SwiftUI中的拖动分隔符

struct ContentView: View {
    @State private var width: CGFloat = 200
    
    var body: some View {
        HStack {
            Rectangle()
                .frame(width: width, height: 200)
                .foregroundColor(.blue)
            
            Divider()
                .gesture(DragGesture()
                            .onChanged { value in
                                self.width = value.location.x
                            }
                )
            
            Rectangle()
                .frame(width: 300 - width, height: 200)
                .foregroundColor(.red)
        }
    }
}