IOS 如何改变push的方向

具体实现方式如下：

  CATransition* transition = [CATransition animation];

    transition.type = kCATransitionPush;            //改变视图控制器出现的方式

    transition.subtype = kCATransitionFromLeft;     //出现的位置

    [self.navigationController.view.layer addAnimation:transition forKey:kCATransition];

    [self.navigationController pushViewController:yourVC animated:NO];

       可选方式如下：

视图控制器出现的方式

CA_EXTERN NSString * const kCATransitionFade

CA_EXTERN NSString * const kCATransitionMoveIn

CA_EXTERN NSString * const kCATransitionPush

CA_EXTERN NSString * const kCATransitionReveal

出现的位置

CA_EXTERN NSString * const kCATransitionFromRight

CA_EXTERN NSString * const kCATransitionFromLeft

CA_EXTERN NSString * const kCATransitionFromTop

CA_EXTERN NSString * const kCATransitionFromBottom