Question

我有Android开发背景。几天前，我开始学习Cocos2d-x进行游戏开发。我正在创建一个简单的启动画面和一些菜单屏幕，但卡在一些应用程序崩溃问题。我希望Splash Scene保持3秒钟并在此之后加载MenuScene。所以我尝试使用schedule方法来替换场景。但是在执行计划任务时我遇到了崩溃。这是我的简单课程;

Splash.h课程：

#ifndef SPLASHSCREEN_H_
#define SPLASHSCREEN_H_

#include <layers_scenes_transitions_nodes/CCLayer.h>
#include <cocos2d.h>

/**
 * Splash Screen for the game
 *
 */

USING_NS_CC;

class SplashScreen: public cocos2d::CCLayer {
public:
    SplashScreen();
    virtual ~SplashScreen();
    virtual bool init();
    static cocos2d::CCScene* newInstance();
    void endSplash(float dt);

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


};

#endif

SplashScreen.cpp：

    #define COCOS2D_DEBUG 1

#include "SplashScreen.h"
#include "GeneralMenuScreen.h"


USING_NS_CC;

SplashScreen::SplashScreen() {
    // TODO Auto-generated constructor stub

}

SplashScreen::~SplashScreen() {
    // TODO Auto-generated destructor stub
}

bool SplashScreen::init() {

    if(! CCLayer::init() ) {
        return false;
    }
    CCSize windowSize = CCDirector::sharedDirector()->getVisibleSize();
    CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();

    CCSprite* background = CCSprite::create("background.png");
    background->setPosition(ccp(origin.x + windowSize.width/2, origin.y + windowSize.height/2));
    this->addChild(background);

    CCLabelTTF* loadingText = CCLabelTTF::create("Loading...", "Arial", 36);
    loadingText->setAnchorPoint(ccp(0,0));
    loadingText->setPosition(ccp(origin.x + windowSize.width/2 - loadingText->getContentSize().width/2, origin.y + windowSize.height/2 - loadingText->getContentSize().height/2));
    this->addChild(loadingText);

    /*  this->schedule(schedule_selector(SplashScreen::endSplash), 5.0);        */
CCDirector::sharedDirector()->getScheduler()->scheduleSelector(schedule_selector(SplashScreen::endSplash), this , 5, false, 0, 0 );

/*   CCTimer* ccTimer = CCTimer::timerWithTarget(this, schedule_selector(SplashScreen::endSplash), 5.0f);
ccTimer->update(1.0);       */


/* CCDelayTime* startDelay = CCDelayTime::create(5.0);
CCCallFunc *showHearts = CCCallFunc::create(this, callfunc_selector(SplashScreen::endSplash));
CCSequence* seq = CCSequence::create(startDelay, showHearts);
background->runAction(seq);*/

    return true;

}


CCScene* SplashScreen::newInstance() {

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

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

    scene->addChild(splashScreen);

    return scene;

}

void SplashScreen::endSplash(float dt) {

    //CCLOG("FilePath = %f", dt);
    CCScene* menuScreen = GeneralMenuScreen::newInstance();
    CCDirector::sharedDirector()->replaceScene(menuScreen);

}

GeneralMenuScreen.cpp：

#include "GeneralMenuScreen.h"

USING_NS_CC;

GeneralMenuScreen::GeneralMenuScreen() {

}

GeneralMenuScreen::~GeneralMenuScreen() {

}

CCScene* GeneralMenuScreen::newInstance() {

    CCScene* scene = CCScene::create();
    GeneralMenuScreen* layer = GeneralMenuScreen::create();
    scene->addChild(layer);

    return scene;

}

bool GeneralMenuScreen::init() {

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

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

    CCSprite* background = CCSprite::create("background.png");
    background->setPosition(ccp(origin.x + windowSize.width/2, origin.y + windowSize.height/2));
    this->addChild(background);

    int margin = 10;

    CCLabelTTF* playLabel = CCLabelTTF::create("PLAY", "Arial", 36);
    CCMenuItemLabel* menuPlay = CCMenuItemLabel::create(playLabel);
    menuPlay->setPosition(origin.x + windowSize.width/2 - menuPlay->getContentSize().width/2, origin.y + windowSize.height/2 + menuPlay->getContentSize().height + margin/2 );

    CCMenu* menu = CCMenu::create(menuPlay);
    menu->setPosition(CCPointZero);
    this->addChild(menu);


    return true;


}

启动屏幕运行但是在3秒之后，没有调用endSplash方法并且应用程序崩溃。我从来没有用C / C ++编程。知道我哪里错了吗？而且，有没有办法使用像android / ios中的调试器调试cocos2d-x应用程序？

Answer 1

您可以使用gdb进行调试。

你在为那些getInstance方法编写什么？在大多数情况下，一对create + init就足够了。

也许尝试使用CCDirector :: sharedDirector（） - ＆gt; getScheduler（） - ＆gt; scheduleSelector或只是在您的对象上运行调用某个方法的操作：http://www.cocos2d-x.org/reference/native-cpp/V3.0alpha0/d3/d32/classcocos2d_1_1_call_func.html。管理对象上运行的操作比处理调度程序IMO更容易。

当出现此类错误时，您可能需要尝试放置一些断言来检查对象是否已死（检查是否为nullptr和retaincount）。然后用调试器运行它以查看爆炸发生的位置。现在我在代码中找不到错误，我会尝试在家中运行它。

Answer 2

经过一番调查后发现：

CCObject的构造函数应该是私有的（读作：几乎总是必须的）
在CCObject.h中使用static_cast替换defualt c-like castring是一个好主意 - ＆gt;你将避免长时间调试选择器
您的代码在VC12下适用于我（但我使用的是pushScene而不是replaceScene） - ＆gt;你在使用cocos的主分支吗？

Answer 3

而不是......

CCDirector::sharedDirector()->getScheduler()->scheduleSelector(schedule_selector(SplashScreen::endSplash), this , 5, false, 0, 0 );

试试这个..

this->scheduleOnce(schedule_selector(SplashScreen::endSplash),delayTime);

其中delayTime = 3或任何其他内容。

Answer 4

使用此功能可以帮助您

schedule(SEL_SCHEDULE(&SplashScreen::endSplash), 5);

由于ccLayer-＆gt; schedule（schedule_selector（...），...）导致的Cocos2d-x崩溃;

4 个答案: