CCActionTween（可以时间上连续的改变某个对象指定key对应的属性 改变方式需要自定义 cocos2dx未定义 ）

#ifndef __CCACTIONTWEEN_H__
#define __CCACTIONTWEEN_H__

///怎么通过精灵属性得到相应值啊 ？？？？？？？？


#include "CCActionInterval.h"

NS_CC_BEGIN

class CC_DLL CCActionTweenDelegate
{
public: //太不规范了 不写构造函数（虽然会隐式声明）！！！！！！！！！！！！！！！！！！！！！！！！！！
virtual ~CCActionTweenDelegate() {}
virtual void updateTweenAction(float value, const char* key) = 0;
};

/** CCActionTween

CCActionTween is an action that lets you update any property of an object

//.ActionTween 是一个 action 让允许你更新任何对象的属性

For example, if you want to modify the "width" property of a target from 200 to 300 in 2 seconds, then:

id modifyWidth = [CCActionTween actionWithDuration:2 key:@"width" from:200 to:300];
[target runAction:modifyWidth];

Another example: CCScaleTo action could be rewritten using CCPropertyAction:

// scaleA and scaleB are equivalents
id scaleA = [CCScaleTo actionWithDuration:2 scale:3];
id scaleB = [CCActionTween actionWithDuration:2 key:@"scale" from:1 to:3];

@since v0.99.2
*/
class CC_DLL CCActionTween : public CCActionInterval
{
public:
/** creates an initializes the action with the property name (key), and the from and to（从xx到） parameters(参数). */
static CCActionTween* create(float aDuration, const char* key, float from, float to);
/** initializes the action with the property name (key), and the from and to parameters. */
bool initWithDuration(float aDuration, const char* key, float from, float to);

void startWithTarget(CCNode *pTarget);
void update(float dt);
CCActionInterval* reverse();

std::string m_strKey;
float m_fFrom, m_fTo;
float m_fDelta;
};

// end of actions group
/// @}

NS_CC_END

#endif /* __CCACTIONTWEEN_H__ */

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.cpp

void CCActionTween::startWithTarget(CCNode *pTarget)

{

CCAssert(dynamic_cast<CCActionTweenDelegate*>(pTarget), "target must implement CCActionTweenDelegate");

CCActionInterval::startWithTarget(pTarget);

m_fDelta = m_fTo - m_fFrom;

}

void CCActionTween::update(float dt)

{

dynamic_cast<CCActionTweenDelegate*>(m_pTarget)->updateTweenAction(m_fTo - m_fDelta * (1 - dt), m_strKey.c_str());

}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

例子：

class originalTargeted

{

public:

originalTargeted(){ m_map["width"] = 18; }

~originalTargeted(){}

map<string, int> m_map;

};

class CCActionTweenDelegate02 :public cocos2d::CCActionTweenDelegate, public cocos2d::CCNode

{

public:

CCActionTweenDelegate02(originalTargeted* d){ ot = d; }

virtual ~CCActionTweenDelegate02() {}

virtual void updateTweenAction(float value, const char* key);

originalTargeted* ot;

};

_____________________________

main()

{

originalTargeted* test = new originalTargeted;

CCActionTweenDelegate02* s = new CCActionTweenDelegate02(test);

CCActionTween* testaction = CCActionTween::create(2, "width", 1, 2);

s->runAction(testaction);

testaction->update(1); //？？？为什么runaction 不执行update

}

void CCActionTweenDelegate02::updateTweenAction(float value, const char* key)

{

this->ot->m_map[key] = 12;

}