添加注释，部分优化

Runt

2022-08-13 b3a51f064c4dfb27f54cd9526803338d2e8dc296

 app/src/main/res/layout/activity_login.xml

@@ -9,7 +9,8 @@
    <com.runt.open.mvvm.widgets.TitleBarView
        android:id="@+id/title_bar"
        style="@style/titlebar"
        app:leftDrawable="@mipmap/ic_arrow_back_black_24dp"
        app:leftDrawable="@mipmap/icon_white_back"
        app:leftTint="@color/txt_normal"
        app:titleText="登录"
        tools:ignore="MissingConstraints" />