Needle.swift

struct Needle: Shape {
    func path(in rect: CGRect) -> Path {
        var path = Path()
        path.move(to: CGPoint(x: 0, y: rect.height/2))
        path.addLine(to: CGPoint(x: rect.width, y: 0))
        path.addLine(to: CGPoint(x: rect.width, y: rect.height))
        return path
    }
}

struct GaugeView: View {
   
    let coveredRadius: Double // 0 - 360°
    let maxValue: Int
    let steperSplit: Int
    
    private var tickCount: Int {
        return maxValue/steperSplit
    }
    
    @Binding var value: Double
    var body: some View {
        ZStack {
            Text("\(value, specifier: "%0.0f")")
                .font(.system(size: 40, weight: Font.Weight.bold))
                .foregroundColor(Color.orange)
                .offset(x: 0, y: 40)
            Needle()
                .fill(Color.red)
                .frame(width: 140, height: 6)
                .offset(x: -70, y: 0)
                .rotationEffect(.init(degrees: getAngle(value: value)), anchor: .center)
                .animation(.linear)
            Circle()
                .frame(width: 20, height: 20)
                .foregroundColor(.red)
        }.frame(width: 300, height: 300, alignment: .center)
    }
    
    func getAngle(value: Double) -> Double {
        return (value/Double(maxValue))*coveredRadius - coveredRadius/2 + 90
    }
}