添加注释

app/src/main/java/com/sw/platecabinet/activity/MainActivity.kt

@@ -15,6 +15,9 @@ import com.sw.platecabinet.utils.FragmentHelper
 
 typealias Callback = (String) -> Unit
 
+/**
+ * 主界面，内部嵌套framgnet使用
+ */
 class MainActivity : BaseActivity<ActivityMainBinding>() {
     private lateinit var fragmentHelper: FragmentHelper
     private var pageType = PageType.SETTING_LIST