使用UITabbarcontroller从左向右过渡

Question

嗨，大家好我试图弄清楚如何使用我的uitabbarcontroller滑动屏幕时从左向右过渡（反之亦然）。

这是我有多远，但我不知道如何过渡到我需要它的工作：

 UIViewController * fromViewController = self.tabBarController.selectedViewController;
        UIViewController * toViewController = [self.tabBarController.viewControllers objectAtIndex:index];

    // set up an animation for the transition between the views
    CATransition *animation = [CATransition animation];
    [animation setDuration:0.5];
    [animation setType:kCATransitionPush];
    [animation setSubtype:kCATransitionFromRight];
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
    [[[fromViewController view] layer] addAnimation:animation forKey:@"switchToView"];


    CGRect endFrame = toViewController.view.frame;
    CGRect startFrame = endFrame;
    startFrame.origin.x += 320;
    toViewController.view.frame = startFrame;

    // Transition going left and right.
    [UIView transitionFromView:fromViewController.view toView:toViewController.view duration:4.0
                       options:UIViewAnimationOptionBeginFromCurrentState
                       completion:^(BOOL finished) {


                           toViewController.view.frame = endFrame;

                        if (finished) {
                            self.tabBarController.selectedIndex = index;
                        }

                    }];

我可以用什么方法来达到这种效果。