在SwiftUI中根据手指位置选择最近的按钮

import SwiftUI

struct ContentView: View {
    @State private var selectedButton: String = ""
    @State private var buttons = ["Button 1", "Button 2", "Button 3"]
    @State private var fingerLocation: CGPoint = .zero
    
    var body: some View {
        VStack {
            ForEach(buttons, id: \.self) { button in
                Button(action: {
                    selectedButton = button
                }) {
                    Text(button)
                        .padding()
                        .background(selectedButton == button ? Color.blue : Color.gray)
                        .foregroundColor(.white)
                        .cornerRadius(10)
                }
            }
        }
        .gesture(
            DragGesture()
                .onChanged { value in
                    fingerLocation = value.location
                    selectedButton = findNearestButton()
                }
        )
    }
    
    func findNearestButton() -> String {
        var nearestButton = ""
        var minDistance = CGFloat.infinity
        
        for button in buttons {
            let buttonLocation = buttonPosition(button)
            let distance = fingerLocation.distance(to: buttonLocation)
            
            if distance < minDistance {
                minDistance = distance
                nearestButton = button
            }
        }
        
        return nearestButton
    }
    
    func buttonPosition(_ button: String) -> CGPoint {
        // 根据按钮的位置计算方法，返回按钮的中心点位置
        // 这里可以根据实际情况进行计算，例如使用按钮的frame属性等
        return .zero
    }
}

extension CGPoint {
    func distance(to point: CGPoint) -> CGFloat {
        let dx = self.x - point.x
        let dy = self.y - point.y
        return sqrt(dx * dx + dy * dy)
    }
}