FLEX

What is FLEX?

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.

Features:

• 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.

Unlike many other debugging tools, FLEX runs entirely inside your app, so you don’t need to be connected to LLDB/Xcode or a different remote debugging server. It works well in the simulator and on physical devices.

Overview