[cocos2d-x]飞机大战 遇到的bug和总结（一）

第一点：#

Sequence* sequence=Sequence::create(actionMove, actionFinished,NULL);

create方法的最后必须加上NULL，不然会报出异常，异常的信息为_last,_split为？？？，内存无法访问

第二点#

actionFinished=CCCallFuncN::create(this,callfuncN_selector(Enemy::removeEnemy));

制造一个回调函数，下面是它的源码

class Node;

typedef void (Ref::*SEL_CallFunc)();
typedef void (Ref::*SEL_CallFuncN)(Node*);
typedef void (Ref::*SEL_CallFuncND)(Node*, void*);
typedef void (Ref::*SEL_CallFuncO)(Ref*);
typedef void (Ref::*SEL_MenuHandler)(Ref*);
typedef void (Ref::*SEL_SCHEDULE)(float);

#define CC_CALLFUNC_SELECTOR(_SELECTOR) static_cast<cocos2d::SEL_CallFunc>(&_SELECTOR)
#define CC_CALLFUNCN_SELECTOR(_SELECTOR) static_cast<cocos2d::SEL_CallFuncN>(&_SELECTOR)
#define CC_CALLFUNCND_SELECTOR(_SELECTOR) static_cast<cocos2d::SEL_CallFuncND>(&_SELECTOR)
#define CC_CALLFUNCO_SELECTOR(_SELECTOR) static_cast<cocos2d::SEL_CallFuncO>(&_SELECTOR)
#define CC_MENU_SELECTOR(_SELECTOR) static_cast<cocos2d::SEL_MenuHandler>(&_SELECTOR)
#define CC_SCHEDULE_SELECTOR(_SELECTOR) static_cast<cocos2d::SEL_SCHEDULE>(&_SELECTOR)

// Deprecated，下面这些是已经不再使用的
#define callfunc_selector(_SELECTOR) CC_CALLFUNC_SELECTOR(_SELECTOR)
#define callfuncN_selector(_SELECTOR) CC_CALLFUNCN_SELECTOR(_SELECTOR)
#define callfuncND_selector(_SELECTOR) CC_CALLFUNCND_SELECTOR(_SELECTOR)
#define callfuncO_selector(_SELECTOR) CC_CALLFUNCO_SELECTOR(_SELECTOR)
#define menu_selector(_SELECTOR) CC_MENU_SELECTOR(_SELECTOR)
#define schedule_selector(_SELECTOR) CC_SCHEDULE_SELECTOR(_SELECTOR)

注意在使用CC_CALLFuncN时传入的参数必须为Node*类型，否则编译器会报错，无法将xxx转换成typedef void (Ref::SEL_CallFuncN)(Node);（项目中使用的是Sprite*，所以报错了）

    static HeroLayer* sharedPlane;//单例模式
    static HeroLayer*getInstance();
    HeroLayer* HeroLayer::getInstance()
{
    if (!sharedPlane)
    {
        auto ptr = new HeroLayer;
        if (ptr&&ptr->init())
        {
            ptr->autorelease();
            sharedPlane = ptr;
        }
        else
        {
            delete ptr;
            ptr = nullptr;
        }
    }
    else
        return sharedPlane;

}

单例模式，只允许存在一个这样类的对象，上述为我的实现方式。

第三点#

    auto animation = Animation::create();
    animation->setDelayPerUnit(0.1f);
    animation->addSpriteFrame(cache->getSpriteFrameByName("hero1.png"));
    animation->addSpriteFrame(cache->getSpriteFrameByName("hero2.png"));
    auto animate = Animate::create(animation);
    hero->runAction(RepeatForever::create(animate));//执行帧动画

飞机的帧动画实现方式