[iOS] Add scene type for rich text.
diff --git a/ios/sdk/WeexSDK/Sources/Component/WXRichText.mm b/ios/sdk/WeexSDK/Sources/Component/WXRichText.mm
index 8e30d76..e796009 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXRichText.mm
+++ b/ios/sdk/WeexSDK/Sources/Component/WXRichText.mm
@@ -437,6 +437,11 @@
     }
 }
 
+- (WXColorScene)colorSceneType
+{
+    return WXColorSceneText;
+}
+
 #pragma mark Text Building
 
 - (NSMutableAttributedString *)buildAttributeString
diff --git a/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm b/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
index 16de3c6..3b1b116 100644
--- a/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
+++ b/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
@@ -389,7 +389,9 @@
         _view = [self loadView];
         
         // Provide a chance for dark theme handler to process the view
-        [[WXSDKInstance darkThemeColorHandler] configureView:_view ofComponent:self];
+        if ([WXUtility isDarkThemeSupportEnabled]) {
+            [[WXSDKInstance darkThemeColorHandler] configureView:_view ofComponent:self];
+        }
         
 #ifdef DEBUG
         WXLogDebug(@"flexLayout -> loadView:addr-(%p),componentRef-(%@)",_view,self.ref);