Thomas Hess

• Caches UIImage instances in a NSCache
• Saves UIImage representations on disk as JPGs and PNGs
• Performs disk writes in a background queue

License: MIT

• Has iPhone portrait and iPad portrait and landscape layouts
• Supports variable PIN lengths
• Buttons can show numbers and letters or only numbers
• Background and tint colors as well as text and color of the prompt can be customized
• Supports solid color and translucent/blurred background

License: MIT