Working with actions in CCSequence using CCCallBlock

cocos2d-x C++
#1

hello,
I am invoking some touch events in my cocos2d-x function , when user touch the screen at some points, the the function CCFadeTO called with one sprite in screen, but after 1 second of time sprite must have to be removed from the parent,
I have cocos2d code here below,

   [sprite runAction:[CCSequence actions:[CCFadeTo actionWithDuration:1.0f opacity:30],[CCCallBlock actionWithBlock:^{ 
            [sprite removeFromParent]; 
                                 }], nil]];

How can i do it in c++?
Thanks…

#2

If you use v3.0, you can do it like this

sprite->runAction(Sequence::create(FadeTo::create(1.0f, 30), 
                                                        CallFunc::create([&sprite]() { sprite->removeFromParent() } ), 
                                                        nullptr 
                            ));

Because on v3.x, we use c++ 11 which supports lambda expression. More about c++ lambda expression please refer to this doc.

#3

Thank you…
But i am using v2.2.3, how can i achieve that in this version, is there any way?

#4

You should modify CallFunc as v3.0 did and enable c++11.

#5

Thank you, i got it,
I will give my first try to use v3.0.

#6

@zhangxm
Edit: its working now I just have to remove & in [&mySprite](){}

Please help me. I have spent a lot of time to get solution for this problem. I’m getting run time error when I use lambda Sequence::create(moveToAction, jumpToAction, Repeat::create(rotateByAction, 2), shakeSequenceAction, CallFunc::create( [&treeSprite]() { treeSprite->setAnchorPoint(Point::ANCHOR_MIDDLE_BOTTOM); } ), nullptr);

I’m using Microsoft Visual Studio Express 2012.
When I click run everything compiled without any errors or warnings. Then the animation that I made played in a sequence but when it comes to CallFunc everything gets broken.
So, I have attached my Classes and Resources folder of my project below.
Call Stack

>	cocosTransAction.exe!<lambda_d946d50cf150b6f2a06611b1bfc025c1>::operator()() Line 78	C++
 	cocosTransAction.exe!std::_Callable_obj<<lambda_d946d50cf150b6f2a06611b1bfc025c1>,0>::_ApplyX<void>() Line 431	C++
 	cocosTransAction.exe!std::_Func_impl<std::_Callable_obj<<lambda_d946d50cf150b6f2a06611b1bfc025c1>,0>,std::allocator<std::_Func_class<void,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil> >,void,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil>::_Do_call() Line 239	C++
 	cocosTransAction.exe!std::_Func_class<void,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil>::operator()() Line 514	C++
 	cocosTransAction.exe!cocos2d::CallFunc::execute() Line 409	C++
 	cocosTransAction.exe!cocos2d::CallFunc::update(float time) Line 400	C++
 	cocosTransAction.exe!cocos2d::Sequence::update(float t) Line 351	C++
 	cocosTransAction.exe!cocos2d::ActionInterval::step(float dt) Line 124	C++
 	cocosTransAction.exe!cocos2d::ActionManager::update(float dt) Line 361	C++
 	cocosTransAction.exe!<lambda_1a2251fe36a4365aacfd6988cf1fc601>::operator()(float dt) Line 248	C++
 	cocosTransAction.exe!std::_Callable_obj<<lambda_1a2251fe36a4365aacfd6988cf1fc601>,0>::_ApplyX<void,float>(float && _V0) Line 431	C++
 	cocosTransAction.exe!std::_Func_impl<std::_Callable_obj<<lambda_1a2251fe36a4365aacfd6988cf1fc601>,0>,std::allocator<std::_Func_class<void,float,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil> >,void,float,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil>::_Do_call(float && _V0) Line 239	C++
 	cocosTransAction.exe!std::_Func_class<void,float,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil,std::_Nil>::operator()(float _Vx0) Line 515	C++
 	cocosTransAction.exe!cocos2d::Scheduler::update(float dt) Line 838	C++
 	cocosTransAction.exe!cocos2d::Director::drawScene() Line 275	C++
 	cocosTransAction.exe!cocos2d::DisplayLinkDirector::mainLoop() Line 1101	C++
 	cocosTransAction.exe!cocos2d::Application::run() Line 92	C++
 	cocosTransAction.exe!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow) Line 17	C++
 	cocosTransAction.exe!__tmainCRTStartup() Line 528	C
 	cocosTransAction.exe!wWinMainCRTStartup() Line 377	C
 	kernel32.dll!7699919f()	Unknown
 	[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]	
 	ntdll.dll!771aa8cb()	Unknown
 	ntdll.dll!771aa8a1()	Unknown

enter image description here
oaIzo.jpg1121×749

#7

Sorry.
Its my fault. Can not use reference here, because the parameter being referenced is destroyed when it is used in CallFunc. So you should use it like this

CallFunc::create([treeSprite]() { ... })   // capture by value, not by reference
#8

Hello zhangxm

What is wrong with this code please

sprite->runAction(CCSequence::create(cocos2d::Repeat::create(animate, 1), drive() , NULL));

Where drive() is a fucntion in this class

Here are the two functions I am using in my Vehicle Class

void Vehicle::drive()//DRIVE
{
	for (int i = 0; i < 2; i++)
	{
		auto frame = SpriteFrame::create("Ship/VehicleOne/drive.png", Rect(90 * i / TIscale, 0 / TIscale, 90 / TIscale, 30 / TIscale));
		animationFrames.pushBack(frame);
	}
	auto animation = Animation::createWithSpriteFrames(animationFrames, 0.1f);
	auto animate = Animate::create(animation);
	sprite->runAction(RepeatForever::create(animate));
}

void Vehicle::accelerate()//ACCELERATE
{
	for (int i = 0; i < 6; i++)
	{
		auto frame = SpriteFrame::create("Ship/VehicleOne/accelerate.png", Rect(90 * i / TIscale, 0 / TIscale, 90 / TIscale, 30 / TIscale));
		animationFrames.pushBack(frame);
	}
	auto animation = Animation::createWithSpriteFrames(animationFrames, 0.1f);
	auto animate = Animate::create(animation);
	sprite->runAction(Repeat::create(animate, 1));

	sprite->runAction(CCSequence::create(cocos2d::Repeat::create(animate, 1), drive(),  NULL));
}
#9

@GaddMaster what’s your issue? I don’t quite understand.

1 Like
#10

sprite->runAction(CCSequence::create(cocos2d::repeat::create(animate, 1), Callfunc::create(CC_CALLBACK_0(Vehicle::Drive,this)), NULL));

1 Like