如何使用Jetpack compose app bar bar按钮

@Composable
fun MyApp() {
    Scaffold(
        topBar = {
            TopAppBar(
                title = { Text(text = "My App") },
                navigationIcon = {
                    IconButton(onClick = { /* 处理导航按钮点击事件 */ }) {
                        Icon(Icons.Default.Menu, contentDescription = "导航按钮")
                    }
                },
                actions = {
                    IconButton(onClick = { /* 处理操作按钮点击事件 */ }) {
                        Icon(Icons.Default.Search, contentDescription = "搜索按钮")
                    }
                }
            )
        },
        content = {
            // 应用程序内容
        }
    )
}