使用cocoswidget库

使用cocoswidget来实现

很简答，配置好cocoswidget之后，就可以直接使用了。代码如下：

class WelcomeScene : public cocos2d::CCLayer
{
public:
。。。。。
。。。。。
    virtual bool init();
    void onTouched(CCObject* pSender, float fx, float fy);
};

bool WelcomeScene::init()
{
    if ( !CCLayer::init() )
    {
        return false;
    }

    CWidgetWindow* m_pWindow = CWidgetWindow::create();
    m_pWindow->setMultiTouchEnabled(true);
    this->addChild(m_pWindow);

    CControlView* pView = CControlView::create("control_baseboard.png", "control_joystick.png");
    pView->setPosition(CCPoint(100, 100));
    pView->setAnchorPoint(CCPointZero);
    pView->setRadius(pView->getContentSize().width / 2);//直接设置即可，原作者没有透漏作用
    pView->setOnControlListener(this, ccw_control_selector(WelcomeScene::onTouched));//回调函数
    pView->setOpacity(200);//设置透明度
    m_pWindow->addChild(pView);

    return true;
}

void WelcomeScene::onTouched(CCObject* pSender, float fx, float fy)
{
    CCLOG("x = %f  y = %f", fx, fy);
}

如何配置cocoswidget请参考【 http://cstriker1407.info/blog/cocos2dx-study-notes-custom-engineering-path-and-cocoswidget-configuration/ 】。

截图：

自己写一个

参考

【 http://www.himigame.com/iphone-cocos2dx/721.html 】

【 http://blog.csdn.net/kuloveyouwei/article/details/9101833 】

Joystick.h：

#ifndef __JOYSTICK_H__
#define __JOYSTICK_H__

#include "cocos2d.h"

class HRocker :public cocos2d::CCLayer {
    public :
    //初始化 aPoint是摇杆中心 aRadius是摇杆半径 aJsSprite是摇杆控制点 aJsBg是摇杆背景
    static HRocker*  HRockerWithCenter(cocos2d::CCPoint aPoint ,float aRadius ,cocos2d::CCSprite* aJsSprite,cocos2d::CCSprite* aJsBg,bool _isFollowRole);
    //启动摇杆
    void Active();
    //解除摇杆
    void Inactive();
    cocos2d::CCPoint getDirection();

private:
    HRocker * initWithCenter(cocos2d::CCPoint aPoint ,float aRadius ,cocos2d::CCSprite* aJsSprite,cocos2d::CCSprite* aJsBg,bool _isFollowRole);
    cocos2d::CCPoint centerPoint;//摇杆中心
    cocos2d::CCPoint currentPoint;//摇杆当前位置
    bool active;//是否激活摇杆
    float radius;//摇杆半径
    cocos2d::CCSprite *jsSprite;
    bool isFollowRole;//是否跟随用户点击
    float getVelocity();
    void  updatePos(float dt);
    virtual bool ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
    virtual void ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);
    virtual void ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent);

    CREATE_FUNC(HRocker);
};


#endif // __JOYSTICK_H__

Joystick.cpp： 

#include "Joystick.h"
using namespace cocos2d;

void HRocker::updatePos(float dt){
    jsSprite->setPosition(ccpAdd(jsSprite->getPosition(),ccpMult(ccpSub(currentPoint, jsSprite->getPosition()),0.5)));
}
//启动摇杆
void HRocker::Active()
{
    if (!active) {
        active=true;
        schedule(schedule_selector(HRocker::updatePos));//添加刷新函数
        CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0,false);
    }else {
    }
}
//解除摇杆
void   HRocker::Inactive()
{
    if (active) {
        active=false;
        this->unschedule(schedule_selector(HRocker::updatePos));//删除刷新
         CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);//删除委托
    }else {
    }
}
//摇杆方位
CCPoint HRocker::getDirection()
{
    return ccpNormalize(ccpSub(centerPoint, currentPoint));
}
//摇杆力度
float HRocker::getVelocity()
{
    return ccpDistance(centerPoint, currentPoint);
}
HRocker* HRocker:: HRockerWithCenter(CCPoint aPoint ,float aRadius ,CCSprite* aJsSprite,CCSprite* aJsBg,bool _isFollowRole){
    HRocker *jstick=HRocker::create();
    jstick->initWithCenter(aPoint,aRadius,aJsSprite,aJsBg,_isFollowRole);
    return jstick;
}
bool HRocker::ccTouchBegan(CCTouch* touch, CCEvent* event)
{
    if (!active)
        return false;
    this->setVisible(true);
    CCPoint touchPoint = touch->getLocationInView();
    touchPoint = CCDirector:: sharedDirector()->convertToGL(touchPoint);
    if(!isFollowRole){
        if (ccpDistance(touchPoint, centerPoint) > radius){
            return false;
        }
    }
    currentPoint = touchPoint;
    if(isFollowRole){
        centerPoint=currentPoint;
        jsSprite->setPosition(currentPoint);
        this->getChildByTag(88)->setPosition(currentPoint);
    }
    return true;
}
void  HRocker::ccTouchMoved(CCTouch* touch, CCEvent* event)
{
    CCPoint touchPoint = touch->getLocationInView();
    touchPoint = CCDirector:: sharedDirector()->convertToGL(touchPoint);
    if (ccpDistance(touchPoint, centerPoint) > radius)
    {
        currentPoint =ccpAdd(centerPoint,ccpMult(ccpNormalize(ccpSub(touchPoint, centerPoint)), radius));
    }else {
        currentPoint = touchPoint;
    }
}
void  HRocker::ccTouchEnded(CCTouch* touch, CCEvent* event)
{
    currentPoint = centerPoint;
    if(isFollowRole){
        this->setVisible(false);
    }
}
HRocker* HRocker::initWithCenter(CCPoint aPoint ,float aRadius ,CCSprite* aJsSprite,CCSprite* aJsBg,bool _isFollowRole){
    isFollowRole =_isFollowRole;
    active = false;
    radius = aRadius;
    if(!_isFollowRole){
        centerPoint =aPoint;
    }else{
        centerPoint =ccp(0,0);
    }
    currentPoint = centerPoint;
    jsSprite = aJsSprite;
    jsSprite->setPosition(centerPoint);
    aJsBg->setPosition(centerPoint);
    aJsBg->setTag(88);
    this->addChild(aJsBg);
    this->addChild(jsSprite);
    if(isFollowRole){
        this->setVisible(false);
    }
    this->Active();//激活摇杆
    return this;
}

使用方法：

class WelcomeScene : public cocos2d::CCLayer
{
public:
。。。。。
。。。。。
    virtual bool init();
};

bool WelcomeScene::init()
{
    if ( !CCLayer::init() )
    {
        return false;
    }

    CCSprite *spRocker= CCSprite::create("control_joystick.png");
    CCSprite *spRockerBG=CCSprite::create("control_baseboard.png");
    HRocker *rocker=HRocker::HRockerWithCenter(ccp(210.0f,130.0f),50.0f ,spRocker ,spRockerBG,false);
    this->addChild(rocker);

    CCSprite *spRocker2 = CCSprite::create("control_joystick.png");
    CCSprite *spRockerBG2 = CCSprite::create("control_baseboard.png");
    HRocker* rocker2=HRocker::HRockerWithCenter(ccp(210.0f,130.0f),50.0f ,spRocker2 ,spRockerBG2,true);
    this->addChild(rocker2);

    return true;
}

截图：