如何使用SwiftUI在函数中初始化警报？

@State private var showAlert = false

func showAlert() {
    // 根据条件设置showAlert的值
    showAlert = true
}

struct ContentView: View {
    @State private var showAlert = false
    
    var body: some View {
        Button(action: {
            showAlert()
        }) {
            Text("显示警报")
        }
        .alert(isPresented: $showAlert) {
            Alert(title: Text("警报标题"), message: Text("警报消息"), dismissButton: .default(Text("确定")))
        }
    }
}