UITableViewController - Fixed Background Image

you can try to add the background image as UIView and not as UIColor, try this:

 self.tableView.backgroundView = [[UIImageView alloc] initWithImage:
                                 [UIImage imageNamed:@"blurredBGW.png"]];

for swift version 3.0.try this code.it will set a fixed background to a table view controller

 self.tableView.backgroundView = UIImageView(image: UIImage(named: "background.png")!)