新手引导是游戏开发过程中必须要有的模块。以下的代码实现了整个游戏界面只有一个按钮可以点击，这刚好是做新手引导所必须的功能。
首先自定义一个按钮，这个按钮的参数有优先级，方法实现的代理，优先级等：
//
//B_Button.h
//HelloCpp
//
//Created by blary on 14-8-16.
//
//
#ifndef __HelloCpp__B_Button__
#define __HelloCpp__B_Button__
#include
#include "cocos2d.h"
using namespace cocos2d;
class B_Button : public CCLayer, public CCTargetedTouchDelegate
{
public:
virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);
virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);
bool initWithImageAndMethodAndPriority(const char* normal, const char* selected, int n, void(*f)(int), CCObject* tar, int priority = kCCMenuHandlerPriority);
private:
CCSprite* normalS;
CCSprite* selectedS;
CCObject* target;
int pid;
void (*handler)(int);
};
#endif /* defined(__HelloCpp__B_Button__) */
下面是实现部分：
//
//B_Button.cpp
//HelloCpp
//
//Created by blary on 14-8-16.
//
//
#include "B_Button.h"
bool B_Button::initWithImageAndMethodAndPriority(const char* normal, const char* selected, int n, void(*f)(int), CCObject* tar, int priority)
{
if (!CCLayer::init()) {
return false;
}
normalS = CCSprite::create(normal);
selectedS = CCSprite::create(selected);
target = tar;
pid = n;
normalS->setVisible(true);
selectedS->setVisible(false);
addChild(normalS,1);
addChild(selectedS,1);
handler=f;
CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate((CCTargetedTouchDelegate*)this, priority, true);
return true;
}
bool B_Button::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent)
{
CCPoint p = pTouch->getLocation();
p = CCDirector::sharedDirector()->convertToUI(p);
CCRectr = selectedS->boundingBox();
CCRect rect(r.origin.x + getPositionX(),r.origin.y + getPositionY(), r.size.width, r.size.height);
if (rect.containsPoint(p))
{
normalS->setVisible(false);
selectedS->setVisible(true);
}
return true;
}
void B_Button::ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent)
{
if (normalS->isVisible()==false&&selectedS->isVisible()==true)
{
normalS->setVisible(false);
selectedS->setVisible(true);
}
CCPoint p = pTouch->getLocation();
p = CCDirector::sharedDirector()->convertToUI(p);
CCRectr = selectedS->boundingBox();
CCRect rect(r.origin.x + getPositionX(),r.origin.y + getPositionY(), r.size.width, r.size.height);
if (rect.containsPoint(p)) {
(handler)(pid);
normalS->setVisible(true);
selectedS->setVisible(false);
}
}
下面是如何使用的部分：
#pragma once
#include "cocos2d.h"
class HelloWorld : public cocos2d::CCLayer
{
public:
virtual bool init();
static cocos2d::CCScene* scene();
CREATE_FUNC(HelloWorld);
};
#ifdef __cplusplus
extern "C" {
#endif
void shutdownGame(int a);
#ifdef __cplusplus
}
#endif
#include "HelloWorldScene.h"
#include "B_Button.h"
using namespace cocos2d;
// 枚举值定义 一般都是layer名称＋作用
enum {
HELLO_LAYER_BOTTON_A,
HELLO_LAYER_BUTTON_AA,
HELLO_LAYER_BUTTON_B,
HELLO_LAYER_BUTTON_BB,
};
CCScene* HelloWorld::scene()
{
CCScene * scene = NULL;
do{
scene = CCScene::create();
HelloWorld *layer = HelloWorld::create();
scene->addChild(layer);
} while (0);
return scene;
}
bool HelloWorld::init()
{
if (!CCLayer::init()) {
return false;
}
CCSize win = CCDirector::sharedDirector()->getWinSize();
// 使用自定义按钮 你可以使用默认的优先级按钮
B_Button* a = new B_Button;
a->initWithImageAndMethodAndPriority("CloseNormal.png", "CloseSelected.png", HELLO_LAYER_BOTTON_A, shutdownGame, this, 0);
a->setPosition(CCPoint(win.width/2, win.height/2));
addChild(a, 1);
a->autorelease();
B_Button* b = new B_Button;
b->initWithImageAndMethodAndPriority("CloseNormal.png", "CloseSelected.png", HELLO_LAYER_BUTTON_B, shutdownGame, this, 1);
b->setPosition(CCPoint(win.width/2, win.height/2));
addChild(b, 1);
b->autorelease();
B_Button* aa = new B_Button;
aa->initWithImageAndMethodAndPriority("CloseNormal.png", "CloseSelected.png", HELLO_LAYER_BUTTON_AA, shutdownGame, this, 0);
aa->setPosition(CCPoint(win.width/2 + 100, win.height/2));
addChild(aa, 2);
aa->autorelease();
B_Button* bb = new B_Button;
bb->initWithImageAndMethodAndPriority("CloseNormal.png", "CloseSelected.png", HELLO_LAYER_BUTTON_BB, shutdownGame, this, 1);
bb->setPosition(CCPoint(win.width/2 + 100, win.height/2));
addChild(bb, 2);
bb->autorelease();
return true;
}
#ifdef __cplusplus
extern "C" {
#endif
void shutdownGame(int a)
{
switch (a) {
case HELLO_LAYER_BUTTON_BB:
{
printf(" BB !\n");
}
break;
case HELLO_LAYER_BUTTON_B:
{
printf(" B !\n");
}
break;
case HELLO_LAYER_BUTTON_AA:
{
printf(" AA !\n");
}
break;
case HELLO_LAYER_BOTTON_A:
{
printf(" A !\n");
}
break;
default:
break;
}
}
#ifdef __cplusplus
}
#endif
这样总是只能保证只有一个按钮相应事件，即使他们的优先级相同。基于上面的实现，我们可以很方便的实现新手引导模块的开发。
