What is the name of the black translucent notification window?

What is the name of the feature that displays a black transparent notification (often only a few seconds in iOS. It shows for e开发者_运维技巧xample when you switch the mute button on the phone.

Currently developers don't have access to such notification effects from the official SDK. But you may try this, MBProgressHUD, https://github.com/jdg/MBProgressHUD . It's a third party tool, but it works well and looks good.

It's called a HUD (Heads Up Display).