Question

I have a UITabBarController with a few tabs.
When I click a UIButton on first view (tab) I would like to slide whole UITabBarController out and show new UIView that is positioned bellow UITabBarController.

Something like it happens on youtube iPhone app when you start playing video.

I add UITabBarController to window in appDelegate like that:

self.window.rootViewController = self.tabBarController;

SOLUTION:

[self.view.window insertSubview:welcomeViewController.view atIndex:0];
[UIView animateWithDuration:1.0 delay:0. options:UIViewAnimationOptionBeginFromCurrentState animations:^{
    CGRect frame = self.tabBarController.view.frame;
    frame.origin.x += 400;
    self.tabBarController.view.frame = frame;
} completion:^(BOOL finished) {
    //
}];

Answer 1

Try moving your tab bar controller frame out of sight:

CGRect newFrame = tabBarController.view.frame;
newFrame.origin.y += winHeight;
[UIView
    animateWithDuration:0.5
    animations:^{
        tabBarController.view.frame = newFrame;
    }];