这种方式很好的解决了当前页面有navigationbar，而跳转到的页面却不需要Navigationbar的情况（来自电池管家）

-(void)animationPush:(UIViewController *)viewcontroller hidden:(BOOL)flag
{
    self.navigationController.navigationBar.hidden = flag;
    CATransition *animation = [CATransitionanimation];
    [animation setDuration:0.3];
    [animation setType: kCATransitionPush];
    [animation setSubtype:kCATransitionFromRight];
    
    [animation setTimingFunction:[CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionDefault]];
    [self.navigationControllerpushViewController:viewcontrolleranimated:NO];
    [self.navigationController.view.layeraddAnimation:animationforKey:nil];
}