开发：最多支持n+1个状态

statusConfig.cpp

@@ -285,7 +285,7 @@ void StatusConfig::on_pushButton_addStatus_clicked()
 {
     int maxLayer = DataManager::getInstance()->getMaxLayer(currentElem).toInt();
     QString statusName;
-    for(int i=0;i<maxLayer;i++){
+    for(int i=0;i<=maxLayer;i++){
         if(!DataManager::getInstance()->existStatusVal(currentElem,QString::number(i))){
             statusName = QString::number(i);
             break;