fix format errors about log message from cpp

Samples/UIWidgetsSamples_2019_4/Assets/UIWidgetsExample.cs

  using FontStyle = Unity.UIWidgets.ui.FontStyle;
  using ui_ = Unity.UIWidgets.widgets.ui_;
 
- using AOT;
- using System;
- using System.Runtime.InteropServices;
-
-        public delegate void LogDelegate(IntPtr message, int iSize);
-
-        [DllImport("libUIWidgets_d.dll")]
-        public static extern void InitCSharpDelegate(LogDelegate log);
-
-        //C# Function for C++'s call
-        [MonoPInvokeCallback(typeof(LogDelegate))]
-        public static void LogMessageFromCpp(IntPtr message, int iSize)
-        {
-            Debug.Log(Marshal.PtrToStringAnsi(message, iSize));
-        }
-
         protected void OnEnable() {
             // if you want to use your own font or font icons.
             // FontManager.instance.addFont(Resources.Load<Font>(path: "path to your font"), "font family name");
             // FontManager.instance.addFont(Resources.Load<Font>(path: "path to material icons"), "Material Icons");
 
             // Pass the C# Debug function reference to C++ to save, and then C++ calls C# through the function pointer
-             UIWidgetsExample.InitCSharpDelegate(UIWidgetsExample.LogMessageFromCpp);
-
-             base.OnEnable();
+            NativeConsole.InitLogMessageFromCppDelegate(NativeConsole.LogMessageFromCpp);
+             
+            base.OnEnable();
          }
 
          protected override void main()

engine/src/shell/platform/unity/uiwidgets_log.h

 #include "runtime/mono_api.h"
 
 namespace uiwidgets {
-    //use UnityLog just like printf, and this will output the result to unity
+// use UnityLog just like printf, and this will output the result to unity
-extern "C"
-{
-    class Debug
-    {
-    public:
-        static void (*Log)(char* message,int iSize);
-    };
+extern "C"{
+class Debug{
+ public:
+  static void (*Log)(char* message,int iSize);
+};
-    void (*Debug::Log)(char* message, int iSize);
-    // export c++ function interface for c#
-    UIWIDGETS_API(void) InitCSharpDelegate(void (*Log)(char* message, int iSize)){Debug::Log = Log;}
+  void (*Debug::Log)(char* message, int iSize);
+  // export c++ function interface for c#
+  UIWIDGETS_API(void) 
+  InitLogMessageFromCppDelegate(void (*Log)(char* message, int iSize)){ Debug::Log = Log; }
-
 } // namespace uiwidgets

Samples/UIWidgetsSamples_2019_4/Assets/NativeConsole.cs

+using UnityEngine;
+using AOT;
+using System;
+using System.Runtime.InteropServices;
+
+public static class NativeConsole
+{
+    public delegate void LogDelegate(IntPtr message, int iSize);
+
+    [DllImport("libUIWidgets_d.dll")]
+    public static extern void InitLogMessageFromCppDelegate(LogDelegate log);
+
+    //C# Function for C++'s call
+    [MonoPInvokeCallback(typeof(LogDelegate))]
+    public static void LogMessageFromCpp(IntPtr message, int iSize)
+    {
+        Debug.Log(Marshal.PtrToStringAnsi(message, iSize));
+    }
+
+}
+