如何在SWIFT UI的主体中运行函数？

import SwiftUI

struct ContentView: View {
    @State private var count = 0
    
    func increaseCount() {
        count += 1
    }
    
    var body: some View {
        VStack {
            Text("Count: \(count)")
                .font(.largeTitle)
            
            Button(action: increaseCount) {
                Text("Increase Count")
                    .font(.title)
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
        }
    }
}

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