UINavigationBarAnimation.m

- (void)showNavigationBar {
    if (!navigationBarIsHidden) {
        return;
    }

    [UINavigationBar beginAnimations:@"NavBarFadeIn" context:nil];
    self.navigationController.navigationBar.alpha = 0;
    UIColor *color = [UIColor blackColor];
    NSMutableDictionary *titleTextAttributes = [self.navigationController.navigationBar.titleTextAttributes mutableCopy];
    titleTextAttributes[NSForegroundColorAttributeName] = color;
    self.navigationController.navigationBar.titleTextAttributes = titleTextAttributes;
    [self.navigationController.navigationBar setBackgroundImage:nil
                                                  forBarMetrics:UIBarMetricsDefault];
    //    _closeBarButtonItem.tintColor = color;
    [UINavigationBar setAnimationCurve:UIViewAnimationCurveEaseIn];
    [UINavigationBar setAnimationDuration:0.3];
    [UINavigationBar setAnimationTransition:UIViewAnimationTransitionNone
                                    forView:self.navigationController.navigationBar
                                      cache:YES];
    self.navigationController.navigationBar.alpha = 1;
    [UINavigationBar commitAnimations];

    //    [self changeNavigationBarTextColor:[UIColor whiteColor]];
    //    [UIView animateWithDuration:0.3 animations:^{
    //        _blurView.alpha = 1;
    //    }];

    [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationFade];
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];
    navigationBarIsHidden = NO;
}