SwiftUI -四舍五入textField

import SwiftUI

struct ContentView: View {
    @State private var inputValue: String = ""
    @State private var roundedValue: Double = 0.0
    
    var body: some View {
        VStack {
            TextField("请输入一个数值", text: $inputValue)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .padding()
            
            Button(action: {
                if let value = Double(inputValue) {
                    roundedValue = value.rounded()
                }
            }) {
                Text("四舍五入")
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
            
            Text("四舍五入结果: \(roundedValue)")
                .padding()
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}