PencilKit PKStrokePointのサイズ

2024年5月25日

PKStrokePoint

init(location:timeOffset:size:opacity:force:azimuth:altitude:)

size：The size of this point.

Example Code

func strokeRectangle(location: CGPoint) {
    let size: CGFloat = 8
    let x = location.x - (size / 2)
    let y = location.y - (size / 2)
    let pointArrays = [
        [CGPoint(x: x, y: y),
            CGPoint(x: x + size, y: y),
            CGPoint(x: x + size, y: y + size),
            CGPoint(x: x, y: y + size),
            CGPoint(x: x, y: y)],
    ]
    let pKTool = self.tool
    if let pKInkingTool = pKTool as? PKInkingTool {
        let color = pKInkingTool.color
        let ink = PKInk(.pen, color: color)
        var strokes: [PKStroke] = []

        for points in pointArrays where points.count > 1 {
            let strokePoints = points.enumerated().map { index, point in
                PKStrokePoint(location: point, timeOffset: 0.1 * TimeInterval(index), size: CGSize(width: 1.8, height: 1.8), opacity: 1, force: 1, azimuth: 0, altitude: 0)
            }

            var startStrokePoint = strokePoints.first!

            for strokePoint in strokePoints {
                let path = PKStrokePath(controlPoints: [startStrokePoint, strokePoint], creationDate: Date())
                strokes.append(PKStroke(ink: ink, path: path))
                startStrokePoint = strokePoint
            }
        }
        print("strokes:\(strokes.count)")
        self.drawing.strokes.append(contentsOf: strokes)
        
        self.undoManager!.registerUndo(withTarget: self, selector: #selector(undoStrocke), object: self.drawing.strokes)
    }
}

@objc func undoStrocke() {
    for _ in 1...5 {
        self.drawing.strokes.removeLast()
    }
}

PKStrokePointのsizeを1.8から2.5で比較