UITabBar wont hide - iphone

Question

I have a UINavigationController in a UITabBarController, and I can't seem to get a pushed viewController's tabBar to hide.
I am using the following code to hide it:
Before it gets pushed:
tpsv.hidesBottomBarWhenPushed = YES;
tpsv.tabBarController.hidesBottomBarWhenPushed = YES;
viewWillAppear:
self.tabBarController.tabBar.hidden = YES;
AppDelegate *del = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[[[del tabController] tabBar]setHidden:YES];
But none of the above work.
If you could tell me how to fix this, that would be great.

Answer 1

You set this before you push the new view controller:
MyViewController *myVC = [[[MyViewController alloc] init] autorelease];
myVC.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:myVC animated:YES];
[EDIT: comment re usage]
Just noticed you say you tried this. Not sure what else you're doing in the context of pushing your VC or configuring it but this does work fine. It's how I do this exact thing in my apps.

Answer 2

- (void) hideTabBar:(UITabBarController *) tabbarcontroller {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
for(UIView *view in tabbarcontroller.view.subviews)
{
if([view isKindOfClass:[UITabBar class]])
{
[view setFrame:CGRectMake(view.frame.origin.x, 480, view.frame.size.width, view.frame.size.height)];
}
else
{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 480)];
}
}
[UIView commitAnimations];
}
- (void) showTabBar:(UITabBarController *) tabbarcontroller {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];
for(UIView *view in tabbarcontroller.view.subviews)
{
NSLog(#"%#", view);
if([view isKindOfClass:[UITabBar class]])
{
[view setFrame:CGRectMake(view.frame.origin.x, 431, view.frame.size.width, view.frame.size.height)];
}
else
{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 431)];
}
}
[UIView commitAnimations];
}

Answer 3

I've faced the same problem with
myVC.hidesBottomBarWhenPushed = YES;
It does'nt remove the tab bar in subsequent views. May be it's deprecated. You should'nt face this problem with the setHidesBottomBarWhenPushed: command. Try using the following for views:
MyViewController *myVC = [[[MyViewController alloc] init] autorelease];
[myVC setHidesBottomBarWhenPushed:YES];
[self.navigationController pushViewController:myVC animated:YES];