gistify772347.rb

        [UIView animateKeyframesWithDuration:0.5 delay:0 options:UIViewKeyframeAnimationOptionCalculationModeLinear animations:^
        {
            CGRect newFrame = self.view.bounds;
            newFrame.origin.y = newFrame.size.height;
            [webView setFrame:newFrame];
        }
        completion:^(BOOL finished)
        {

        }];