What is it all about?
FLEX (Flipboard Explorer) is a set of in-app debugging and exploration tools for iOS development. When presented, FLEX shows a toolbar that lives in a window above your application. From this toolbar, you can view and modify nearly every piece of state in your running application.
* Inspect and modify views in the hierarchy. * See the properties and ivars on any object. * Dynamically modify many properties and ivars. * Dynamically call instance and class methods. * Observe detailed network request history with timing, headers, and full responses. * Add your own simulator keyboard shortcuts. * View system log messages (e.g. from NSLog). * Access any live object via a scan of the heap. * View the file system within your app's sandbox. * Browse SQLite/Realm databases in the file system. * Trigger 3D touch in the simulator using the control, shift, and command keys. * Explore all classes in your app and linked systems frameworks (public and private). * Quickly access useful objects such as [UIApplication sharedApplication], the app delegate, the root view controller on the key window, and more. * Dynamically view and modify NSUserDefaults values.