如何在SwiftUI中创建环形

import SwiftUI

struct RingShape: Shape {
    var progress: Double
    
    func path(in rect: CGRect) -> Path {
        var path = Path()
        
        let center = CGPoint(x: rect.width / 2, y: rect.height / 2)
        let radius = min(rect.width, rect.height) / 2
        let startAngle = Angle(degrees: -90)
        let endAngle = Angle(degrees: (360 * progress) - 90)
        
        path.addArc(center: center, radius: radius, startAngle: startAngle, endAngle: endAngle, clockwise: false)
        
        return path
    }
}

struct ContentView: View {
    @State private var progress: Double = 0.5
    
    var body: some View {
        VStack {
            ZStack {
                RingShape(progress: progress)
                    .stroke(Color.blue, lineWidth: 20)
                    .aspectRatio(contentMode: .fit)
                
                Text("\(Int(progress * 100))%")
                    .font(.largeTitle)
                    .bold()
            }
            
            Slider(value: $progress, in: 0...1, step: 0.01)
                .padding()
        }
    }
}