Customize UITabBarItem
===

I know it's possible to customize UITabBarItem in iOS 5 using 

    [[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_sel"]];
The tabbar_sel image has the width 120px (640px/5). For landscape mode I need to change this to a image with 190x width. 

    - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
	if(toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
		NSLog(@"landscape.");
		[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_sel_l"]];
	    } else {
		NSLog(@"normal.");
		[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_sel"]];
	    }
    }
However, this does not work, Either in delegate class or in the ViewController.
I also already tried this but it leads to a crash.

    [[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_sel"] 
    forBarMetrics:UIBarMetricsDefault];
    [[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_sel_l"] forBarMetrics:UIBarMetricsLandscapePhone];