Inline View Switcher
Pretty simple problem, we lack a pattern for changing only part of a view while some other pertinent information or controls remain fixed at the top of the view. This was brought to us by way of a developer of a Twitter client where a user's profile view would have the profile information at the top and various switchable subviews below it, however I can see the use case extending beyond that.
Here's the concept I have for an "inline view switcher" to solve this problem, behaves much like the current view switcher it just will have this inline appearance instead of full-width.