ボタンのスタイルの変更

ContentView.swift

import SwiftUI

struct ContentView: View {

    var body: some View {
        VStack(spacing: 20) {
            Button(action: {}) {
                Text("Button").font(.title)
            }
            .buttonStyle(DefaultButtonStyle())
            
            Button(action: {}) {
                Text("Button").font(.title)
            }
            .buttonStyle(BorderlessButtonStyle())
            
            Button(action: {}) {
                Text("Button").font(.title)
            }
            .buttonStyle(PlainButtonStyle())
        }
    }
}

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