-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{        AAAViewController * aaa = [[AAAViewController alloc]init];    CATransition * transition = [CATransition animation];    transition.duration = 0.3;    transition.type = kCATransitionPush;    transition.subtype = kCATransitionFromRight;    [self.view.window.layer addAnimation:transition forKey:nil];    [self presentViewController:aaa animated:NO completion:nil];    }

-(void )touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    CATransition * transition = [CATransition animation];    transition.duration = 0.3;    transition.type = kCATransitionPush;    transition.subtype = kCATransitionFromLeft;    [self.view.window.layer addAnimation:transition forKey:nil];    [self dismissViewControllerAnimated:NO completion:nil];}

用 presentViewController和dismissViewControllerAnimated  实现 pushViewController和popViewControllerAnimated动画