用C++函数指针封装自定义的Button

自定义Button类：

//
//  CustomButton.h
//  fun_point_button
//
//  Created by Forest on 16/4/28.
//
//

#ifndef __fun_point_button__CustomButton__
#define __fun_point_button__CustomButton__

#include <stdio.h>
#include "cocos2d.h"
USING_NS_CC;

typedef enum {
    STANDARD,
    CHANGE_IMG,
    SHAKE
}ButtonType;

typedef enum {
    Began,
    Moved,
    Ended
}TouchState;

class CustomButton;
typedef void (CCObject::*FUNCTION)(CustomButton*);
#define function_selector(_SEC) (FUNCTION)(&_SEC)

class CustomButton:public CCNode , public CCStandardTouchDelegate {

public:
    // 创建标准button
    static CustomButton* createButton(const char* normalImage,CCObject* target,FUNCTION callBack);
    // 创建换图button
    static CustomButton* createChangeImageButton(const char* normalImage,const char* selectedImage,CCObject* target,FUNCTION callBack);
    // 创建抖动button
    static CustomButton* createShakeButton(const char* normalImage,CCObject* target,FUNCTION callBack);

    CC_SYNTHESIZE(int, m_tag, Tag);
    CC_SYNTHESIZE(std::string, m_name, Name);

    void setButtonType(ButtonType type);

    // 开启按钮
    void startButton();
    // 结束按钮
    void stopButton();
private:
    CustomButton();
    ~CustomButton();
    void onEnter();
    void onExit();
    // 触摸方法
    virtual void ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent) ;
    virtual void ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent) ;
    virtual void ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent) ;

    bool initButton(const char* normalImage,CCObject* target,FUNCTION callBack);
    bool initChangeImageButton(const char* normalImage,const char* selectedImage,CCObject* target,FUNCTION callBack);

    CCSprite* m_normalImage;
    CCSprite* m_selectedImage;
    ButtonType m_type;
    bool m_isInside;
    CCPoint m_beganPoint;

    CCObject* m_target;
    FUNCTION  m_callBack;

    CCTouch* m_touch;

    bool isTouchInside(CCTouch* touch);
    // 执行回调
    void executeEvent();
    // 标准按钮处理
    void standardEvent();
    // 换图按钮处理
    void changeImageEvent(TouchState state);
    // 抖动按钮处理
    void shakeEvent(TouchState state);
};

#endif /* defined(__fun_point_button__CustomButton__) */

//
//  CustomButton.cpp
//  fun_point_button
//
//  Created by Forest on 16/4/28.
//
//

#include "CustomButton.h"

CustomButton::CustomButton(){
}
CustomButton::~CustomButton(){
}

void CustomButton::onEnter(){
    CCNode::onEnter();
}

void CustomButton::onExit(){
    CCNode::onExit();
    this->stopButton();
}

CustomButton* CustomButton::createButton(const char *normalImage, cocos2d::CCObject *target, FUNCTION callBack){
    CustomButton* button = new CustomButton();
    if (button && button->initButton(normalImage, target, callBack)) {
        button->setButtonType(STANDARD);
        button->autorelease();
        return button;
    }
    CC_SAFE_DELETE(button);
    return NULL;
}

bool CustomButton::initButton(const char *normalImage, cocos2d::CCObject *target, FUNCTION callBack){
    if (!CCNode::init()) {
        return false;
    }
    m_normalImage = CCSprite::create(normalImage);
    this->addChild(m_normalImage);
    m_normalImage->setVisible(false);

    m_target = target;
    m_callBack = callBack;

    this->startButton();
    return true;
}

CustomButton* CustomButton::createChangeImageButton(const char *normalImage, const char *selectedImage, cocos2d::CCObject *target, FUNCTION callBack){
    CustomButton* button = new CustomButton();
    if (button && button->initChangeImageButton(normalImage, selectedImage, target, callBack)) {
        button->setButtonType(CHANGE_IMG);
        button->autorelease();
        return button;
    }
    CC_SAFE_DELETE(button);
    return NULL;
}

bool CustomButton::initChangeImageButton(const char *normalImage, const char *selectedImage, cocos2d::CCObject *target, FUNCTION callBack){
    if (!this->initButton(normalImage, target, callBack)) {
        return false;
    }
    m_selectedImage = CCSprite::create(selectedImage);
    this->addChild(m_selectedImage);
    m_selectedImage->setVisible(false);

