I am building a PencilKit app that interprets a canvasView.drawing's size. Drawings below a certain size are interpreted as tap gestures and get cleared in the interpretation process.
Effectively, I am doing it like this:
On my 2020 iPad Pro, this works flawlessly. On other iPads however, I observe a strange behaviour:
In a series of drawing little specks on the canvas that are all supposed to be cleared immediately, sometimes the canvas seems to not be cleared, a single speck stays visible. After I draw the next speck somewhere else, the clearing is functional again, which means the canvas was internally emptied, the visible state was just not up-to-date.
Finger input on the canvas is deactivated. The canvas tool is set to pencil, width 5.0.
Does anybody have an idea what could be the reason for this behaviour?
Effectively, I am doing it like this:
Code Block func canvasViewDrawingDidChange(_ canvasView: PKCanvasView) { // Check if drawing is empty, // otherwise this would loop guard !canvasView.drawing.bounds.isEmpty else { return } if canvasView.drawing.bounds.width < 10 && canvasView.drawing.bounds.height < 10 { canvasView.drawing = PKDrawing() handleDetectedTapGesture() } }
On my 2020 iPad Pro, this works flawlessly. On other iPads however, I observe a strange behaviour:
In a series of drawing little specks on the canvas that are all supposed to be cleared immediately, sometimes the canvas seems to not be cleared, a single speck stays visible. After I draw the next speck somewhere else, the clearing is functional again, which means the canvas was internally emptied, the visible state was just not up-to-date.
Finger input on the canvas is deactivated. The canvas tool is set to pencil, width 5.0.
Does anybody have an idea what could be the reason for this behaviour?
