Processing feedback during view transitions

How do most projects provide processing feedback during longer view transitions?

When transitioning from one view to another what is the preferred way to provide feedback to the user? This is in a situation where the view is not immediately rendered.

Q: Is a singleton processing object presented on beginning of view change and then removed after transition?

Q: If yes, then where is the best place to turn off the processing? Is it on the attach() of the subsequent view?