    return true;
}

CustomButton* CustomButton::createShakeButton(const char *normalImage, cocos2d::CCObject *target, FUNCTION callBack){
    CustomButton* button = new CustomButton();
    if (button && button->initButton(normalImage, target, callBack)) {
        button->setButtonType(SHAKE);
        button->autorelease();
        return button;
    }
    CC_SAFE_DELETE(button);
    return NULL;
}

void CustomButton::setButtonType(ButtonType type){
    m_type = type;
}
// 显示 注册 开始按钮
void CustomButton::startButton(){
    m_normalImage->setVisible(true);
    // 会使引用计数 +1
    CCDirector::sharedDirector()->getTouchDispatcher()->addStandardDelegate(this, 0);
}
// 隐藏 注销 结束按钮
void CustomButton::stopButton(){
    m_normalImage->setVisible(false);
    CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
}

// 触摸方法
void CustomButton::ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent){
    CCSetIterator iter = pTouches->begin();
    while (iter != pTouches->end()) {
        CCTouch* touch = (CCTouch*)(*iter);
        if (this->isTouchInside(touch)) {
            m_touch = touch;
            m_beganPoint = touch->getLocation();
            m_isInside = true;
            switch (m_type) {
                case STANDARD:

                    break;
                case CHANGE_IMG:
                    this->changeImageEvent(Began);
                    break;
                case SHAKE:
                    this->shakeEvent(Began);
                    break;
                default:
                    break;
            }
            break;
        }
        ++iter;
    }
}
void CustomButton::ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent){
    CCSetIterator iter = pTouches->begin();
    while (iter != pTouches->end()) {
        CCTouch* touch = (CCTouch*)(*iter);
        ++iter;
        if (touch != m_touch) {
            continue;
        }
        if (this->isTouchInside(touch)) {
            if (!m_isInside) {
                m_isInside = false;
            }
            switch (m_type) {
                case STANDARD:

                    break;
                case CHANGE_IMG:
                    this->changeImageEvent(Moved);
                    break;
                case SHAKE:
                    this->shakeEvent(Moved);
                    break;
                default:
                    break;
            }
            break;
        }else{
            m_isInside = false;
        }
    }
}
void CustomButton::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent){
    CCSetIterator iter = pTouches->begin();
    while (iter != pTouches->end()) {
        CCTouch* touch = (CCTouch*)(*iter);
        ++iter;
        if (touch != m_touch) {
            continue;
        }
        if (this->isTouchInside(touch) && m_isInside) {
            CCPoint endPoint = touch->getLocation();
            if (abs((int)m_beganPoint.x -(int)endPoint.x) < 10 && abs((int)m_beganPoint.y - (int)endPoint.y) < 10){
                switch (m_type) {
                    case STANDARD:
                        this->standardEvent();
                        break;
                    case CHANGE_IMG:
                        this->changeImageEvent(Ended);
                        break;
                    case SHAKE:
                        this->shakeEvent(Ended);
                        break;
                    default:
                        break;
                }
            }
            break;
        }else{
            switch (m_type) {
                case STANDARD: break;
                case CHANGE_IMG:
                    m_normalImage->setVisible(true);
                    m_selectedImage->setVisible(false);
                    break;
                case SHAKE:
                    m_normalImage->setScale(1.0f);
                    m_normalImage->stopAllActions();
                    break;
            }
        }
    }
}

// 触摸是否在按钮上
bool CustomButton::isTouchInside(CCTouch* touch){
    CCPoint p = touch->getLocation();
    CCPoint point = m_normalImage->convertToNodeSpace(p);
    CCRect rect(0.0f, 0.0f, m_normalImage->getContentSize().width, m_normalImage->getContentSize().height);
    return rect.containsPoint(point);
}

void CustomButton::executeEvent(){
    if (m_target && m_callBack) {
        (m_target->*m_callBack)(this);
    }
}

void CustomButton::standardEvent(){
    this->executeEvent();
}

void CustomButton::changeImageEvent(TouchState state){
    switch (state) {
        case Began:
            m_normalImage->setVisible(false);
            m_selectedImage->setVisible(true);
            break;
        case Moved:
            m_normalImage->setVisible(false);
            m_selectedImage->setVisible(true);
            break;
        case Ended:
            m_normalImage->setVisible(true);
            m_selectedImage->setVisible(false);
            this->executeEvent();
            break;
        default:
            break;
    }
}

