MBProgressHUD : Translucent HUD with Indicator and Label
An iOS drop-in class that displays a translucent HUD with an indicator and/or labels while a background thread is running. It is meant as a replacement for the UIKit UIProgressHUD with some additional features. It is compatible with both ARC and non-ARC projects. A demo app is included in the project repository and usage instructions are available in the project page. You can also go through this nice MBProgressHUD tutorial that discusses how to add and set up the class in your project and also provides usage examples.