Facebook publishes an iOS 9 GUI Kit for Designers
Most designers remember the Teehan+Lax releases that came after every iOS update. Unfortunately that agency closed down and have been scattered across the Internet. This leaves a certain gap to be filled by designers who may want to offer their own GUI kits.
One of the largest Internet companies Facebook put out their own iOS 9 GUI Kit for iPhone. These resources are sized specifically for iPhone users and thus may or may not fit well into an iPad app UI.
But the resource has been released in full for Photoshop and Sketch users.
Visit the iOS 9 GUI page for download links and more info.