Merge pull request #222 from Unity-Technologies/fix_runtime_debug

Fix runtime debug

README-ZH.md

 
 ## 调试UIWidgets应用程序
 
-在编辑器菜单栏选择```UIWidgets->EnableDebug```
+在Editor模式下，编辑器菜单栏选择```UIWidgets->EnableDebug```。
-如果想在runtime开启debug模式，请在项目代码中设置```UIWidgetsGlobalConfiguration.EnableDebugAtRuntime = true```。在默认情况下debug模式为关闭状态。
+在Runtime模式下，Debug/Development build会自动开启Debug，Release build则会自动关闭Debug。
 
 ## 使用Window Scope保护外部调用
 如果您在调试时遇到 `AssertionError: Window.instance is null` 或者在调用 `Window.instance` 时得到空指针, 那么您需要

README.md

 
 ## Debug UIWidgets Application
 
-In Unity editor, you can switch debug/release mode by “UIWidgets->EnableDebug”.
+In the Editor, you can switch debug/release mode by “UIWidgets->EnableDebug”.
-You can also enable debug mode in runtime by setting ```UIWidgetsGlobalConfiguration.EnableDebugAtRuntime = true``` in your project. Note that this value is set to false by default.
+In the Player, the debug/development build will enable debug mode. The release build will disable debug mode automatically.
 
 ## Using Window Scope
 If you see the error `AssertionError: Window.instance is null` or null pointer error of `Window.instance`,

com.unity.uiwidgets/Runtime/engine/UIWidgetsGlobalConfiguration.cs

 
         //disable incremental gc by default
         public static bool EnableIncrementalGC = false;
-        
-        //disable debug at runtime by default
-        public static bool EnableDebugAtRuntime = false;
     }
 }

com.unity.uiwidgets/Runtime/foundation/debug.cs

 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using Unity.UIWidgets.engine;
                 throw new AssertionError(message != null ? message() : "");
             }
         }
+        
         [Conditional("UNITY_ASSERTIONS")]
         public static void assert(bool result, Func<string> message = null) {
             if ( enableDebug && !result ) {
 
 #if UNITY_EDITOR
         static bool? _enableDebug = null;
+
         public static bool enableDebug {
             get {
                 if (_enableDebug == null) {
             }
         }
 #else
-        public static bool enableDebug => UIWidgetsGlobalConfiguration.EnableDebugAtRuntime;
+        //In the runtime, we use the Conditional decorator instead of this to enable/disable debug mode
+        //The rule is simple: the debug mode is on for Debug/Development build, and is off for Release build
+        public static bool enableDebug => true;
 #endif
 
         public static void _debugDrawDoubleRect(Canvas canvas, Rect outerRect, Rect innerRect, Color color) {