You can use a native iOS implementation. I wrote a demo app over Christmas break using Pixate and it was so easy to style. The only problem was that including Pixate caused a crash when I tried to removed the camera view controller so I had to redo the whole thing native.

That's when I realized the power of Pixate. My code got a bit more complex having to implement the gradient layers, borders and background images in Objective-C. I ended up migrating it, but Pixtae was definitely a lot simpler.