IPhone : Push animation fades both views at end, How can I display them without faded till animation ends?

I have a push animation like slider but not interactive. Problem is both views get faded at end. Both view should keep displaying till animation ends. I already have check both views, none of them have clearColor. Here's the code which I am trying to do:

- (IBAction)loginButtonTapped:(id)sender
{
LoginViewController *viewController = [self.storyboard instantiateViewControllerWithIdentifier:@"LoginViewController"];
dispatch_async(dispatch_get_main_queue(), ^{
    [CATransaction begin];
    [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
    CATransition *transition = [CATransition animation];
    transition.duration = 0.3f;
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromRight;
    transition.fillMode = kCAFillModeBoth;
    CAMediaTimingFunction *timeFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    transition.timingFunction = timeFunction;
    transition.removedOnCompletion = YES;
    [self.navigationController.view.layer addAnimation:transition forKey:@"someAnimation"];

    [self.navigationController pushViewController:viewController animated:NO];
    [CATransaction commit];
});

}

It results into following animation:Cant upload the image Dropbox link https://www.dropbox.com/s/k6w7k8p520w8yrx/PushAnimation.gif?dl=0