UITabBarController
#import "CHXTabBarControllerTransitioning.h"
...
// self.carrier = [[CHXTabBarTransitioningAnimatorCarrier alloc] initWithTabBarController:self];
self.carrier = [[CHXTabBarTransitioningAnimatorCarrier alloc] initWithTabBarController:self transitioningAnimatorStyle:CHXTabBarTransitioningAnimatorStyleCover];
// self.carrier.enablePanGestureRecognizer = NO;
self.delegate = self.carrier;