UITableView background showing in Interface Builder but in simulator

does anyone know why, if I add an image UIImage as background, I can c开发者_Python百科learly see it behind my grouped table view in Interface Builder. However when I launch the app, the background is not showing at all, both in simulator and device.

Apart from adding the image, I suppose I already did all the steps at TableView programmatic side:

self.tableView.backgroundColor = [UIColor clearColor];
self.tableView.opaque = NO;
self.tableView.backgroundView = nil;

thanks

Following a post I made, I found two possible solutions, one with UIViewController in place of UITableVIewController as discussed here:

UITableView with fixed image background

with a disadvantage of header and footer problem with grouped table.

The other solution, involves writing more code and could be the case only if you have a common table that you share within different views of the apps: basically is to have a UIViewController calling a UITableViewController and attach its subview to self.view.