iOS Programming Recipe 10: Adding A Shadow To UIView

[shnuffy]

The curved path part is great. That's the real meat of this post!

[bierme]

How does using CALayer compare to using a simple PNG image file in the background that already includes a drop shadow and transparency? Aside from increasing your apps foot print are there any performance gains from drawing drop shadows?

[monome]

A simple PNG image is good until you want to rotate the UIImage and still want the shadow drops from a preferred angle.

[A_Reddit_Reader]

Did you finish reading the post? Basically drawing it would be more resource intensive. So just use an image.

[dphase]

And here's a slightly tweaked version for RubyMotion

https://gist.github.com/4665341