+- (void) setUnselectedViewController:(UIViewController *)transient {
+ NSMutableArray *controllers = [[self viewControllers] mutableCopy];
+ if (transient != nil) {
+ if (transient_ == nil)
+ remembered_ = [[controllers objectAtIndex:0] retain];
+ transient_ = transient;
+ [transient_ setTabBarItem:[remembered_ tabBarItem]];
+ [controllers replaceObjectAtIndex:0 withObject:transient_];
+ [self setSelectedIndex:0];
+ [self setViewControllers:controllers];
+ [self concealTabBarSelection];
+ } else if (remembered_ != nil) {
+ [remembered_ setTabBarItem:[transient_ tabBarItem]];
+ transient_ = transient;
+ [controllers replaceObjectAtIndex:0 withObject:remembered_];
+ [remembered_ release];
+ remembered_ = nil;
+ [self setViewControllers:controllers];
+ [self revealTabBarSelection];
+ }
+}
+
+- (UIViewController *) unselectedViewController {
+ return transient_;
+}
+
+- (void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
+ if ([self unselectedViewController])
+ [self setUnselectedViewController:nil];
+}
+