void CustomButton::shakeEvent(TouchState state){
    switch (state) {
        case Began:
            m_normalImage->stopAllActions();
            m_normalImage->setScaleX(1.2);
            m_normalImage->setScaleY(0.8);
            break;
        case Moved:
        {
            CCScaleTo* scaleTo = CCScaleTo::create(1.5, 1);
            CCEaseBounceOut* bounce = CCEaseBounceOut::create(scaleTo);
            m_normalImage->runAction(bounce);
        }
            break;
        case Ended:
        {
            CCScaleTo* scaleTo = CCScaleTo::create(0.8, 1);
            CCEaseBounceOut* bounce = CCEaseBounceOut::create(scaleTo);
            m_normalImage->runAction(bounce);
            this->executeEvent();
        }
            break;
        default:
            break;
    }
}

在HelloWorld场景中使用：

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"
#include "CustomButton.h"
class HelloWorld : public cocos2d::CCLayer
{
public:
    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
    virtual bool init();  

    // there's no 'id' in cpp, so we recommend returning the class instance pointer
    static cocos2d::CCScene* scene();

    // a selector callback
    void menuCloseCallback(CCObject* pSender);

    // implement the "static node()" method manually
    CREATE_FUNC(HelloWorld);

    // button callBack
    void buttonCallBack(CustomButton* button);

    CCLabelTTF* pLabel;
    CustomButton* button3;
};

#endif // __HELLOWORLD_SCENE_H__

#include "HelloWorldScene.h"

USING_NS_CC;

CCScene* HelloWorld::scene()
{
    // 'scene' is an autorelease object
    CCScene *scene = CCScene::create();

    // 'layer' is an autorelease object
    HelloWorld *layer = HelloWorld::create();

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    //
    // 1. super init first
    if ( !CCLayer::init() )
    {
        return false;
    }

    CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
    CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();

    /
    // 2. add a menu item with "X" image, which is clicked to quit the program
    //    you may modify it.

    // add a "close" icon to exit the progress. it's an autorelease object
    CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
                                        "CloseNormal.png",
                                        "CloseSelected.png",
                                        this,
                                        menu_selector(HelloWorld::menuCloseCallback));

    pCloseItem->setPosition(ccp(origin.x + visibleSize.width - pCloseItem->getContentSize().width/2 ,
                                origin.y + pCloseItem->getContentSize().height/2));

    // create menu, it's an autorelease object
    CCMenu* pMenu = CCMenu::create(pCloseItem, NULL);
    pMenu->setPosition(CCPointZero);
    this->addChild(pMenu, 1);

    /
    // 3. add your codes below...

    // add a label shows "Hello World"
    // create and initialize a label

    pLabel = CCLabelTTF::create("Hello World", "Arial", 24);

    // position the label on the center of the screen
    pLabel->setPosition(ccp(origin.x + visibleSize.width/2,
                            origin.y + visibleSize.height - pLabel->getContentSize().height));

    // add the label as a child to this layer
    this->addChild(pLabel, 1);

    // add "HelloWorld" splash screen"
    CCSprite* pSprite = CCSprite::create("HelloWorld.png");

    // position the sprite on the center of the screen
    pSprite->setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));

    // add the sprite as a child to this layer
    this->addChild(pSprite, 0);

    CustomButton* button = CustomButton::createButton("Icon-144.png", this, function_selector(HelloWorld::buttonCallBack));
    button->setPosition(ccp(150, visibleSize.height/2 + origin.y));
    button->setTag(10);
    button->setName("Standard");
    this->addChild(button);

    CustomButton* button2 = CustomButton::createChangeImageButton("Icon-144.png", "baowu_007.png", this, function_selector(HelloWorld::buttonCallBack));
    this->addChild(button2);
    button2->setPosition(button->getPositionX(),button->getPositionY()-200);
    button2->setTag(11);
    button2->setName("ChangeImage");

    button3 = CustomButton::createShakeButton("Icon-144.png", this, function_selector(HelloWorld::buttonCallBack));
    this->addChild(button3);
    button3->setPosition(button->getPositionX(),button->getPositionY()+200);
    button3->setTag(12);
    button3->setName("Shake");

    return true;
}

void HelloWorld::buttonCallBack(CustomButton *button){
    pLabel->setString(button->getName().c_str());
    pLabel->setFontSize(30.0f);
    pLabel->setColor(ccYELLOW);
}

void HelloWorld::menuCloseCallback(CCObject* pSender)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT) || (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)
    CCMessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");
#else
    CCDirector::sharedDirector()->end();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    exit(0);
#endif
#endif
}

运行效果：

最后

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