UISpitViewController-nel portrait modban a szoveges UIBarButtonItem kicserelese egy kepre

- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController {

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

    UIImage *customImage = [UIImage imageNamed:@"MyImage.png"];

    [button setBackgroundImage:customImage forState:UIControlStateNormal];

    [button setFrame:CGRectMake(0.0, 0.0, customImage.size.width, customImage.size.height)];

    [button addTarget:[barButtonItem target] action:[barButtonItem action] forControlEvents:UIControlEventTouchUpInside];

    [barButtonItem setCustomView:button];

    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];

    self.masterPopoverController = popoverController;

}