pencilkit

Capture Apple Pencil input into a serializable PKDrawing data representation by configuring a PKCanvasView with appropriate drawingPolicy. Use a UIViewRepresentable wrapper to bind PKDrawing state into SwiftUI, capturing pencil and finger strokes while avoiding update loops.

Save and export PKDrawing data by serializing the drawing object using dataRepresentation() to persist it to disk. You can also combine and transform drawings, export specific canvas regions as images, and manage content version compatibility for cross-version sharing.

PencilKit works with SwiftUI on iPadOS and visionOS by using a UIViewRepresentable wrapper pattern to integrate PKCanvasView. This wrapper binds PKDrawing into SwiftUI state, compatible with Swift 6.3 and iOS 26+, enabling native drawing and annotation features.

Manage the PKToolPicker lifecycle by presenting and observing the picker to let users choose inks, erasers, lasso, and ruler tools. Ensure the picker visibility stays correctly synchronized with your PKCanvasView to maintain a stable drawing interface.

PKCanvasView accepts finger input alongside Apple Pencil strokes by configuring the appropriate drawingPolicy. This allows the canvas to capture both touch and pencil inputs simultaneously for flexible drawing, annotation, and signature capture scenarios.

Inspect strokes within a PKDrawing object by accessing the individual stroke elements after capturing input into the serializable data representation. This stroke inspection allows you to analyze and transform ink data before exporting regions as images or saving to disk.