CATransition *transition = [CATransition animation];    transition.duration = 1.0f;    transition.type = @"cube";    transition.subtype = kCATransitionFromLeft;//设置方向    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];//设置时间模式    transition.delegate = self;    transition.removedOnCompletion = YES;//完成时清除    [self.navigationController.view.layer addAnimation:transition forKey:@"animate"];