1 snackbar

onTap: () => Get.snackbar(
                "标题",
                "消息",
              ),

2 Dialog

onTap: () => Get.defaultDialog(
  title: "标题",
  content: Column(
    children: [
      Text("第1行"),
      Text("第2行"),
      Text("第3行"),
    ],
  ),
  textConfirm: "确认",
  textCancel: "取消",
  onConfirm: () => Get.back(),
),

3 BottomSheet

onTap: () => Get.bottomSheet(
    Container(
        height: 200,
        color: Colors.white,
        child: Column(
            children: [
                Text("第1行"),
                Text("第2行"),
                Text("第3行"),
            ],
        ),
    ),
              ),