How tom Show 3D pie-chart in swift 4 in my app - ios

Question

I am trying to show a 3D pie-chart in my app in swift 4.
but can't find any solution.does anyone help me or give me any suggestion please??

Answer 1

private func createPieChart() -> SCNNode {
let aNode = SCNNode()
var total:Float = 0.0
//let numRows = data.numberOfRows()
let numColumns = data.numberOfColums()
let i = 0
for j in 0 ..< numColumns {
let val = data.valueForIndexPath(row:i, column: j)
total = total + val
}
var startDeg:Float = 0.0
var startRad:Float = 0.0
for j in 0 ..< numColumns {
let val = data.valueForIndexPath(row:i, column: j)
let pct = val*360.0/total
startRad = Float(startDeg) * Float(M_PI) / Float(180.0)
let endDeg = startDeg + pct - 1.0
let endRad:Float = Float(endDeg) * Float(M_PI) / Float(180.0)
let circlePath = UIBezierPath()
circlePath.move(to: CGPoint.zero)
circlePath.addArc(withCenter: CGPoint.zero, radius: 20.0, startAngle:CGFloat(startRad), endAngle: CGFloat(endRad), clockwise: true)
startDeg = endDeg + 1
let node = SCNNode(geometry: SCNShape(path:circlePath, extrusionDepth: 5.0))
node.geometry?.firstMaterial?.diffuse.contents = data.colorForIndexPath(row: i, column: j)
aNode.addChildNode(node)
}
return aNode
}