Customize UI from source

For deep customization of UI Extensions UI and behavior, import the open-source uiextensions project and modify it at source level.

Integrate the source project

The SDK’s libs/uiextensions directory contains the full UI Extensions source. Add it to your Xcode workspace:

1. Open your .xcworkspace.
2. Drag libs/uiextensions/uiextensions.xcodeproj into the workspace Project Navigator.
3. In your app target → General → Frameworks, Libraries, and Embedded Content, add libFoxitRDKUIExtensions.a (static library).
4. In Build Settings → Header Search Paths, add UI Extensions header paths.

INFO

After integrating source, you do not need uiextensionsDynamic.framework— use one or the other.

Source layout

Main directories:

Directory	Description
PublicHeaders/	Public headers (UIExtensionsManager.h, UIExtensionsConfig.h, etc.)
UIExtensions/	Feature modules (annotations, bookmarks, search, signatures, thumbnails, etc.)

Customization examples

At source level you can:

• Change toolbar button layout and styling
• Add custom feature modules
• Change default annotation tool behavior
• Adjust panel UI layout

Mac Catalyst support

For Mac Catalyst, use the project under libs/uiextensions/ios_catalyst/, adapted for macOS.

Important

Track SDK upgrades when you modify source; merge upstream changes when updating the SDK version.