显示一些视图，仅当iOS 14、SwiftUI

import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            Text("欢迎来到SwiftUI世界！")
                .font(.largeTitle)
                .fontWeight(.bold)
            
            Button(action: {
                // 按钮点击事件处理
            }) {
                Text("点击我")
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
        }
        .padding()
    }
}

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

import SwiftUI

struct ResponsiveView: View {
    var body: some View {
        GeometryReader { geometry in
            VStack {
                Text("这是一个响应式视图")
                    .frame(width: geometry.size.width * 0.8)
                    .background(Color.gray.opacity(0.2))
                    .cornerRadius(10)
                    .padding()
                
                Spacer()
            }
        }
    }
}