A Swift utility library providing UI definitions, audio extensions, and Foundation/CoreGraphics conveniences for macOS and iOS development.
- Platforms: macOS 13+, iOS 16+
- Swift: 6.2+
- DictionaryParser — Type-safe accessor wrapper around
[String: Any]dictionaries with support for strings, numbers, booleans, URLs, and nested structures. - Rescale — Linear interpolation and mapping between numeric domains and ranges.
- Counter — Simple incrementing counter with reset support.
- ProgressTracker / ChunkedProgressTracker — Track completion progress as a normalized value, with optional chunked progress for parallel operations.
- URLProperties — Structured metadata container for URL-associated properties.
- HardwareInfo — System hardware queries (model identifier, machine name).
- ProcessHandler — Launch and manage external processes with stdout/stderr capture.
- StereoState — Enumeration of stereo routing states (stereo, mono, left, right, swapped).
- HexColor / RGBAColor — Hex string and RGBA representations for cross-platform color handling.
- **SPFKColor / CustomComponentColor ** — Platform-agnostic color types bridging AppKit and UIKit.
- AppearanceObserver — Observe system appearance (light/dark mode) changes via Combine.
- StateImage — Associate images with on/off/disabled control states.
- FirstResponder — Utilities for managing first responder status in AppKit.
Categorized extensions across Foundation, AppKit, CoreGraphics, and Audio frameworks:
| Category | Highlights |
|---|---|
| Foundation | String (padding, truncation, data conversion), URL (parent detection, query parameters, bookmark management), Dictionary (merging, key mapping), TimeInterval (mach time conversion), UUID (zero constants), NumberFormatter |
| AppKit | NSView (Auto Layout constraint helpers), NSImage (resizing, tinting), NSWindow (positioning), NSEdgeInsets (convenience inits) |
| CoreGraphics | CGImage (scaling), CGRect (square fitting), CGSize (equality init), CGColor (hex conversion) |
| Audio | AUValue (dB/linear conversion, normalization), AVAudioTime (host time utilities) |
| XML | PlistUtilities (dictionary/plist round-trip serialization via AEXML) |
Embedded EntropyString library for generating cryptographically random identifiers with configurable character sets and entropy levels (small, medium, large, session, token).
| Package | Description |
|---|---|
| spfk-audio-base | Shared audio type definitions |
| spfk-filesystem | File system utilities, directory observation, Finder tags |
| AEXML | XML parsing and generation |
| Checksum | File checksum utilities |
Spongefork (SPFK) is the personal software projects of Ryan Francesconi. Dedicated to creative sound manipulation, his first application, Spongefork, was released in 1999 for macOS 8. From 2016 to 2025 he was the lead macOS developer at Audio Design Desk.