[cocos2dx 3.x]Label类数字变化动作

之前写了个2.14版本的动作变化，见 http://www.cnblogs.com/creeper/p/3531304.html

3.x版本变化了很多，但是核心思想还是没有变化，所以对应3.x版本的改了一下放上来

有空的话把tolua的转换方法也放上来吧:)

 1 #ifndef __MISC_NODE_CCNUMBER_CHANGE_H__
 2 #define __MISC_NODE_CCNUMBER_CHANGE_H__
 3 
 4 #include <vector>
 5 
 6 #include "2d/CCAction.h"
 7 #include "2d/CCAnimation.h"
 8 #include "2d/CCActionInterval.h"
 9 #include "base/CCProtocols.h"
10 #include "base/CCVector.h"
11 
12 //NS_CC_BEGIN
13 USING_NS_CC;
14 class Node;
15 class SpriteFrame;
16 class EventCustom;
17 
18 
19 class NumberChange : public ActionInterval
20 {
21 public:
22 
23     static NumberChange* create(float duration, int fromNum, int toNum);
24 
25     virtual NumberChange* clone() const override;
26     virtual NumberChange* reverse(void) const  override;
27     virtual void startWithTarget(cocos2d::Node *target) override;
28     virtual void update(float time) override;
29     
30 CC_CONSTRUCTOR_ACCESS:
31     NumberChange();
32     virtual ~NumberChange();
33 
34     /** initializes the action */
35     bool initWithDuration(float duration, int fromNum, int toNum);
36 
37 protected:
38     int _fromNum;
39     int _toNum;
40 
41 private:
42     CC_DISALLOW_COPY_AND_ASSIGN(NumberChange);
43 };
44 
45 //NS_CC_END
46 
47 #endif //__MISC_NODE_CCNUMBER_CHANGE_H__

 

 1 #include "2d/CCActionInterval.h"
 2 
 3 #include <stdarg.h>
 4 
 5 #include "2d/CCSprite.h"
 6 #include "2d/CCNode.h"
 7 #include "2d/CCSpriteFrame.h"
 8 #include "2d/CCActionInstant.h"
 9 #include "base/CCDirector.h"
10 #include "base/CCEventCustom.h"
11 #include "base/CCEventDispatcher.h"
12 #include "platform/CCStdC.h"
13 #include "deprecated/CCString.h"
14 #include "NumberChange.h"
15 
16 USING_NS_CC;
17 //NS_CC_BEGIN
18 NumberChange::NumberChange(){
19 }
20 
21 NumberChange::~NumberChange(){
22 }
23 
24 NumberChange* NumberChange::create(float duration, int fromNum, int toNum)
25 {
26     NumberChange *ret = new (std::nothrow) NumberChange();
27     ret->initWithDuration(duration, fromNum, toNum);
28     ret->autorelease();
29 
30     return ret;
31 }
32 
33 
34 bool NumberChange::initWithDuration(float duration, int fromNum, int toNum)
35 {
36     if (ActionInterval::initWithDuration(duration))
37     {
38         _fromNum = fromNum;
39         _toNum = toNum;
40         return true;
41     }
42 
43     return false;
44 }
45 
46 NumberChange* NumberChange::clone() const
47 {
48     // no copy constructor
49     auto a = new (std::nothrow) NumberChange();
50     a->initWithDuration(_duration, _fromNum, _toNum);
51     a->autorelease();
52     return a;
53 }
54 
55 void NumberChange::startWithTarget(cocos2d::Node *target)
56 {
57     ActionInterval::startWithTarget(target);
58     LabelProtocol *pLabel = dynamic_cast<LabelProtocol*>(target);
59     if (pLabel)
60     {
61         std::string numStr = cocos2d::StringUtils::format("%i", _fromNum);
62         pLabel->setString(numStr.c_str());
63     }
64 }
65 
66 NumberChange* NumberChange::reverse() const
67 {
68     return NumberChange::create(_duration, _toNum, _fromNum);
69 }
70 
71 
72 void NumberChange::update(float t)
73 {
74     LabelProtocol *pLabel = dynamic_cast<LabelProtocol*>(_target);
75     if (pLabel)
76     {
77         int tempNum = (_toNum - _fromNum) * t;
78         int num = _fromNum + tempNum;
79         std::string numStr = cocos2d::StringUtils::format("%i", num);
80         pLabel->setString(numStr.c_str());
81     }
82 }
83 
84 //NS_CC_END

 

posted @ 2014-12-24 18:38  CreeperChange  阅读(945)  评论(0)  编辑  收藏  举报