Reload values for draw circle - swift

Question

Hi I'm creating a semicircle that updates your line widh depending on the values I give you that are always varying. I want to know how to update the values to determine the end angle and that these are always updated. Thanks
class Circle: UIView {
//These 2 var (total dictionary and Secondary dictionary) have the number of the keys and the values ​​are always varying because they are obtained from json data
var dictionaryTotal: [String:String] = ["a":"153.23", "b":"162.45", "c":"143.65", "d":"140.78", "e":"150.23"]
var dictionarySecundario: [String:String] = ["w":"153.23", "l":"162.45", "v":"143.65"]
var lineWidth: CGFloat = 25
// circles radius
var half = CGFloat.pi
var quarter = CGFloat(3 * CGFloat.pi / 2)
func drawCircleCenteredAtVariavel(center:CGPoint, withRadius radius:CGFloat) -> UIBezierPath{
let circlePath = UIBezierPath(arcCenter: centerOfCircleView, radius: halfOfViewsSize, startAngle: half, endAngle: CGFloat(((CGFloat(self.dictionarySecundario.count) * CGFloat.pi) / CGFloat(self. dictionaryTotal.count)) + CGFloat.pi), clockwise: true)
circlePath.lineWidth = lineWidth
UIColor(red: 0, green: 0.88, blue: 0.70, alpha: 1).set()
return circlePath
}
override func draw(_ rect: CGRect) {
drawCircleCenteredAtVariavel(center: centerOfCircleView, withRadius: halfOfViewsSize).stroke()
}
}
This is the picture of semicircle

Answer 1

It's not clear from your question what you're trying to accomplish, so this isn't really answer, but it's more than I wanted to type in a comment.
The first thing you should do is separate responsibilities in so the Circle class above should only be responsible for drawing the semicircle for a particular configuration.
For example, a semicircular progress view based on your code above:
class CircleProgressView: UIView {
var lineWidth: CGFloat = 25
var barColor = UIColor(red: 0, green: 0.88, blue: 0.70, alpha: 1)
var progress: Float = 0
{
didSet {
progress = max(min(progress, 1.0), 0.0)
setNeedsDisplay()
}
}
func semicirclePath(at center: CGPoint, radius: CGFloat, percentage: Float) -> UIBezierPath {
let endAngle = CGFloat.pi + (CGFloat(percentage) * CGFloat.pi)
let circlePath = UIBezierPath(arcCenter: center, radius: radius, startAngle: CGFloat.pi, endAngle: endAngle, clockwise: true)
circlePath.lineWidth = lineWidth
return circlePath
}
override func draw(_ rect: CGRect) {
barColor.set()
let center = CGPoint.init(x: bounds.midX, y: bounds.midY)
let radius = max(bounds.width, bounds.height)/2 - lineWidth/2
semicirclePath(at: center, radius: radius, percentage: progress).stroke()
}
}
Then, outside of this class, you would have other code that would determine what progress is based on the JSON values you're receiving.

Answer 2

Assuming that your drawCircleCenteredAtVariavel works, you should redraw whenever the lineWidth value is changed. Try this
var lineWidth: CGFloat = 25 {
didSet {
setNeedsDisplay()
}
}
override func draw(_ rect: CGRect) {
super.draw(rect)
drawCircleCenteredAtVariavel(center: centerOfCircleView, withRadius: halfOfViewsSize).stroke()
}