPathForRow:1 inSection:sectionTag]];
    
    UIImage *image = [UIImage imageWithData:imageData];
    UIImageView *imageView = [[UIImageView alloc]initWithImage:image];
    
    [self createPDFfromUIView:imageView saveToDocumentsWithFileName:@"Expenses.pdf"];

}