iPhone - Create a semi transparent rectangle with opaque text

Question

I have a MapView and I want to display a black semi transparent rectangle on top with a text inside. Not over the entire map only on section of it (maybe on the top corner)

Answer 1

Can be easily done with interface builder:

View Hierarchy

NOTE The background has to be a separate view which is the first entry in the list of controls, so it is in the background. Setting the container view to an alpha value below 1 will also be inherited by the subviews, which is not displayed in the interface builder

Settings for view "view with clear color bg and alpha 1.0"

Settings for view "black translucent bg view"