Specification of tab bar image?


Where can I find appropriate tab bar images? Or can I create my own images? What are the specifications?

I tried creating one with 30x30 px in PNG format. After build and run, it just showed a opaque square instead of the image itself.
Does anyone know the problem with it?



The images used in the UITabBar only use the alpha mask of the image. Thus, you need an image that specifies a shape with opaque pixels and the rest of the pixels are left transparent.