Cocos2D-X学习笔记 3 从一个场景切换到还有一个场景

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工厂方法一般写法

StartLayer * StartLayer::create() { StartLayer *sl = new StartLayer(); sl->init(); sl->autorelease(); return sl; }

也能够用CC的CCPlatformMacros.h文件中提供的宏 CREATE_FUNC 来替代上面一段代码

#define CREATE_FUNC(__TYPE__) \ static __TYPE__* create() \ { \ __TYPE__ *pRet = new __TYPE__(); \ if (pRet && pRet->init()) \ { \ pRet->autorelease(); \ return pRet; \ } \ else \ { \ delete pRet; \ pRet = NULL; \ return NULL; \ } \ }

—————————————————-从StartLayer 到 LoadingLayer———————————————————

StartLayer.h

#pragma once #include “cocos2d.h” using namespace cocos2d; class StartLayer : public CCLayer { public: StartLayer(); virtual ~StartLayer(); bool init(); static StartLayer * create(); static CCScene * scene(); private: void clickSigle(CCObject *sender); };

StartLayer.cpp

#include “StartLayer.h” #include “LoadingLayer.h”

StartLayer::StartLayer(void) { }

StartLayer::~StartLayer(void) { }

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

//開始界面背景图片 CCSize screenSize = CCDirector::sharedDirector()->getWinSize(); CCSprite *bgSprite = CCSprite::create(“BackGround.png”); bgSprite->setPosition(CCPoint(screenSize.width/2,screenSize.height/2)); this->addChild(bgSprite);

//button的使用 CCMenuItemImage *singleItem = CCMenuItemImage::create(“btn1.png”,”btn2.png”,this,menu_selector(StartLayer::clickSigle)); singleItem->setPosition(CCPointMake(80,-80)); CCMenu *menu = CCMenu::create(singleItem,NULL); addChild(menu);

return true; }

void StartLayer::clickSigle(CCObject *sender) { CCLOG(“click sigle”);

//跳转到loadingLayer界面

//用2s 动画来切换界面 CCScene *s = LoadingLayer::scene();

CCTransitionSplitRows *trans = CCTransitionSplitRows::create(2,s); CCDirector::sharedDirector()->replaceScene(trans); }

StartLayer * StartLayer::create() { StartLayer *sl = new StartLayer(); sl->init(); sl->autorelease(); return sl; }

CCScene * StartLayer::scene() { StartLayer *sl = StartLayer::create(); CCScene *s = CCScene::create(); s->addChild(sl); return s; }

——————————————————————————————

LoadingLayer.h

#pragma once #include “cocos2d.h” USING_NS_CC;

class LoadingLayer : public CCLayer { public: int count; LoadingLayer(void); ~LoadingLayer(void); bool init(); static LoadingLayer * create(); static CCScene * scene();

//生命周期 virtual void onEnter(); virtual void onExit(); virtual void onEnterTransitionDidFinish();

private: void timeUpdate(float dt);

};

LoadingLayer.cpp

#include “LoadingLayer.h” LoadingLayer::LoadingLayer(void) { }

LoadingLayer::~LoadingLayer(void) { }

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

//载入载入界面背景图片 CCSprite *bgSprite = CCSprite::create(“loading.png”); CCSize screenSize = CCDirector::sharedDirector()->getWinSize(); bgSprite->setPosition(ccp(screenSize.width/2,screenSize.height/2)); this->addChild(bgSprite);

//label的使用 CCLabelTTF* label = CCLabelTTF::create(“loading”,”Arial”,25); label->setPosition(ccp(100,150)); label->setAnchorPoint(ccp(0,0.5)); label->setTag(100); addChild(label);

count = 1; return true; }

void LoadingLayer::timeUpdate(float dt) {

//拼接字符串 CCLabelTTF *label = (CCLabelTTF*)getChildByTag(100); const char * str = label->getString(); char newstr[128]; if(++count > 5) { //停止定时器 unschedule(schedule_selector(LoadingLayer::timeUpdate)); } sprintf(newstr,”%s.”,str); label->setString(newstr);

} LoadingLayer* LoadingLayer::create() { LoadingLayer* layer = new LoadingLayer(); layer->init(); layer->autorelease(); return layer; }

CCScene* LoadingLayer::scene() { LoadingLayer* layer = LoadingLayer::create(); CCScene * s = CCScene::create(); s->addChild(layer); return s; }

void LoadingLayer::onEnter() { CCLayer::onEnter(); }

void LoadingLayer::onExit() { CCLayer::onExit(); }

void LoadingLayer::onEnterTransitionDidFinish() { CCLayer::onEnterTransitionDidFinish(); //系统有一个轻量的定时器，每隔0.5s会调用this，timeUpdate方法 this->schedule(schedule_selector(LoadingLayer::timeUpdate),0.5f); }

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