导入R3，简单实现数据绑定UI，以及双向绑定

Assets/Boot.unity

@@ -292,7 +292,7 @@ GameObject:
   m_Component:
   - component: {fileID: 251580318}
   m_Layer: 5
-  m_Name: Mi
+  m_Name: Medium
   m_TagString: Untagged
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
@@ -654,8 +654,6 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: beb122424f267994cb04b5ba15d3f694, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  MainUICanvas: {fileID: 1171471944}
-  UICamera: {fileID: 124489897}
   MainCamera: {fileID: 330585545}
   PlayMode: 2
 --- !u!4 &1019312449
@@ -760,6 +758,7 @@ GameObject:
   - component: {fileID: 1171471947}
   - component: {fileID: 1171471946}
   - component: {fileID: 1171471945}
+  - component: {fileID: 1171471949}
   m_Layer: 5
   m_Name: MainUICanvas
   m_TagString: Untagged
@@ -853,6 +852,23 @@ RectTransform:
   m_AnchoredPosition: {x: 0, y: 0}
   m_SizeDelta: {x: 0, y: 0}
   m_Pivot: {x: 0, y: 0}
+--- !u!114 &1171471949
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1171471944}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: a47ab17bc3d41694286b14a1c6cd2782, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  InitBg: {fileID: 1144573926}
+  Top: {fileID: 1592395654}
+  Medium: {fileID: 251580318}
+  Bottom: {fileID: 246745093}
+  UICamera: {fileID: 124489897}
 --- !u!1001 &1399142585
 PrefabInstance:
   m_ObjectHideFlags: 0