Fixed #9382 : ui::ListView->getCurSelectedIndex() is out of range.

cocos/ui/UIListView.cpp

@@ -35,7 +35,7 @@ ListView::ListView():
 _model(nullptr),
 _gravity(Gravity::CENTER_VERTICAL),
 _itemsMargin(0.0f),
-_curSelectedIndex(0),
+_curSelectedIndex(-1),
 _refreshViewDirty(true),
 _listViewEventListener(nullptr),
 _listViewEventSelector(nullptr),
@@ -230,14 +230,7 @@ void ListView::insertDefaultItem(ssize_t index)
     {
         return;
     }
-    Widget* newItem = _model->clone();
+    insertCustomItem(_model->clone(), index);
-    
-    _items.insert(index, newItem);
-    ScrollView::addChild(newItem);
-
-    remedyLayoutParameter(newItem);
-    
-    _refreshViewDirty = true;
 }
 
 
@@ -285,6 +278,18 @@ void ListView::removeChild(cocos2d::Node *child, bool cleaup)
     Widget* widget = dynamic_cast<Widget*>(child);
     if (nullptr != widget)
     {
+        if (-1 != _curSelectedIndex)
+        {
+            auto removedIndex = getIndex(widget);
+            if (_curSelectedIndex > removedIndex)
+            {
+                _curSelectedIndex -= 1;
+            }
+            else if (_curSelectedIndex == removedIndex)
+            {
+                _curSelectedIndex = -1;
+            }
+        }
         _items.eraseObject(widget);
     }
    
@@ -300,10 +305,18 @@ void ListView::removeAllChildrenWithCleanup(bool cleanup)
 {
     ScrollView::removeAllChildrenWithCleanup(cleanup);
     _items.clear();
+    _curSelectedIndex = -1;
 }
 
 void ListView::insertCustomItem(Widget* item, ssize_t index)
 {
+    if (-1 != _curSelectedIndex)
+    {
+        if (_curSelectedIndex >= index)
+        {
+            _curSelectedIndex += 1;
+        }
+    }
     _items.insert(index, item);
     ScrollView::addChild(item);