I'm working on drawing a pie chart using SwiftUI.
My current code is working by drawing a circle with a radius based on the center of the circle, and filling each pie slice with a corresponding color.
However, I am having a problem with the boundaries of each section of the pie chart being drawn as straight lines ("| | |").
What I want is for these boundaries to be drawn in a circular fashion, meaning I want to draw a circle of small radius at the end of each section.
My current code looks like this
private func drawPieSlice(context: GraphicsContext, size: CGSize) {
let total = data.reduce(0) { $0 + $1.0 }
let radius = min(size.width, size.height) * 0.4
let center = CGPoint(x: size.width * 0.5, y: size.height * 0.5)
var startAngle = Angle.zero
for (value, color) in data {
let angle = Angle(degrees: 360 * (value / total))
let endAngle = startAngle + angle
let path = Path { path in
path.move(to: center)
path.addArc(center: center, radius: radius, startAngle: startAngle, endAngle: endAngle, clockwise: false)
path.closeSubpath()
}
context.fill(path, with: .color(color))
startAngle = endAngle
}
}
How can I solve this problem, and how should I implement drawing a small circle at the beginning and end of each section?
Any suggestions would be appreciated.
