Warning message appearing in logs caused by ui::ScrollViewBar::onEnter

[rh101]

• cocos2d-x version: 3.16
• devices test on: Win32
• developing environments
  • NDK version:
  • Xcode version:
  • VS version: 2017
  • browser type and version:

Steps to Reproduce:

1. Add a ui::ScrollView to a scene, push the scene into the stack, then pop it back.

2. This warning comes up in the logs every time the scene is popped back:

        "warning: don't update it again"
   

It is caused by scheduleUpdate being called from within ui::ScrollViewBar::onEnter(). It's not a big issue, just annoying to see it in the logs, and given that it is in the core cocos2dx code, there is little I can do about it. Is the warning really necessary? schedulePerFrame is already doing the relevant checks, and the warning seems redundant.

Here is a stack trace:

 	libcocos2d.dll!cocos2d::Scheduler::schedulePerFrame(const std::function<void __cdecl(float)> & callback, void * target, int priority, bool paused) Line 476	C++
 	libcocos2d.dll!cocos2d::Scheduler::scheduleUpdate<cocos2d::Node>(cocos2d::Node * target, int priority, bool paused) Line 286	C++
 	libcocos2d.dll!cocos2d::Node::scheduleUpdateWithPriority(int priority) Line 1518	C++
 	libcocos2d.dll!cocos2d::Node::scheduleUpdate() Line 1513	C++
	libcocos2d.dll!cocos2d::ui::ScrollViewBar::onEnter() Line 182	C++
 	libcocos2d.dll!cocos2d::ProtectedNode::onEnter() Line 350	C++
 	libcocos2d.dll!cocos2d::ui::Widget::onEnter() Line 239	C++
 	libcocos2d.dll!cocos2d::ui::Layout::onEnter() Line 104	C++
 	libcocos2d.dll!cocos2d::ui::ScrollView::onEnter() Line 115	C++
 	libcocos2d.dll!cocos2d::Node::onEnter() Line 1313	C++
 	libcocos2d.dll!cocos2d::ProtectedNode::onEnter() Line 349	C++
 	libcocos2d.dll!cocos2d::ui::Widget::onEnter() Line 239	C++
 	libcocos2d.dll!cocos2d::ui::Layout::onEnter() Line 104	C++
 	libcocos2d.dll!cocos2d::Node::onEnter() Line 1313	C++
 	libcocos2d.dll!cocos2d::Node::onEnter() Line 1313	C++
 	libcocos2d.dll!cocos2d::Director::setNextScene() Line 1176	C++
 	libcocos2d.dll!cocos2d::Director::drawScene() Line 291	C++
 	libcocos2d.dll!cocos2d::Director::mainLoop() Line 1446	C++
 	libcocos2d.dll!cocos2d::Application::run() Line 112	C++