Handle initialTabIndex in AppStyle and TabStyle

android/app/src/main/java/com/reactnativenavigation/layouts/BottomTabsLayout.java

 import com.reactnativenavigation.events.EventBus;
 import com.reactnativenavigation.events.ScreenChangedEvent;
 import com.reactnativenavigation.params.ActivityParams;
+import com.reactnativenavigation.params.AppStyle;
 import com.reactnativenavigation.params.ContextualMenuParams;
 import com.reactnativenavigation.params.FabParams;
 import com.reactnativenavigation.params.LightBoxParams;
     }
 
     private void setInitialTabIndex() {
-        if (params.initialTabIndex == null) {
-            return;
-        }
-        bottomTabs.setCurrentItem(params.initialTabIndex);
+        bottomTabs.setCurrentItem(AppStyle.appStyle.bottomTabsInitialIndex);
     }
 
     private void createSideMenu() {

android/app/src/main/java/com/reactnativenavigation/params/ActivityParams.java

     public List<ScreenParams> tabParams;
     public SideMenuParams leftSideMenuParams;
     public SideMenuParams rightSideMenuParams;
-    public Integer initialTabIndex;
     public boolean animateShow;
 }

android/app/src/main/java/com/reactnativenavigation/params/StyleParams.java

 
     public Color snackbarButtonColor;
 
+    public int bottomTabsInitialIndex;
     public boolean bottomTabsHidden;
     public boolean bottomTabsHiddenOnScroll;
     public Color bottomTabsColor;

android/app/src/main/java/com/reactnativenavigation/params/parsers/ActivityParamsParser.java

         }
 
         result.animateShow = params.getBoolean("animateShow", true);
-        result.initialTabIndex = params.getInt("initialTabIndex");
 
         return result;
     }

android/app/src/main/java/com/reactnativenavigation/params/parsers/StyleParamsParser.java

 
         result.screenBackgroundColor = getColor("screenBackgroundColor", getDefaultScreenBackgroundColor());
 
+        result.bottomTabsInitialIndex = getInt("initialTabIndex", 0);
         result.bottomTabsHidden = getBoolean("bottomTabsHidden", getDefaultBottomTabsHidden());
         result.drawScreenAboveBottomTabs = !result.bottomTabsHidden &&
                                            params.getBoolean("drawScreenAboveBottomTabs", getDefaultDrawScreenAboveBottomTabs());

ios/RCCTabBarController.m

   // replace the tabs
   self.viewControllers = viewControllers;
 
-  
-   NSUInteger *initialTabIndex = [props[@"initialTabIndex"] unsignedIntegerValue];
-   if (initialTabIndex && initialTabIndex < viewControllers.count) {
-      [self setSelectedIndex:initialTabIndex];
-   }
+  NSNumber *initialTab = tabsStyle[@"initialTabIndex"];
+  if (initialTab)
+  {
+    NSInteger initialTabIndex = initialTab.integerValue;
+    [self setSelectedIndex:initialTabIndex];
+  }
   
   [self setRotation:props];
   

src/deprecated/platformSpecificDeprecated.android.js

 
     drawScreenAboveBottomTabs: !originalStyleObject.drawUnderTabBar,
 
+    initialTabIndex: originalStyleObject.initialTabIndex,
     bottomTabsColor: processColor(originalStyleObject.tabBarBackgroundColor),
     bottomTabsButtonColor: processColor(originalStyleObject.tabBarButtonColor),
     bottomTabsSelectedButtonColor: processColor(originalStyleObject.tabBarSelectedButtonColor),